kernel.git
3 years agoMerge tag 'netfs-fixes-20211207' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 9 Dec 2021 18:49:36 +0000 (10:49 -0800)]
Merge tag 'netfs-fixes-20211207' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull netfslib fixes from David Howells:

 - Fix a lockdep warning and potential deadlock. This is takes the
   simple approach of offloading the write-to-cache done from within a
   network filesystem read to a worker thread to avoid taking the
   sb_writer lock from the cache backing filesystem whilst holding the
   mmap lock on an inode from the network filesystem.

   Jan Kara posits a scenario whereby this can cause deadlock[1], though
   it's quite complex and I think requires someone in userspace to
   actually do I/O on the cache files. Matthew Wilcox isn't so certain,
   though[2].

   An alternative way to fix this, suggested by Darrick Wong, might be
   to allow cachefiles to prevent userspace from performing I/O upon the
   file - something like an exclusive open - but that's beyond the scope
   of a fix here if we do want to make such a facility in the future.

 - In some of the error handling paths where netfs_ops->cleanup() is
   called, the arguments are transposed[3]. gcc doesn't complain because
   one of the parameters is void* and one of the values is void*.

Link: https://lore.kernel.org/r/20210922110420.GA21576@quack2.suse.cz/
Link: https://lore.kernel.org/r/Ya9eDiFCE2fO7K/S@casper.infradead.org/
Link: https://lore.kernel.org/r/20211207031449.100510-1-jefflexu@linux.alibaba.com/
* tag 'netfs-fixes-20211207' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  netfs: fix parameter of cleanup()
  netfs: Fix lockdep warning from taking sb_writers whilst holding mmap_lock

3 years agotools/lib/lockdep: drop leftover liblockdep headers
Sasha Levin [Thu, 9 Dec 2021 16:51:13 +0000 (11:51 -0500)]
tools/lib/lockdep: drop leftover liblockdep headers

Clean up remaining headers that are specific to liblockdep but lived in
the shared header directory.  These are all unused after the liblockdep
code was removed in commit 7246f4dcaccc ("tools/lib/lockdep: drop
liblockdep").

Note that there are still headers that were originally created for
liblockdep, that still have liblockdep references, but they are used by
other tools/ code at this point.

Signed-off-by: Sasha Levin <sashal@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoMerge tag 'perf-tools-fixes-for-v5.16-2021-12-07' of git://git.kernel.org/pub/scm...
Linus Torvalds [Tue, 7 Dec 2021 23:36:45 +0000 (15:36 -0800)]
Merge tag 'perf-tools-fixes-for-v5.16-2021-12-07' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix SMT detection fast read path on sysfs.

 - Fix memory leaks when processing feature headers in perf.data files.

 - Fix 'Simple expression parser' 'perf test' on arch without CPU die
   topology info, such as s/390.

 - Fix building perf with BUILD_BPF_SKEL=1.

 - Fix 'perf bench' by reverting "perf bench: Fix two memory leaks
   detected with ASan".

 - Fix itrace space allowed for new attributes in 'perf script'.

 - Fix the build feature detection fast path, that was always failing on
   systems with python3 development packages, speeding up the build.

 - Reset shadow counts before loading, fixing metrics using
   duration_time.

 - Sync more kernel headers changed by the new futex_waitv syscall: s390
   and powerpc.

* tag 'perf-tools-fixes-for-v5.16-2021-12-07' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf bpf_skel: Do not use typedef to avoid error on old clang
  perf bpf: Fix building perf with BUILD_BPF_SKEL=1 by default in more distros
  perf header: Fix memory leaks when processing feature headers
  perf test: Reset shadow counts before loading
  perf test: Fix 'Simple expression parser' test on arch without CPU die topology info
  tools build: Remove needless libpython-version feature check that breaks test-all fast path
  perf tools: Fix SMT detection fast read path
  tools headers UAPI: Sync powerpc syscall table file changed by new futex_waitv syscall
  perf inject: Fix itrace space allowed for new attributes
  tools headers UAPI: Sync s390 syscall table file changed by new futex_waitv syscall
  Revert "perf bench: Fix two memory leaks detected with ASan"

3 years agoMerge tag 'platform-drivers-x86-v5.16-3' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 7 Dec 2021 18:10:20 +0000 (10:10 -0800)]
Merge tag 'platform-drivers-x86-v5.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fixes from Hans de Goede:
 "Various bug-fixes and hardware-id additions"

* tag 'platform-drivers-x86-v5.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
  platform/x86/intel: hid: add quirk to support Surface Go 3
  platform/x86: amd-pmc: Fix s2idle failures on certain AMD laptops
  platform/x86: touchscreen_dmi: Add TrekStor SurfTab duo W1 touchscreen info
  platform/x86: lg-laptop: Recognize more models
  platform/x86: thinkpad_acpi: Add lid_logo_dot to the list of safe LEDs
  platform/x86: thinkpad_acpi: Restore missing hotkey_tablet_mode and hotkey_radio_sw sysfs-attr

3 years agonetfs: fix parameter of cleanup()
Jeffle Xu [Tue, 7 Dec 2021 03:14:49 +0000 (11:14 +0800)]
netfs: fix parameter of cleanup()

The order of these two parameters is just reversed. gcc didn't warn on
that, probably because 'void *' can be converted from or to other
pointer types without warning.

Cc: stable@vger.kernel.org
Fixes: 3d3c95046742 ("netfs: Provide readahead and readpage netfs helpers")
Fixes: e1b1240c1ff5 ("netfs: Add write_begin helper")
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Link: https://lore.kernel.org/r/20211207031449.100510-1-jefflexu@linux.alibaba.com/
3 years agonetfs: Fix lockdep warning from taking sb_writers whilst holding mmap_lock
David Howells [Tue, 7 Dec 2021 09:53:24 +0000 (09:53 +0000)]
netfs: Fix lockdep warning from taking sb_writers whilst holding mmap_lock

Taking sb_writers whilst holding mmap_lock isn't allowed and will result in
a lockdep warning like that below.  The problem comes from cachefiles
needing to take the sb_writers lock in order to do a write to the cache,
but being asked to do this by netfslib called from readpage, readahead or
write_begin[1].

Fix this by always offloading the write to the cache off to a worker
thread.  The main thread doesn't need to wait for it, so deadlock can be
avoided.

This can be tested by running the quick xfstests on something like afs or
ceph with lockdep enabled.

WARNING: possible circular locking dependency detected
5.15.0-rc1-build2+ #292 Not tainted
------------------------------------------------------
holetest/65517 is trying to acquire lock:
ffff88810c81d730 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_fault+0x276/0x7a5

but task is already holding lock:
ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #2 (&mm->mmap_lock#2){++++}-{3:3}:
       validate_chain+0x3c4/0x4a8
       __lock_acquire+0x89d/0x949
       lock_acquire+0x2dc/0x34b
       __might_fault+0x87/0xb1
       strncpy_from_user+0x25/0x18c
       removexattr+0x7c/0xe5
       __do_sys_fremovexattr+0x73/0x96
       do_syscall_64+0x67/0x7a
       entry_SYSCALL_64_after_hwframe+0x44/0xae

-> #1 (sb_writers#10){.+.+}-{0:0}:
       validate_chain+0x3c4/0x4a8
       __lock_acquire+0x89d/0x949
       lock_acquire+0x2dc/0x34b
       cachefiles_write+0x2b3/0x4bb
       netfs_rreq_do_write_to_cache+0x3b5/0x432
       netfs_readpage+0x2de/0x39d
       filemap_read_page+0x51/0x94
       filemap_get_pages+0x26f/0x413
       filemap_read+0x182/0x427
       new_sync_read+0xf0/0x161
       vfs_read+0x118/0x16e
       ksys_read+0xb8/0x12e
       do_syscall_64+0x67/0x7a
       entry_SYSCALL_64_after_hwframe+0x44/0xae

-> #0 (mapping.invalidate_lock#3){.+.+}-{3:3}:
       check_noncircular+0xe4/0x129
       check_prev_add+0x16b/0x3a4
       validate_chain+0x3c4/0x4a8
       __lock_acquire+0x89d/0x949
       lock_acquire+0x2dc/0x34b
       down_read+0x40/0x4a
       filemap_fault+0x276/0x7a5
       __do_fault+0x96/0xbf
       do_fault+0x262/0x35a
       __handle_mm_fault+0x171/0x1b5
       handle_mm_fault+0x12a/0x233
       do_user_addr_fault+0x3d2/0x59c
       exc_page_fault+0x85/0xa5
       asm_exc_page_fault+0x1e/0x30

other info that might help us debug this:

Chain exists of:
  mapping.invalidate_lock#3 --> sb_writers#10 --> &mm->mmap_lock#2

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&mm->mmap_lock#2);
                               lock(sb_writers#10);
                               lock(&mm->mmap_lock#2);
  lock(mapping.invalidate_lock#3);

 *** DEADLOCK ***

1 lock held by holetest/65517:
 #0: ffff8881595b53e8 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x28d/0x59c

stack backtrace:
CPU: 0 PID: 65517 Comm: holetest Not tainted 5.15.0-rc1-build2+ #292
Hardware name: ASUS All Series/H97-PLUS, BIOS 2306 10/09/2014
Call Trace:
 dump_stack_lvl+0x45/0x59
 check_noncircular+0xe4/0x129
 ? print_circular_bug+0x207/0x207
 ? validate_chain+0x461/0x4a8
 ? add_chain_block+0x88/0xd9
 ? hlist_add_head_rcu+0x49/0x53
 check_prev_add+0x16b/0x3a4
 validate_chain+0x3c4/0x4a8
 ? check_prev_add+0x3a4/0x3a4
 ? mark_lock+0xa5/0x1c6
 __lock_acquire+0x89d/0x949
 lock_acquire+0x2dc/0x34b
 ? filemap_fault+0x276/0x7a5
 ? rcu_read_unlock+0x59/0x59
 ? add_to_page_cache_lru+0x13c/0x13c
 ? lock_is_held_type+0x7b/0xd3
 down_read+0x40/0x4a
 ? filemap_fault+0x276/0x7a5
 filemap_fault+0x276/0x7a5
 ? pagecache_get_page+0x2dd/0x2dd
 ? __lock_acquire+0x8bc/0x949
 ? pte_offset_kernel.isra.0+0x6d/0xc3
 __do_fault+0x96/0xbf
 ? do_fault+0x124/0x35a
 do_fault+0x262/0x35a
 ? handle_pte_fault+0x1c1/0x20d
 __handle_mm_fault+0x171/0x1b5
 ? handle_pte_fault+0x20d/0x20d
 ? __lock_release+0x151/0x254
 ? mark_held_locks+0x1f/0x78
 ? rcu_read_unlock+0x3a/0x59
 handle_mm_fault+0x12a/0x233
 do_user_addr_fault+0x3d2/0x59c
 ? pgtable_bad+0x70/0x70
 ? rcu_read_lock_bh_held+0xab/0xab
 exc_page_fault+0x85/0xa5
 ? asm_exc_page_fault+0x8/0x30
 asm_exc_page_fault+0x1e/0x30
RIP: 0033:0x40192f
Code: ff 48 89 c3 48 8b 05 50 28 00 00 48 85 ed 7e 23 31 d2 4b 8d 0c 2f eb 0a 0f 1f 00 48 8b 05 39 28 00 00 48 0f af c2 48 83 c2 01 <48> 89 1c 01 48 39 d5 7f e8 8b 0d f2 27 00 00 31 c0 85 c9 74 0e 8b
RSP: 002b:00007f9931867eb0 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 00007f9931868700 RCX: 00007f993206ac00
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007ffc13e06ee0
RBP: 0000000000000100 R08: 0000000000000000 R09: 00007f9931868700
R10: 00007f99318689d0 R11: 0000000000000202 R12: 00007ffc13e06ee0
R13: 0000000000000c00 R14: 00007ffc13e06e00 R15: 00007f993206a000

Fixes: 726218fdc22c ("netfs: Define an interface to talk to a cache")
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Jeff Layton <jlayton@kernel.org>
cc: Jan Kara <jack@suse.cz>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
Link: https://lore.kernel.org/r/20210922110420.GA21576@quack2.suse.cz/
Link: https://lore.kernel.org/r/163887597541.1596626.2668163316598972956.stgit@warthog.procyon.org.uk/
3 years agoperf bpf_skel: Do not use typedef to avoid error on old clang
Song Liu [Fri, 3 Dec 2021 23:14:41 +0000 (15:14 -0800)]
perf bpf_skel: Do not use typedef to avoid error on old clang

When building bpf_skel with clang-10, typedef causes confusions like:

  libbpf: map 'prev_readings': unexpected def kind var.

Fix this by removing the typedef.

Fixes: 7fac83aaf2eecc9e ("perf stat: Introduce 'bperf' to share hardware PMCs with BPF")
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/BEF5C312-4331-4A60-AEC0-AD7617CB2BC4@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoperf bpf: Fix building perf with BUILD_BPF_SKEL=1 by default in more distros
Song Liu [Fri, 3 Dec 2021 19:32:34 +0000 (19:32 +0000)]
perf bpf: Fix building perf with BUILD_BPF_SKEL=1 by default in more distros

Arnaldo reported that building all his containers with BUILD_BPF_SKEL=1
to then make this the default he found problems in some distros where
the system linux/bpf.h file was being used and lacked this:

   util/bpf_skel/bperf_leader.bpf.c:13:20: error: use of undeclared identifier 'BPF_F_PRESERVE_ELEMS'
           __uint(map_flags, BPF_F_PRESERVE_ELEMS);

So use instead the vmlinux.h file generated by bpftool from BTF info.

This fixed these as well, getting the build back working on debian:11,
debian:experimental and ubuntu:21.10:

  In file included from In file included from util/bpf_skel/bperf_leader.bpf.cutil/bpf_skel/bpf_prog_profiler.bpf.c::33:
  :
  In file included from In file included from /usr/include/linux/bpf.h/usr/include/linux/bpf.h::1111:
  :
  /usr/include/linux/types.h/usr/include/linux/types.h::55::1010:: In file included from  util/bpf_skel/bperf_follower.bpf.c:3fatal errorfatal error:
  : : In file included from /usr/include/linux/bpf.h:'asm/types.h' file not found11'asm/types.h' file not found:

  /usr/include/linux/types.h:5:10: fatal error: 'asm/types.h' file not found
  #include <asm/types.h>#include <asm/types.h>

           ^~~~~~~~~~~~~         ^~~~~~~~~~~~~

  #include <asm/types.h>
           ^~~~~~~~~~~~~
  1 error generated.

Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/CF175681-8101-43D1-ABDB-449E644BE986@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoperf header: Fix memory leaks when processing feature headers
Ian Rogers [Thu, 18 Nov 2021 20:17:30 +0000 (12:17 -0800)]
perf header: Fix memory leaks when processing feature headers

These leaks were found with leak sanitizer running "perf pipe recording
and injection test".

In pipe mode feat_fd may hold onto an events struct that needs freeing.

When string features are processed they may overwrite an already created
string, so free this before the overwrite.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211118201730.2302927-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoperf test: Reset shadow counts before loading
Ian Rogers [Sun, 28 Nov 2021 08:58:10 +0000 (00:58 -0800)]
perf test: Reset shadow counts before loading

Otherwise load counting is an average. Without this change
duration_time in test_memory_bandwidth will alter its value if an
earlier test contains duration_time.

This patch fixes an issue that's introduced in the proposed patch:
https://lore.kernel.org/lkml/20211124015226.3317994-1-irogers@google.com/
in perf test "Parse and process metrics".

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211128085810.4027314-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoperf test: Fix 'Simple expression parser' test on arch without CPU die topology info
Thomas Richter [Mon, 29 Nov 2021 11:23:39 +0000 (12:23 +0100)]
perf test: Fix 'Simple expression parser' test on arch without CPU die topology info

Some platforms do not have CPU die support, for example s390.

Commit
Cc: Ian Rogers <irogers@google.com>
Fixes: fdf1e29b6118c18f ("perf expr: Add metric literals for topology.")
fails on s390:

  # perf test -Fv 7
    ...
  # FAILED tests/expr.c:173 #num_dies >= #num_packages
    ---- end ----
    Simple expression parser: FAILED!
  #

Investigating this issue leads to these functions:

 build_cpu_topology()
   +--> has_die_topology(void)
        {
           struct utsname uts;

           if (uname(&uts) < 0)
                  return false;
           if (strncmp(uts.machine, "x86_64", 6))
                  return false;
           ....
        }

which always returns false on s390. The caller build_cpu_topology()
checks has_die_topology() return value. On false the the struct
cpu_topology::die_cpu_list is not contructed and has zero entries. This
leads to the failing comparison: #num_dies >= #num_packages.  s390 of
course has a positive number of packages.

Fix this and check if the function build_cpu_topology() did build up
a die_cpus_list. The number of entries in this list should be larger
than 0. If the number of list element is zero, the die_cpus_list has
not been created and the check in function test__expr():

    TEST_ASSERT_VAL("#num_dies >= #num_packages", \
    num_dies >= num_packages)

always fails.

Output after:

  # perf test -Fv 7
   7: Simple expression parser                                        :
   --- start ---
   division by zero
   syntax error
   ---- end ----
   Simple expression parser: Ok
  #

Fixes: fdf1e29b6118c18f ("perf expr: Add metric literals for topology.")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20211129112339.3003036-1-tmricht@linux.ibm.com
[ Added comment in the added 'if (num_dies)' line about architectures not having die topology ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agotools build: Remove needless libpython-version feature check that breaks test-all...
Arnaldo Carvalho de Melo [Tue, 30 Nov 2021 13:12:41 +0000 (10:12 -0300)]
tools build: Remove needless libpython-version feature check that breaks test-all fast path

Since 66dfdff03d196e51 ("perf tools: Add Python 3 support") we don't use
the tools/build/feature/test-libpython-version.c version in any Makefile
feature check:

  $ find tools/ -type f | xargs grep feature-libpython-version
  $

The only place where this was used was removed in 66dfdff03d196e51:

  -        ifneq ($(feature-libpython-version), 1)
  -          $(warning Python 3 is not yet supported; please set)
  -          $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
  -          $(warning If you also have Python 2 installed, then)
  -          $(warning try something like:)
  -          $(warning $(and ,))
  -          $(warning $(and ,)  make PYTHON=python2)
  -          $(warning $(and ,))
  -          $(warning Otherwise, disable Python support entirely:)
  -          $(warning $(and ,))
  -          $(warning $(and ,)  make NO_LIBPYTHON=1)
  -          $(warning $(and ,))
  -          $(error   $(and ,))
  -        else
  -          LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
  -          EXTLIBS += $(PYTHON_EMBED_LIBADD)
  -          LANG_BINDINGS += $(obj-perf)python/perf.so
  -          $(call detected,CONFIG_LIBPYTHON)
  -        endif

And nowadays we either build with PYTHON=python3 or just install the
python3 devel packages and perf will build against it.

But the leftover feature-libpython-version check made the fast path
feature detection to break in all cases except when python2 devel files
were installed:

  $ rpm -qa | grep python.*devel
  python3-devel-3.9.7-1.fc34.x86_64
  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;
  $ make -C tools/perf O=/tmp/build/perf install-bin
  make: Entering directory '/var/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j32' parallel build
    HOSTCC  /tmp/build/perf/fixdep.o
  <SNIP>
  $ cat /tmp/build/perf/feature/test-all.make.output
  In file included from test-all.c:18:
  test-libpython-version.c:5:10: error: #error
      5 |         #error
        |          ^~~~~
  $ ldd ~/bin/perf | grep python
libpython3.9.so.1.0 => /lib64/libpython3.9.so.1.0 (0x00007fda6dbcf000)
  $

As python3 is the norm these days, fix this by just removing the unused
feature-libpython-version feature check, making the test-all fast path
to work with the common case.

With this:

  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;
  $ make -C tools/perf O=/tmp/build/perf install-bin |& head
  make: Entering directory '/var/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j32' parallel build
    HOSTCC  /tmp/build/perf/fixdep.o
    HOSTLD  /tmp/build/perf/fixdep-in.o
    LINK    /tmp/build/perf/fixdep

  Auto-detecting system features:
  ...                         dwarf: [ on  ]
  ...            dwarf_getlocations: [ on  ]
  ...                         glibc: [ on  ]
  $ ldd ~/bin/perf | grep python
libpython3.9.so.1.0 => /lib64/libpython3.9.so.1.0 (0x00007f58800b0000)
  $ cat /tmp/build/perf/feature/test-all.make.output
  $

Reviewed-by: James Clark <james.clark@arm.com>
Fixes: 66dfdff03d196e51 ("perf tools: Add Python 3 support")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jaroslav Škarvada <jskarvad@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/YaYmeeC6CS2b8OSz@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoperf tools: Fix SMT detection fast read path
Ian Rogers [Wed, 24 Nov 2021 00:12:29 +0000 (16:12 -0800)]
perf tools: Fix SMT detection fast read path

sysfs__read_int() returns 0 on success, and so the fast read path was
always failing.

Fixes: bb629484d924118e ("perf tools: Simplify checking if SMT is active.")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211124001231.3277836-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agotools headers UAPI: Sync powerpc syscall table file changed by new futex_waitv syscall
Arnaldo Carvalho de Melo [Wed, 8 Sep 2021 19:09:08 +0000 (16:09 -0300)]
tools headers UAPI: Sync powerpc syscall table file changed by new futex_waitv syscall

To pick the changes in this cset:

  a0eb2da92b715d0c ("futex: Wireup futex_waitv syscall")

That add support for this new syscall in tools such as 'perf trace'.

For instance, this is now possible (adapted from the x86_64 test output):

  # perf trace -e futex_waitv
  ^C#
  # perf trace -v -e futex_waitv
  event qualifier tracepoint filter: (common_pid != 807333 && common_pid != 3564) && (id == 449)
  ^C#
  # perf trace -v -e futex* --max-events 10
  event qualifier tracepoint filter: (common_pid != 812168 && common_pid != 3564) && (id == 221 || id == 449)
  mmap size 528384B
           ? (         ): Timer/219310  ... [continued]: futex())                                            = -1 ETIMEDOUT (Connection timed out)
       0.012 ( 0.002 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.024 ( 0.060 ms): Timer/219310 futex(uaddr: 0x7fd0b152d420, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) = 0
       0.086 ( 0.001 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.088 (         ): Timer/219310 futex(uaddr: 0x7fd0b152d424, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) ...
       0.075 ( 0.005 ms): Web Content/219299 futex(uaddr: 0x7fd0b152d420, op: WAKE|PRIVATE_FLAG, val: 1)     = 1
       0.169 ( 0.004 ms): Web Content/219299 futex(uaddr: 0x7fd0b152d424, op: WAKE|PRIVATE_FLAG, val: 1)     = 1
       0.088 ( 0.089 ms): Timer/219310  ... [continued]: futex())                                            = 0
       0.179 ( 0.001 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.181 (         ): Timer/219310 futex(uaddr: 0x7fd0b152d420, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) ...
  #

That is the filter expression attached to the raw_syscalls:sys_{enter,exit}
tracepoints.

  $ grep futex tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
  221 32 futex sys_futex_time32
  221 64 futex sys_futex
  221 spu futex sys_futex
  422 32 futex_time64 sys_futex sys_futex
  449 common  futex_waitv                     sys_futex_waitv
  $

This addresses this perf build warnings:

  Warning: Kernel ABI header at 'tools/perf/arch/powerpc/entry/syscalls/syscall.tbl' differs from latest version at 'arch/powerpc/kernel/syscalls/syscall.tbl'
  diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl

Reviewed-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Cc: André Almeida <andrealmeid@collabora.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/YZ%2F1OU9mJuyS2HMa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoperf inject: Fix itrace space allowed for new attributes
Adrian Hunter [Thu, 25 Nov 2021 07:14:57 +0000 (09:14 +0200)]
perf inject: Fix itrace space allowed for new attributes

The space allowed for new attributes can be too small if existing header
information is large. That can happen, for example, if there are very
many CPUs, due to having an event ID per CPU per event being stored in the
header information.

Fix by adding the existing header.data_offset. Also increase the extra
space allowed to 8KiB and align to a 4KiB boundary for neatness.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20211125071457.2066863-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agotools headers UAPI: Sync s390 syscall table file changed by new futex_waitv syscall
Arnaldo Carvalho de Melo [Wed, 8 Sep 2021 19:09:08 +0000 (16:09 -0300)]
tools headers UAPI: Sync s390 syscall table file changed by new futex_waitv syscall

To pick the changes in these csets:

  6c122360cf2f4c5a ("s390: wire up sys_futex_waitv system call")

That add support for this new syscall in tools such as 'perf trace'.

For instance, this is now possible (adapted from the x86_64 test output):

  # perf trace -e futex_waitv
  ^C#
  # perf trace -v -e futex_waitv
  event qualifier tracepoint filter: (common_pid != 807333 && common_pid != 3564) && (id == 449)
  ^C#
  # perf trace -v -e futex* --max-events 10
  event qualifier tracepoint filter: (common_pid != 812168 && common_pid != 3564) && (id == 238 || id == 449)
           ? (         ): Timer/219310  ... [continued]: futex())                                            = -1 ETIMEDOUT (Connection timed out)
       0.012 ( 0.002 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.024 ( 0.060 ms): Timer/219310 futex(uaddr: 0x7fd0b152d420, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) = 0
       0.086 ( 0.001 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.088 (         ): Timer/219310 futex(uaddr: 0x7fd0b152d424, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) ...
       0.075 ( 0.005 ms): Web Content/219299 futex(uaddr: 0x7fd0b152d420, op: WAKE|PRIVATE_FLAG, val: 1)     = 1
       0.169 ( 0.004 ms): Web Content/219299 futex(uaddr: 0x7fd0b152d424, op: WAKE|PRIVATE_FLAG, val: 1)     = 1
       0.088 ( 0.089 ms): Timer/219310  ... [continued]: futex())                                            = 0
       0.179 ( 0.001 ms): Timer/219310 futex(uaddr: 0x7fd0b152d3c8, op: WAKE|PRIVATE_FLAG, val: 1)           = 0
       0.181 (         ): Timer/219310 futex(uaddr: 0x7fd0b152d420, op: WAIT_BITSET|PRIVATE_FLAG, utime: 0x7fd0b1657840, val3: MATCH_ANY) ...
  #

That is the filter expression attached to the raw_syscalls:sys_{enter,exit}
tracepoints.

  $ grep futex tools/perf/arch/s390/entry/syscalls/syscall.tbl
  238  common futex sys_futex sys_futex_time32
  422 32 futex_time64 - sys_futex
  449  common futex_waitv sys_futex_waitv sys_futex_waitv
  $

This addresses this perf build warnings:

  Warning: Kernel ABI header at 'tools/perf/arch/s390/entry/syscalls/syscall.tbl' differs from latest version at 'arch/s390/kernel/syscalls/syscall.tbl'
  diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: https://lore.kernel.org/lkml/YZ%2F2qRW%2FTScYTP1U@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoRevert "perf bench: Fix two memory leaks detected with ASan"
Jiri Olsa [Mon, 22 Nov 2021 13:11:05 +0000 (10:11 -0300)]
Revert "perf bench: Fix two memory leaks detected with ASan"

This: This reverts commit 92723ea0f11d92496687db8c9725248e9d1e5e1d.

  # perf test 91
  91: perf stat --bpf-counters test           :RRRRRRRRRRRRR FAILED!
  # perf test 91
  91: perf stat --bpf-counters test           :RRRRRRRRRRRRR FAILED!
  # perf test 91
  91: perf stat --bpf-counters test           :RRRRRRRRRRRR FAILED!
  # perf test 91
  91: perf stat --bpf-counters test           :RRRRRRRRRRRRRRRRRR Ok
  # perf test 91
  91: perf stat --bpf-counters test           :RRRRRRRRR FAILED!
  # perf test 91
  91: perf stat --bpf-counters test           :RRRRRRRRRRR Ok
  # perf test 91
  91: perf stat --bpf-counters test           :RRRRRRRRRRRRRRR Ok

yep, it seems the perf bench is broken so the counts won't correlated if
I revert this one:

  92723ea0f11d perf bench: Fix two memory leaks detected with ASan

it works for me again.. it seems to break -t option

   [root@dell-r440-01 perf]# ./perf bench sched messaging -g 1 -l 100 -t
   # Running 'sched/messaging' benchmark:
   RRRperf: CLIENT: ready write: Bad file descriptor
   Rperf: SENDER: write: Bad file descriptor

Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Cc: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/lkml/YZev7KClb%2Fud43Lc@krava/
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoMakefile: Do not quote value for CONFIG_CC_IMPLICIT_FALLTHROUGH
Salvatore Bonaccorso [Mon, 6 Dec 2021 20:42:01 +0000 (21:42 +0100)]
Makefile: Do not quote value for CONFIG_CC_IMPLICIT_FALLTHROUGH

Andreas reported that a specific build environment for an external
module, being a bit broken, does pass CC_IMPLICIT_FALLTHROUGH quoted as
argument to gcc, causing an error

  gcc-11: error: "-Wimplicit-fallthrough=5": linker input file not found: No such file or directory

Until this is more generally fixed as outlined in [1], by fixing
scripts/link-vmlinux.sh, scripts/gen_autoksyms.sh, etc to not directly
include the include/config/auto.conf, and in a second step, change
Kconfig to generate the auto.conf without "", workaround the issue by
explicitly unquoting CC_IMPLICIT_FALLTHROUGH.

Reported-by: Andreas Beckmann <anbe@debian.org>
Link: https://bugs.debian.org/1001083
Link: https://lore.kernel.org/linux-kbuild/CAK7LNAR-VXwHFEJqCcrFDZj+_4+Xd6oynbj_0eS8N504_ydmyw@mail.gmail.com/
Signed-off-by: Salvatore Bonaccorso <carnil@debian.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoplatform/x86/intel: hid: add quirk to support Surface Go 3
Alex Hung [Fri, 3 Dec 2021 21:28:10 +0000 (14:28 -0700)]
platform/x86/intel: hid: add quirk to support Surface Go 3

Similar to other systems Surface Go 3 requires a DMI quirk to enable
5 button array for power and volume buttons.

Buglink: https://github.com/linux-surface/linux-surface/issues/595
Cc: stable@vger.kernel.org
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Link: https://lore.kernel.org/r/20211203212810.2666508-1-alex.hung@canonical.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
3 years agoMerge tag 'docs-5.16-3' of git://git.lwn.net/linux
Linus Torvalds [Mon, 6 Dec 2021 18:46:20 +0000 (10:46 -0800)]
Merge tag 'docs-5.16-3' of git://git.lwn.net/linux

Pull documentation fixes from Jonathan Corbet:
 "A few important documentation fixes, including breakage that comes
  with v1.0 of the ReadTheDocs theme"

* tag 'docs-5.16-3' of git://git.lwn.net/linux:
  Documentation: Add minimum pahole version
  Documentation/process: fix self reference
  docs: admin-guide/blockdev: Remove digraph of node-states
  docs: conf.py: fix support for Readthedocs v 1.0.0

3 years agoMerge tag 'spi-fix-v5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brooni...
Linus Torvalds [Mon, 6 Dec 2021 18:22:12 +0000 (10:22 -0800)]
Merge tag 'spi-fix-v5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fix from Mark Brown:
 "Just one trivial update adding a device ID to the DT bindings"

* tag 'spi-fix-v5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spi-rockchip: Add rk3568-spi compatible

3 years agoMerge tag 'regulator-fix-v5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 6 Dec 2021 18:14:12 +0000 (10:14 -0800)]
Merge tag 'regulator-fix-v5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "Documentation fix for v5.17.

  A fix for bitrot in the documentation for protection interrupts that
  crept in as the code was revised during review"

* tag 'regulator-fix-v5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: Update protection IRQ helper docs

3 years agoMerge tag 'efi-urgent-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 6 Dec 2021 18:09:00 +0000 (10:09 -0800)]
Merge tag 'efi-urgent-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi

Pull EFI fix from Ard Biesheuvel:
 "Ensure that the EFI memory map resides in encrypted memory even after
  it has been reallocated"

* tag 'efi-urgent-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  x86/sme: Explicitly map new EFI memmap table as encrypted

3 years agoLinux 5.16-rc4
Linus Torvalds [Sun, 5 Dec 2021 22:08:22 +0000 (14:08 -0800)]
Linux 5.16-rc4

3 years agoMerge tag 'for-5.16/parisc-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sun, 5 Dec 2021 20:58:18 +0000 (12:58 -0800)]
Merge tag 'for-5.16/parisc-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:
 "Some bug and warning fixes:

   - Fix "make install" to use debians "installkernel" script which is
     now in /usr/sbin

   - Fix the bindeb-pkg make target by giving the correct KBUILD_IMAGE
     file name

   - Fix compiler warnings by annotating parisc agp init functions with
     __init

   - Fix timekeeping on SMP machines with dual-core CPUs

   - Enable some more config options in the 64-bit defconfig"

* tag 'for-5.16/parisc-6' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Mark cr16 CPU clocksource unstable on all SMP machines
  parisc: Fix "make install" on newer debian releases
  parisc/agp: Annotate parisc agp init functions with __init
  parisc: Enable sata sil, audit and usb support on 64-bit defconfig
  parisc: Fix KBUILD_IMAGE for self-extracting kernel

3 years agoMerge tag 'usb-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sun, 5 Dec 2021 17:34:57 +0000 (09:34 -0800)]
Merge tag 'usb-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for a few reported issues. Included in
  here are:

   - xhci fix for a _much_ reported regression. I don't think there's a
     community distro that has not reported this problem yet :(

   - new USB quirk addition

   - cdns3 minor fixes

   - typec regression fix.

  All of these have been in linux-next with no reported problems, and
  the xhci fix has been reported by many to resolve their reported
  problem"

* tag 'usb-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()
  usb: cdns3: gadget: fix new urb never complete if ep cancel previous requests
  usb: typec: tcpm: Wait in SNK_DEBOUNCED until disconnect
  USB: NO_LPM quirk Lenovo Powered USB-C Travel Hub
  xhci: Fix commad ring abort, write all 64 bits to CRCR register.

3 years agoMerge tag 'tty-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sun, 5 Dec 2021 17:13:20 +0000 (09:13 -0800)]
Merge tag 'tty-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are some small TTY and Serial driver fixes for 5.16-rc4 to
  resolve a number of reported problems.

  They include:

   - liteuart serial driver fixes

   - 8250_pci serial driver fixes for pericom devices

   - 8250 RTS line control fix while in RS-485 mode

   - tegra serial driver fix

   - msm_serial driver fix

   - pl011 serial driver new id

   - fsl_lpuart revert of broken change

   - 8250_bcm7271 serial driver fix

   - MAINTAINERS file update for rpmsg tty driver that came in 5.16-rc1

   - vgacon fix for reported problem

  All of these, except for the 8250_bcm7271 fix have been in linux-next
  with no reported problem. The 8250_bcm7271 fix was added to the tree
  on Friday so no chance to be linux-next yet. But it should be fine as
  the affected developers submitted it"

* tag 'tty-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250_bcm7271: UART errors after resuming from S2
  serial: 8250_pci: rewrite pericom_do_set_divisor()
  serial: 8250_pci: Fix ACCES entries in pci_serial_quirks array
  serial: 8250: Fix RTS modem control while in rs485 mode
  Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP"
  serial: tegra: Change lower tolerance baud rate limit for tegra20 and tegra30
  serial: liteuart: relax compile-test dependencies
  serial: liteuart: fix minor-number leak on probe errors
  serial: liteuart: fix use-after-free and memleak on unbind
  serial: liteuart: Fix NULL pointer dereference in ->remove()
  vgacon: Propagate console boot parameters before calling `vc_resize'
  tty: serial: msm_serial: Deactivate RX DMA for polling support
  serial: pl011: Add ACPI SBSA UART match id
  serial: core: fix transmit-buffer reset and memleak
  MAINTAINERS: Add rpmsg tty driver maintainer

3 years agoMerge tag 'timers_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 5 Dec 2021 16:58:52 +0000 (08:58 -0800)]
Merge tag 'timers_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer fix from Borislav Petkov:

 - Prevent a tick storm when a dedicated timekeeper CPU in nohz_full
   mode runs for prolonged periods with interrupts disabled and ends up
   programming the next tick in the past, leading to that storm

* tag 'timers_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timers/nohz: Last resort update jiffies on nohz_full IRQ entry

3 years agoMerge tag 'sched_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 5 Dec 2021 16:53:31 +0000 (08:53 -0800)]
Merge tag 'sched_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fixes from Borislav Petkov:

 - Properly init uclamp_flags of a runqueue, on first enqueuing

 - Fix preempt= callback return values

 - Correct utime/stime resource usage reporting on nohz_full to return
   the proper times instead of shorter ones

* tag 'sched_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/uclamp: Fix rq->uclamp_max not set on first enqueue
  preempt/dynamic: Fix setup_preempt_mode() return value
  sched/cputime: Fix getrusage(RUSAGE_THREAD) with nohz_full

3 years agoMerge tag 'x86_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 5 Dec 2021 16:43:35 +0000 (08:43 -0800)]
Merge tag 'x86_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Fix a couple of SWAPGS fencing issues in the x86 entry code

 - Use the proper operand types in __{get,put}_user() to prevent
   truncation in SEV-ES string io

 - Make sure the kernel mappings are present in trampoline_pgd in order
   to prevent any potential accesses to unmapped memory after switching
   to it

 - Fix a trivial list corruption in objtool's pv_ops validation

 - Disable the clocksource watchdog for TSC on platforms which claim
   that the TSC is constant, doesn't stop in sleep states, CPU has TSC
   adjust and the number of sockets of the platform are max 2, to
   prevent erroneous markings of the TSC as unstable.

 - Make sure TSC adjust is always checked not only when going idle

 - Prevent a stack leak by initializing struct _fpx_sw_bytes properly in
   the FPU code

 - Fix INTEL_FAM6_RAPTORLAKE define naming to adhere to the convention

* tag 'x86_urgent_for_v5.16_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/xen: Add xenpv_restore_regs_and_return_to_usermode()
  x86/entry: Use the correct fence macro after swapgs in kernel CR3
  x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry()
  x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword
  x86/64/mm: Map all kernel memory into trampoline_pgd
  objtool: Fix pv_ops noinstr validation
  x86/tsc: Disable clocksource watchdog for TSC on qualified platorms
  x86/tsc: Add a timer to make sure TSC_adjust is always checked
  x86/fpu/signal: Initialize sw_bytes in save_xstate_epilog()
  x86/cpu: Drop spurious underscore from RAPTOR_LAKE #define

3 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 5 Dec 2021 16:25:33 +0000 (08:25 -0800)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull more kvm fixes from Paolo Bonzini:

 - Static analysis fix

 - New SEV-ES protocol for communicating invalid VMGEXIT requests

 - Ensure APICv is considered inactive if there is no APIC

 - Fix reserved bits for AMD PerfEvtSeln register

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure
  KVM: SEV: Fall back to vmalloc for SEV-ES scratch area if necessary
  KVM: SEV: Return appropriate error codes if SEV-ES scratch setup fails
  KVM: x86/mmu: Retry page fault if root is invalidated by memslot update
  KVM: VMX: Set failure code in prepare_vmcs02()
  KVM: ensure APICv is considered inactive if there is no APIC
  KVM: x86/pmu: Fix reserved bits for AMD PerfEvtSeln register

3 years agox86/sme: Explicitly map new EFI memmap table as encrypted
Tom Lendacky [Wed, 20 Oct 2021 18:02:11 +0000 (13:02 -0500)]
x86/sme: Explicitly map new EFI memmap table as encrypted

Reserving memory using efi_mem_reserve() calls into the x86
efi_arch_mem_reserve() function. This function will insert a new EFI
memory descriptor into the EFI memory map representing the area of
memory to be reserved and marking it as EFI runtime memory. As part
of adding this new entry, a new EFI memory map is allocated and mapped.
The mapping is where a problem can occur. This new memory map is mapped
using early_memremap() and generally mapped encrypted, unless the new
memory for the mapping happens to come from an area of memory that is
marked as EFI_BOOT_SERVICES_DATA memory. In this case, the new memory will
be mapped unencrypted. However, during replacement of the old memory map,
efi_mem_type() is disabled, so the new memory map will now be long-term
mapped encrypted (in efi.memmap), resulting in the map containing invalid
data and causing the kernel boot to crash.

Since it is known that the area will be mapped encrypted going forward,
explicitly map the new memory map as encrypted using early_memremap_prot().

Cc: <stable@vger.kernel.org> # 4.14.x
Fixes: 8f716c9b5feb ("x86/mm: Add support to access boot related data in the clear")
Link: https://lore.kernel.org/all/ebf1eb2940405438a09d51d121ec0d02c8755558.1634752931.git.thomas.lendacky@amd.com/
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
[ardb: incorporate Kconfig fix by Arnd]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
3 years agoKVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure
Tom Lendacky [Thu, 2 Dec 2021 18:52:05 +0000 (12:52 -0600)]
KVM: SVM: Do not terminate SEV-ES guests on GHCB validation failure

Currently, an SEV-ES guest is terminated if the validation of the VMGEXIT
exit code or exit parameters fails.

The VMGEXIT instruction can be issued from userspace, even though
userspace (likely) can't update the GHCB. To prevent userspace from being
able to kill the guest, return an error through the GHCB when validation
fails rather than terminating the guest. For cases where the GHCB can't be
updated (e.g. the GHCB can't be mapped, etc.), just return back to the
guest.

The new error codes are documented in the lasest update to the GHCB
specification.

Fixes: 291bd20d5d88 ("KVM: SVM: Add initial support for a VMGEXIT VMEXIT")
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <b57280b5562893e2616257ac9c2d4525a9aeeb42.1638471124.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
3 years agoKVM: SEV: Fall back to vmalloc for SEV-ES scratch area if necessary
Sean Christopherson [Tue, 9 Nov 2021 22:23:50 +0000 (22:23 +0000)]
KVM: SEV: Fall back to vmalloc for SEV-ES scratch area if necessary

Use kvzalloc() to allocate KVM's buffer for SEV-ES's GHCB scratch area so
that KVM falls back to __vmalloc() if physically contiguous memory isn't
available.  The buffer is purely a KVM software construct, i.e. there's
no need for it to be physically contiguous.

Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211109222350.2266045-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
3 years agoKVM: SEV: Return appropriate error codes if SEV-ES scratch setup fails
Sean Christopherson [Tue, 9 Nov 2021 22:23:49 +0000 (22:23 +0000)]
KVM: SEV: Return appropriate error codes if SEV-ES scratch setup fails

Return appropriate error codes if setting up the GHCB scratch area for an
SEV-ES guest fails.  In particular, returning -EINVAL instead of -ENOMEM
when allocating the kernel buffer could be confusing as userspace would
likely suspect a guest issue.

Fixes: 8f423a80d299 ("KVM: SVM: Support MMIO for an SEV-ES guest")
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211109222350.2266045-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
3 years agoMerge tag 'xfs-5.16-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Sun, 5 Dec 2021 01:22:53 +0000 (17:22 -0800)]
Merge tag 'xfs-5.16-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fix from Darrick Wong:
 "Remove an unnecessary (and backwards) rename flags check that
  duplicates a VFS level check"

* tag 'xfs-5.16-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: remove incorrect ASSERT in xfs_rename

3 years agoMerge tag '5.16-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 4 Dec 2021 21:43:52 +0000 (13:43 -0800)]
Merge tag '5.16-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Three SMB3 multichannel/fscache fixes and a DFS fix.

  In testing multichannel reconnect scenarios recently various problems
  with the cifs.ko implementation of fscache were found (e.g. incorrect
  initialization of fscache cookies in some cases)"

* tag '5.16-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: avoid use of dstaddr as key for fscache client cookie
  cifs: add server conn_id to fscache client cookie
  cifs: wait for tcon resource_id before getting fscache super
  cifs: fix missed refcounting of ipc tcon

3 years agoparisc: Mark cr16 CPU clocksource unstable on all SMP machines
Helge Deller [Sat, 4 Dec 2021 20:21:46 +0000 (21:21 +0100)]
parisc: Mark cr16 CPU clocksource unstable on all SMP machines

In commit c8c3735997a3 ("parisc: Enhance detection of synchronous cr16
clocksources") I assumed that CPUs on the same physical core are syncronous.
While booting up the kernel on two different C8000 machines, one with a
dual-core PA8800 and one with a dual-core PA8900 CPU, this turned out to be
wrong. The symptom was that I saw a jump in the internal clocks printed to the
syslog and strange overall behaviour.  On machines which have 4 cores (2
dual-cores) the problem isn't visible, because the current logic already marked
the cr16 clocksource unstable in this case.

This patch now marks the cr16 interval timers unstable if we have more than one
CPU in the system, and it fixes this issue.

Fixes: c8c3735997a3 ("parisc: Enhance detection of synchronous cr16 clocksources")
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v5.15+
3 years agoparisc: Fix "make install" on newer debian releases
Helge Deller [Sat, 4 Dec 2021 20:14:40 +0000 (21:14 +0100)]
parisc: Fix "make install" on newer debian releases

On newer debian releases the debian-provided "installkernel" script is
installed in /usr/sbin. Fix the kernel install.sh script to look for the
script in this directory as well.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v3.13+
3 years agoMerge tag 'block-5.16-2021-12-03' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 4 Dec 2021 16:38:25 +0000 (08:38 -0800)]
Merge tag 'block-5.16-2021-12-03' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "A single fix for repeated printk spam from loop"

* tag 'block-5.16-2021-12-03' of git://git.kernel.dk/linux-block:
  loop: Use pr_warn_once() for loop_control_remove() warning

3 years agoMerge tag 'io_uring-5.16-2021-12-03' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 4 Dec 2021 16:34:59 +0000 (08:34 -0800)]
Merge tag 'io_uring-5.16-2021-12-03' of git://git.kernel.dk/linux-block

Pull io_uring fix from Jens Axboe:
 "Just a single fix preventing repeated retries of task_work based io-wq
  thread creation, fixing a regression from when io-wq was made more (a
  bit too much) resilient against signals"

* tag 'io_uring-5.16-2021-12-03' of git://git.kernel.dk/linux-block:
  io-wq: don't retry task_work creation failure on fatal conditions

3 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 4 Dec 2021 16:28:42 +0000 (08:28 -0800)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two patches, both in drivers.

  One is a fix to FC recovery (lpfc) and the other is an enhancement to
  support the Intel Alder Motherboard with the UFS driver which comes
  under the -rc exception process for hardware enabling"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: ufs-pci: Add support for Intel ADL
  scsi: lpfc: Fix non-recovery of remote ports following an unsolicited LOGO

3 years agoMerge tag 'gfs2-v5.16-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 4 Dec 2021 16:13:20 +0000 (08:13 -0800)]
Merge tag 'gfs2-v5.16-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fixes from Andreas Gruenbacher:

 - Since commit 486408d690e1 ("gfs2: Cancel remote delete work
   asynchronously"), inode create and lookup-by-number can overlap more
   easily and we can end up with temporary duplicate inodes. Fix the
   code to prevent that.

 - Fix a BUG demoting weak glock holders from a remote node.

* tag 'gfs2-v5.16-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: gfs2_create_inode rework
  gfs2: gfs2_inode_lookup rework
  gfs2: gfs2_inode_lookup cleanup
  gfs2: Fix remote demote of weak glock holders

3 years agosched/uclamp: Fix rq->uclamp_max not set on first enqueue
Qais Yousef [Thu, 2 Dec 2021 11:20:33 +0000 (11:20 +0000)]
sched/uclamp: Fix rq->uclamp_max not set on first enqueue

Commit d81ae8aac85c ("sched/uclamp: Fix initialization of struct
uclamp_rq") introduced a bug where uclamp_max of the rq is not reset to
match the woken up task's uclamp_max when the rq is idle.

The code was relying on rq->uclamp_max initialized to zero, so on first
enqueue

static inline void uclamp_rq_inc_id(struct rq *rq, struct task_struct *p,
    enum uclamp_id clamp_id)
{
...

if (uc_se->value > READ_ONCE(uc_rq->value))
WRITE_ONCE(uc_rq->value, uc_se->value);
}

was actually resetting it. But since commit d81ae8aac85c changed the
default to 1024, this no longer works. And since rq->uclamp_flags is
also initialized to 0, neither above code path nor uclamp_idle_reset()
update the rq->uclamp_max on first wake up from idle.

This is only visible from first wake up(s) until the first dequeue to
idle after enabling the static key. And it only matters if the
uclamp_max of this task is < 1024 since only then its uclamp_max will be
effectively ignored.

Fix it by properly initializing rq->uclamp_flags = UCLAMP_FLAG_IDLE to
ensure uclamp_idle_reset() is called which then will update the rq
uclamp_max value as expected.

Fixes: d81ae8aac85c ("sched/uclamp: Fix initialization of struct uclamp_rq")
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <Valentin.Schneider@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lkml.kernel.org/r/20211202112033.1705279-1-qais.yousef@arm.com
3 years agopreempt/dynamic: Fix setup_preempt_mode() return value
Andrew Halaney [Fri, 3 Dec 2021 23:32:03 +0000 (17:32 -0600)]
preempt/dynamic: Fix setup_preempt_mode() return value

__setup() callbacks expect 1 for success and 0 for failure. Correct the
usage here to reflect that.

Fixes: 826bfeb37bb4 ("preempt/dynamic: Support dynamic preempt with preempt= boot option")
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211203233203.133581-1-ahalaney@redhat.com
3 years agoMerge tag 'vfio-v5.16-rc4' of git://github.com/awilliam/linux-vfio
Linus Torvalds [Fri, 3 Dec 2021 20:27:08 +0000 (12:27 -0800)]
Merge tag 'vfio-v5.16-rc4' of git://github.com/awilliam/linux-vfio

Pull VFIO fixes from Alex Williamson:

 - Fix OpRegion pointer arithmetic (Zhenyu Wang)

 - Fix comment format triggering kernel-doc warnings (Randy Dunlap)

* tag 'vfio-v5.16-rc4' of git://github.com/awilliam/linux-vfio:
  vfio/pci: Fix OpRegion read
  vfio: remove all kernel-doc notation

3 years agoMerge tag 'pm-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 3 Dec 2021 20:22:56 +0000 (12:22 -0800)]
Merge tag 'pm-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a CPU hot-add issue in the cpufreq core, fix a comment in
  the cpufreq core code and update its documentation, and disable the
  DTPM (Dynamic Thermal Power Management) code for the time being to
  prevent it from causing issues to appear.

  Specifics:

   - Disable DTPM for this cycle to prevent it from causing issues to
     appear on otherwise functional systems (Daniel Lezcano)

   - Fix cpufreq sysfs interface failure related to physical CPU hot-add
     (Xiongfeng Wang)

   - Fix comment in cpufreq core and update its documentation (Tang
     Yizhou)"

* tag 'pm-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  powercap: DTPM: Drop unused local variable from init_dtpm()
  cpufreq: docs: Update core.rst
  cpufreq: Fix a comment in cpufreq_policy_free
  powercap/drivers/dtpm: Disable DTPM at boot time
  cpufreq: Fix get_cpu_device() failure in add_cpu_dev_symlink()

3 years agoMerge tag 's390-5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Fri, 3 Dec 2021 19:46:20 +0000 (11:46 -0800)]
Merge tag 's390-5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - Fix potential overlap of pseudo-MMIO addresses with MIO addresses

 - Fix stack unwinder test case inline assembly compile error that
   happens with LLVM's integrated assembler

 - Update defconfigs

* tag 's390-5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: update defconfigs
  s390/pci: move pseudo-MMIO to prevent MIO overlap
  s390/test_unwind: use raw opcode instead of invalid instruction

3 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 3 Dec 2021 18:50:14 +0000 (10:50 -0800)]
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Three arm64 fixes for -rc4.

  One of them is just a trivial documentation fix, whereas the other two
  address a warning in the kexec code and a crash in ftrace on systems
  implementing BTI.

  The latter patch has a couple of ugly ifdefs which Mark plans to clean
  up separately, but as-is the patch is straightforward for backporting
  to stable kernels.

  Summary:

   - Add missing BTI landing instructions to the ftrace*_caller
     trampolines

   - Fix kexec() WARN when DEBUG_VIRTUAL is enabled

   - Fix PAC documentation by removing stale references to compiler
     flags"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: ftrace: add missing BTIs
  arm64: kexec: use __pa_symbol(empty_zero_page)
  arm64: update PAC description for kernel

3 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Fri, 3 Dec 2021 18:44:16 +0000 (10:44 -0800)]
Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "I2C has another set of driver bugfixes, mostly for the stm32f7 driver"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: rk3x: Handle a spurious start completion interrupt flag
  i2c: stm32f7: use proper DMAENGINE API for termination
  i2c: stm32f7: stop dma transfer in case of NACK
  i2c: stm32f7: recover the bus on access timeout
  i2c: stm32f7: flush TX FIFO upon transfer errors
  i2c: cbus-gpio: set atomic transfer callback

3 years agoMerge tag 'libata-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal...
Linus Torvalds [Fri, 3 Dec 2021 18:38:45 +0000 (10:38 -0800)]
Merge tag 'libata-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata

Pull libata fixes from Damien Le Moal:
 "Two sparse warning fixes and a couple of patches to fix an issue with
  sata_fsl driver module removal:

   - A couple of patches to avoid sparse warnings in libata-sata and in
     the pata_falcon driver (from Yang and Finn).

   - A couple of sata_fsl driver patches fixing IRQ free and proc
     unregister on module removal (from Baokun)"

* tag 'libata-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  ata: replace snprintf in show functions with sysfs_emit
  sata_fsl: fix warning in remove_proc_entry when rmmod sata_fsl
  sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl
  pata_falcon: Avoid type warnings from sparse

3 years agocifs: avoid use of dstaddr as key for fscache client cookie
Shyam Prasad N [Thu, 2 Dec 2021 07:46:54 +0000 (07:46 +0000)]
cifs: avoid use of dstaddr as key for fscache client cookie

server->dstaddr can change when the DNS mapping for the
server hostname changes. But conn_id is a u64 counter
that is incremented each time a new TCP connection
is setup. So use only that as a key.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
3 years agocifs: add server conn_id to fscache client cookie
Shyam Prasad N [Thu, 2 Dec 2021 07:30:00 +0000 (07:30 +0000)]
cifs: add server conn_id to fscache client cookie

The fscache client cookie uses the server address
(and port) as the cookie key. This is a problem when
nosharesock is used. Two different connections will
use duplicate cookies. Avoid this by adding
server->conn_id to the key, so that it's guaranteed
that cookie will not be duplicated.

Also, for secondary channels of a session, copy the
fscache pointer from the primary channel. The primary
channel is guaranteed not to go away as long as secondary
channels are in use.  Also addresses minor problem found
by kernel test robot.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
3 years agocifs: wait for tcon resource_id before getting fscache super
Shyam Prasad N [Thu, 2 Dec 2021 07:14:42 +0000 (07:14 +0000)]
cifs: wait for tcon resource_id before getting fscache super

The logic for initializing tcon->resource_id is done inside
cifs_root_iget. fscache super cookie relies on this for aux
data. So we need to push the fscache initialization to this
later point during mount.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
3 years agocifs: fix missed refcounting of ipc tcon
Paulo Alcantara [Thu, 2 Dec 2021 18:29:35 +0000 (15:29 -0300)]
cifs: fix missed refcounting of ipc tcon

Fix missed refcounting of IPC tcon used for getting domain-based DFS
root referrals.  We want to keep it alive as long as mount is active
and can be refreshed.  For standalone DFS root referrals it wouldn't
be a problem as the client ends up having an IPC tcon for both mount
and cache.

Fixes: c88f7dcd6d64 ("cifs: support nested dfs links over reconnect")
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>
3 years agox86/xen: Add xenpv_restore_regs_and_return_to_usermode()
Lai Jiangshan [Fri, 26 Nov 2021 10:11:23 +0000 (18:11 +0800)]
x86/xen: Add xenpv_restore_regs_and_return_to_usermode()

In the native case, PER_CPU_VAR(cpu_tss_rw + TSS_sp0) is the
trampoline stack. But XEN pv doesn't use trampoline stack, so
PER_CPU_VAR(cpu_tss_rw + TSS_sp0) is also the kernel stack.

In that case, source and destination stacks are identical, which means
that reusing swapgs_restore_regs_and_return_to_usermode() in XEN pv
would cause %rsp to move up to the top of the kernel stack and leave the
IRET frame below %rsp.

This is dangerous as it can be corrupted if #NMI / #MC hit as either of
these events occurring in the middle of the stack pushing would clobber
data on the (original) stack.

And, with  XEN pv, swapgs_restore_regs_and_return_to_usermode() pushing
the IRET frame on to the original address is useless and error-prone
when there is any future attempt to modify the code.

 [ bp: Massage commit message. ]

Fixes: 7f2590a110b8 ("x86/entry/64: Use a per-CPU trampoline stack for IDT entries")
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lkml.kernel.org/r/20211126101209.8613-4-jiangshanlai@gmail.com
3 years agox86/entry: Use the correct fence macro after swapgs in kernel CR3
Lai Jiangshan [Fri, 26 Nov 2021 10:11:22 +0000 (18:11 +0800)]
x86/entry: Use the correct fence macro after swapgs in kernel CR3

The commit

  c75890700455 ("x86/entry/64: Remove unneeded kernel CR3 switching")

removed a CR3 write in the faulting path of load_gs_index().

But the path's FENCE_SWAPGS_USER_ENTRY has no fence operation if PTI is
enabled, see spectre_v1_select_mitigation().

Rather, it depended on the serializing CR3 write of SWITCH_TO_KERNEL_CR3
and since it got removed, add a FENCE_SWAPGS_KERNEL_ENTRY call to make
sure speculation is blocked.

 [ bp: Massage commit message and comment. ]

Fixes: c75890700455 ("x86/entry/64: Remove unneeded kernel CR3 switching")
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211126101209.8613-3-jiangshanlai@gmail.com
3 years agofget: check that the fd still exists after getting a ref to it
Linus Torvalds [Wed, 1 Dec 2021 18:06:14 +0000 (10:06 -0800)]
fget: check that the fd still exists after getting a ref to it

Jann Horn points out that there is another possible race wrt Unix domain
socket garbage collection, somewhat reminiscent of the one fixed in
commit cbcf01128d0a ("af_unix: fix garbage collect vs MSG_PEEK").

See the extended comment about the garbage collection requirements added
to unix_peek_fds() by that commit for details.

The race comes from how we can locklessly look up a file descriptor just
as it is in the process of being closed, and with the right artificial
timing (Jann added a few strategic 'mdelay(500)' calls to do that), the
Unix domain socket garbage collector could see the reference count
decrement of the close() happen before fget() took its reference to the
file and the file was attached onto a new file descriptor.

This is all (intentionally) correct on the 'struct file *' side, with
RCU lookups and lockless reference counting very much part of the
design.  Getting that reference count out of order isn't a problem per
se.

But the garbage collector can get confused by seeing this situation of
having seen a file not having any remaining external references and then
seeing it being attached to an fd.

In commit cbcf01128d0a ("af_unix: fix garbage collect vs MSG_PEEK") the
fix was to serialize the file descriptor install with the garbage
collector by taking and releasing the unix_gc_lock.

That's not really an option here, but since this all happens when we are
in the process of looking up a file descriptor, we can instead simply
just re-check that the file hasn't been closed in the meantime, and just
re-do the lookup if we raced with a concurrent close() of the same file
descriptor.

Reported-and-tested-by: Jann Horn <jannh@google.com>
Acked-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agox86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry()
Lai Jiangshan [Fri, 26 Nov 2021 10:11:21 +0000 (18:11 +0800)]
x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry()

Commit

  18ec54fdd6d18 ("x86/speculation: Prepare entry code for Spectre v1 swapgs mitigations")

added FENCE_SWAPGS_{KERNEL|USER}_ENTRY for conditional SWAPGS. In
paranoid_entry(), it uses only FENCE_SWAPGS_KERNEL_ENTRY for both
branches. This is because the fence is required for both cases since the
CR3 write is conditional even when PTI is enabled.

But

  96b2371413e8f ("x86/entry/64: Switch CR3 before SWAPGS in paranoid entry")

changed the order of SWAPGS and the CR3 write. And it missed the needed
FENCE_SWAPGS_KERNEL_ENTRY for the user gsbase case.

Add it back by changing the branches so that FENCE_SWAPGS_KERNEL_ENTRY
can cover both branches.

  [ bp: Massage, fix typos, remove obsolete comment while at it. ]

Fixes: 96b2371413e8f ("x86/entry/64: Switch CR3 before SWAPGS in paranoid entry")
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211126101209.8613-2-jiangshanlai@gmail.com
3 years agoMerge branch 'powercap'
Rafael J. Wysocki [Fri, 3 Dec 2021 17:09:32 +0000 (18:09 +0100)]
Merge branch 'powercap'

Merge DTPM fixes for 5.16-rc4.

* powercap:
  powercap: DTPM: Drop unused local variable from init_dtpm()
  powercap/drivers/dtpm: Disable DTPM at boot time

3 years agox86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword
Michael Sterritt [Fri, 19 Nov 2021 23:27:57 +0000 (15:27 -0800)]
x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword

Properly type the operands being passed to __put_user()/__get_user().
Otherwise, these routines truncate data for dependent instructions
(e.g., INSW) and only read/write one byte.

This has been tested by sending a string with REP OUTSW to a port and
then reading it back in with REP INSW on the same port.

Previous behavior was to only send and receive the first char of the
size. For example, word operations for "abcd" would only read/write
"ac". With change, the full string is now written and read back.

Fixes: f980f9c31a923 (x86/sev-es: Compile early handler code into kernel image)
Signed-off-by: Michael Sterritt <sterritt@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Peter Gonda <pgonda@google.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Link: https://lkml.kernel.org/r/20211119232757.176201-1-sterritt@google.com
3 years agopowercap: DTPM: Drop unused local variable from init_dtpm()
Rafael J. Wysocki [Fri, 3 Dec 2021 16:51:59 +0000 (17:51 +0100)]
powercap: DTPM: Drop unused local variable from init_dtpm()

The dtpm_descr variable in init_dtpm() is not used after commit
f751db8adaea ("powercap/drivers/dtpm: Disable DTPM at boot time"),
so drop it.

Fixes: f751db8adaea ("powercap/drivers/dtpm: Disable DTPM at boot time")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
3 years agoio-wq: don't retry task_work creation failure on fatal conditions
Jens Axboe [Fri, 3 Dec 2021 02:40:15 +0000 (19:40 -0700)]
io-wq: don't retry task_work creation failure on fatal conditions

We don't want to be retrying task_work creation failure if there's
an actual signal pending for the parent task. If we do, then we can
enter an infinite loop of perpetually retrying and each retry failing
with -ERESTARTNOINTR because a signal is pending.

Fixes: 3146cba99aa2 ("io-wq: make worker creation resilient against signals")
Reported-by: Florian Fischer <florian.fl.fischer@fau.de>
Link: https://lore.kernel.org/io-uring/20211202165606.mqryio4yzubl7ms5@pasture/
Tested-by: Florian Fischer <florian.fl.fischer@fau.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
3 years agoserial: 8250_bcm7271: UART errors after resuming from S2
Al Cooper [Wed, 1 Dec 2021 20:14:02 +0000 (15:14 -0500)]
serial: 8250_bcm7271: UART errors after resuming from S2

There is a small window in time during resume where the hardware
flow control signal RTS can be asserted (which allows a sender to
resume sending data to the UART) but the baud rate has not yet
been restored. This will cause corrupted data and FRAMING, OVERRUN
and BREAK errors. This is happening because the MCTRL register is
shadowed in uart_port struct and is later used during resume to set
the MCTRL register during both serial8250_do_startup() and
uart_resume_port(). Unfortunately, serial8250_do_startup()
happens before the UART baud rate is restored. The fix is to clear
the shadowed mctrl value at the end of suspend and restore it at the
end of resume.

Fixes: 41a469482de2 ("serial: 8250: Add new 8250-core based Broadcom STB driver")
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Al Cooper <alcooperx@gmail.com>
Link: https://lore.kernel.org/r/20211201201402.47446-1-alcooperx@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()
Zhou Qingyang [Tue, 30 Nov 2021 17:27:00 +0000 (01:27 +0800)]
usb: cdnsp: Fix a NULL pointer dereference in cdnsp_endpoint_init()

In cdnsp_endpoint_init(), cdnsp_ring_alloc() is assigned to pep->ring
and there is a dereference of it in cdnsp_endpoint_init(), which could
lead to a NULL pointer dereference on failure of cdnsp_ring_alloc().

Fix this bug by adding a check of pep->ring.

This bug was found by a static analyzer. The analysis employs
differential checking to identify inconsistent security operations
(e.g., checks or kfrees) between two code paths and confirms that the
inconsistent operations are not recovered in the current function or
the callers, so they constitute bugs.

Note that, as a bug found by static analysis, it can be a false
positive or hard to trigger. Multiple researchers have cross-reviewed
the bug.

Builds with CONFIG_USB_CDNSP_GADGET=y show no new warnings,
and our static analyzer no longer warns about this code.

Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
Cc: stable <stable@vger.kernel.org>
Acked-by: Pawel Laszczak <pawell@cadence.com>
Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Zhou Qingyang <zhou1615@umn.edu>
Link: https://lore.kernel.org/r/20211130172700.206650-1-zhou1615@umn.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: cdns3: gadget: fix new urb never complete if ep cancel previous requests
Frank Li [Tue, 30 Nov 2021 15:42:39 +0000 (09:42 -0600)]
usb: cdns3: gadget: fix new urb never complete if ep cancel previous requests

This issue was found at android12 MTP.
1. MTP submit many out urb request.
2. Cancel left requests (>20) when enough data get from host
3. Send ACK by IN endpoint.
4. MTP submit new out urb request.
5. 4's urb never complete.

TRACE LOG:

MtpServer-2157    [000] d..3  1287.150391: cdns3_ep_dequeue: ep1out: req: 00000000299e6836, req buff 000000009df42287, length: 0/16384 zsi, status: -115, trb: [start:87, end:87: virt addr 0x80004000ffd50420], flags:1 SID: 0
MtpServer-2157    [000] d..3  1287.150410: cdns3_gadget_giveback: ep1out: req: 00000000299e6836, req buff 000000009df42287, length: 0/16384 zsi, status: -104, trb: [start:87, end:87: virt addr 0x80004000ffd50420], flags:0 SID: 0
MtpServer-2157    [000] d..3  1287.150433: cdns3_ep_dequeue: ep1out: req: 0000000080b7bde6, req buff 000000009ed5c556, length: 0/16384 zsi, status: -115, trb: [start:88, end:88: virt addr 0x80004000ffd5042c], flags:1 SID: 0
MtpServer-2157    [000] d..3  1287.150446: cdns3_gadget_giveback: ep1out: req: 0000000080b7bde6, req buff 000000009ed5c556, length: 0/16384 zsi, status: -104, trb: [start:88, end:88: virt addr 0x80004000ffd5042c], flags:0 SID: 0
....
MtpServer-2157    [000] d..1  1293.630410: cdns3_alloc_request: ep1out: req: 00000000afbccb7d, req buff 0000000000000000, length: 0/0 zsi, status: 0, trb: [start:0, end:0: virt addr (null)], flags:0 SID: 0
MtpServer-2157    [000] d..2  1293.630421: cdns3_ep_queue: ep1out: req: 00000000afbccb7d, req buff 00000000871caf90, length: 0/512 zsi, status: -115, trb: [start:0, end:0: virt addr (null)], flags:0 SID: 0
MtpServer-2157    [000] d..2  1293.630445: cdns3_wa1: WA1: ep1out set guard
MtpServer-2157    [000] d..2  1293.630450: cdns3_wa1: WA1: ep1out restore cycle bit
MtpServer-2157    [000] d..2  1293.630453: cdns3_prepare_trb: ep1out: trb 000000007317b3ee, dma buf: 0xffd5bc00, size: 512, burst: 128 ctrl: 0x00000424 (C=0, T=0, ISP, IOC, Normal) SID:0 LAST_SID:0
MtpServer-2157    [000] d..2  1293.630460: cdns3_doorbell_epx: ep1out, ep_trbaddr ffd50414
....
irq/241-5b13000-2154    [000] d..1  1293.680849: cdns3_epx_irq: IRQ for ep1out: 01000408 ISP , ep_traddr: ffd508ac ep_last_sid: 00000000 use_streams: 0
irq/241-5b13000-2154    [000] d..1  1293.680858: cdns3_complete_trb: ep1out: trb 0000000021a11b54, dma buf: 0xffd50420, size: 16384, burst: 128 ctrl: 0x00001810 (C=0, T=0, CHAIN, LINK) SID:0 LAST_SID:0
irq/241-5b13000-2154    [000] d..1  1293.680865: cdns3_request_handled: Req: 00000000afbccb7d not handled, DMA pos: 185, ep deq: 88, ep enq: 185, start trb: 184, end trb: 184

Actually DMA pos already bigger than previous submit request afbccb7d's TRB (184-184). The reason of (not handled) is that deq position is wrong.

The TRB link is below when irq happen.

DEQ LINK LINK LINK LINK LINK .... TRB(afbccb7d):START  DMA(EP_TRADDR).

Original code check LINK TRB, but DEQ just move one step.

LINK DEQ LINK LINK LINK LINK .... TRB(afbccb7d):START  DMA(EP_TRADDR).

This patch skip all LINK TRB and sync DEQ to trb's start.

LINK LINK LINK LINK LINK .... DEQ = TRB(afbccb7d):START  DMA(EP_TRADDR).

Acked-by: Peter Chen <peter.chen@kernel.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Jun Li <jun.li@nxp.com>
Link: https://lore.kernel.org/r/20211130154239.8029-1-Frank.Li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: typec: tcpm: Wait in SNK_DEBOUNCED until disconnect
Badhri Jagan Sridharan [Tue, 30 Nov 2021 00:18:25 +0000 (16:18 -0800)]
usb: typec: tcpm: Wait in SNK_DEBOUNCED until disconnect

Stub from the spec:
"4.5.2.2.4.2 Exiting from AttachWait.SNK State
A Sink shall transition to Unattached.SNK when the state of both
the CC1 and CC2 pins is SNK.Open for at least tPDDebounce.
A DRP shall transition to Unattached.SRC when the state of both
the CC1 and CC2 pins is SNK.Open for at least tPDDebounce."

This change makes TCPM to wait in SNK_DEBOUNCED state until
CC1 and CC2 pins is SNK.Open for at least tPDDebounce. Previously,
TCPM resets the port if vbus is not present in PD_T_PS_SOURCE_ON.
This causes TCPM to loop continuously when connected to a
faulty power source that does not present vbus. Waiting in
SNK_DEBOUNCED also ensures that TCPM is adherant to
"4.5.2.2.4.2 Exiting from AttachWait.SNK State" requirements.

[ 6169.280751] CC1: 0 -> 0, CC2: 0 -> 5 [state TOGGLING, polarity 0, connected]
[ 6169.280759] state change TOGGLING -> SNK_ATTACH_WAIT [rev2 NONE_AMS]
[ 6169.280771] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev2 NONE_AMS]
[ 6169.282427] CC1: 0 -> 0, CC2: 5 -> 5 [state SNK_ATTACH_WAIT, polarity 0, connected]
[ 6169.450825] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms]
[ 6169.450834] pending state change SNK_DEBOUNCED -> PORT_RESET @ 480 ms [rev2 NONE_AMS]
[ 6169.930892] state change SNK_DEBOUNCED -> PORT_RESET [delayed 480 ms]
[ 6169.931296] disable vbus discharge ret:0
[ 6169.931301] Setting usb_comm capable false
[ 6169.932783] Setting voltage/current limit 0 mV 0 mA
[ 6169.932802] polarity 0
[ 6169.933706] Requesting mux state 0, usb-role 0, orientation 0
[ 6169.936689] cc:=0
[ 6169.936812] pending state change PORT_RESET -> PORT_RESET_WAIT_OFF @ 100 ms [rev2 NONE_AMS]
[ 6169.937157] CC1: 0 -> 0, CC2: 5 -> 0 [state PORT_RESET, polarity 0, disconnected]
[ 6170.036880] state change PORT_RESET -> PORT_RESET_WAIT_OFF [delayed 100 ms]
[ 6170.036890] state change PORT_RESET_WAIT_OFF -> SNK_UNATTACHED [rev2 NONE_AMS]
[ 6170.036896] Start toggling
[ 6170.041412] CC1: 0 -> 0, CC2: 0 -> 0 [state TOGGLING, polarity 0, disconnected]
[ 6170.042973] CC1: 0 -> 0, CC2: 0 -> 5 [state TOGGLING, polarity 0, connected]
[ 6170.042976] state change TOGGLING -> SNK_ATTACH_WAIT [rev2 NONE_AMS]
[ 6170.042981] pending state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED @ 170 ms [rev2 NONE_AMS]
[ 6170.213014] state change SNK_ATTACH_WAIT -> SNK_DEBOUNCED [delayed 170 ms]
[ 6170.213019] pending state change SNK_DEBOUNCED -> PORT_RESET @ 480 ms [rev2 NONE_AMS]
[ 6170.693068] state change SNK_DEBOUNCED -> PORT_RESET [delayed 480 ms]
[ 6170.693304] disable vbus discharge ret:0
[ 6170.693308] Setting usb_comm capable false
[ 6170.695193] Setting voltage/current limit 0 mV 0 mA
[ 6170.695210] polarity 0
[ 6170.695990] Requesting mux state 0, usb-role 0, orientation 0
[ 6170.701896] cc:=0
[ 6170.702181] pending state change PORT_RESET -> PORT_RESET_WAIT_OFF @ 100 ms [rev2 NONE_AMS]
[ 6170.703343] CC1: 0 -> 0, CC2: 5 -> 0 [state PORT_RESET, polarity 0, disconnected]

Fixes: f0690a25a140b8 ("staging: typec: USB Type-C Port Manager (tcpm)")
Cc: stable@vger.kernel.org
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20211130001825.3142830-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoUSB: NO_LPM quirk Lenovo Powered USB-C Travel Hub
Ole Ernst [Sat, 27 Nov 2021 09:05:45 +0000 (10:05 +0100)]
USB: NO_LPM quirk Lenovo Powered USB-C Travel Hub

This is another branded 8153 device that doesn't work well with LPM:
r8152 2-2.1:1.0 enp0s13f0u2u1: Stop submitting intr, status -71

Disable LPM to resolve the issue.

Signed-off-by: Ole Ernst <olebowle@gmx.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211127090546.52072-1-olebowle@gmx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoxhci: Fix commad ring abort, write all 64 bits to CRCR register.
Mathias Nyman [Fri, 26 Nov 2021 12:23:40 +0000 (14:23 +0200)]
xhci: Fix commad ring abort, write all 64 bits to CRCR register.

Turns out some xHC controllers require all 64 bits in the CRCR register
to be written to execute a command abort.

The lower 32 bits containing the command abort bit is written first.
In case the command ring stops before we write the upper 32 bits then
hardware may use these upper bits to set the commnd ring dequeue pointer.

Solve this by making sure the upper 32 bits contain a valid command
ring dequeue pointer.

The original patch that only wrote the first 32 to stop the ring went
to stable, so this fix should go there as well.

Fixes: ff0e50d3564f ("xhci: Fix command ring pointer corruption while aborting a command")
Cc: stable@vger.kernel.org
Tested-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20211126122340.1193239-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agox86/64/mm: Map all kernel memory into trampoline_pgd
Joerg Roedel [Thu, 2 Dec 2021 15:32:26 +0000 (16:32 +0100)]
x86/64/mm: Map all kernel memory into trampoline_pgd

The trampoline_pgd only maps the 0xfffffff000000000-0xffffffffffffffff
range of kernel memory (with 4-level paging). This range contains the
kernel's text+data+bss mappings and the module mapping space but not the
direct mapping and the vmalloc area.

This is enough to get the application processors out of real-mode, but
for code that switches back to real-mode the trampoline_pgd is missing
important parts of the address space. For example, consider this code
from arch/x86/kernel/reboot.c, function machine_real_restart() for a
64-bit kernel:

  #ifdef CONFIG_X86_32
   load_cr3(initial_page_table);
  #else
   write_cr3(real_mode_header->trampoline_pgd);

   /* Exiting long mode will fail if CR4.PCIDE is set. */
   if (boot_cpu_has(X86_FEATURE_PCID))
   cr4_clear_bits(X86_CR4_PCIDE);
  #endif

   /* Jump to the identity-mapped low memory code */
  #ifdef CONFIG_X86_32
   asm volatile("jmpl *%0" : :
        "rm" (real_mode_header->machine_real_restart_asm),
        "a" (type));
  #else
   asm volatile("ljmpl *%0" : :
        "m" (real_mode_header->machine_real_restart_asm),
        "D" (type));
  #endif

The code switches to the trampoline_pgd, which unmaps the direct mapping
and also the kernel stack. The call to cr4_clear_bits() will find no
stack and crash the machine. The real_mode_header pointer below points
into the direct mapping, and dereferencing it also causes a crash.

The reason this does not crash always is only that kernel mappings are
global and the CR3 switch does not flush those mappings. But if theses
mappings are not in the TLB already, the above code will crash before it
can jump to the real-mode stub.

Extend the trampoline_pgd to contain all kernel mappings to prevent
these crashes and to make code which runs on this page-table more
robust.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20211202153226.22946-5-joro@8bytes.org
3 years agoobjtool: Fix pv_ops noinstr validation
Peter Zijlstra [Thu, 2 Dec 2021 20:45:34 +0000 (21:45 +0100)]
objtool: Fix pv_ops noinstr validation

Boris reported that in one of his randconfig builds, objtool got
infinitely stuck. Turns out there's trivial list corruption in the
pv_ops tracking when a function is both in a static table and in a code
assignment.

Avoid re-adding function to the pv_ops[] lists when they're already on
it.

Fixes: db2b0c5d7b6f ("objtool: Support pv_opsindirect calls for noinstr")
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Link: https://lkml.kernel.org/r/20211202204534.GA16608@worktop.programming.kicks-ass.net
3 years agoMerge tag 'drm-fixes-2021-12-03-1' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Thu, 2 Dec 2021 22:38:54 +0000 (14:38 -0800)]
Merge tag 'drm-fixes-2021-12-03-1' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Bit of an uptick in patch count this week, though it's all relatively
  small overall.

  I suspect msm has been queuing up a few fixes to skew it here.
  Otherwise amdgpu has a scattered bunch of small fixes, and then some
  vc4, i915.

  virtio-gpu changes an rc1 introduced uAPI mistake, and makes it
  operate more like other drivers. This should be fine as no userspace
  relies on the behaviour yet.

  Summary:

  dma-buf:
   - memory leak fix

  msm:
   - kasan found memory overwrite
   - mmap flags
   - fencing error bug
   - ioctl NULL ptr
   - uninit var
   - devfreqless devices fix
   - dsi lanes fix
   - dp: avoid unpowered aux xfers

  amdgpu:
   - IP discovery based enumeration fixes
   - vkms fixes
   - DSC fixes for DP MST
   - Audio fix for hotplug with tiled displays
   - Misc display fixes
   - DP tunneling fix
   - DP fix
   - Aldebaran fix

  amdkfd:
   - Locking fix
   - Static checker fix
   - Fix double free

  i915:
   - backlight regression
   - Intel HDR backlight detection fix
   - revert TGL workaround that caused hangs

  virtio-gpu:
   - switch back to drm_poll

  vc4:
   - memory leak
   - error check fix
   - HVS modesetting fixes"

* tag 'drm-fixes-2021-12-03-1' of git://anongit.freedesktop.org/drm/drm: (41 commits)
  Revert "drm/i915: Implement Wa_1508744258"
  drm/amdkfd: process_info lock not needed for svm
  drm/amdgpu: adjust the kfd reset sequence in reset sriov function
  drm/amd/display: add connector type check for CRC source set
  drm/amdkfd: fix double free mem structure
  drm/amdkfd: set "r = 0" explicitly before goto
  drm/amd/display: Add work around for tunneled MST.
  drm/amd/display: Fix for the no Audio bug with Tiled Displays
  drm/amd/display: Clear DPCD lane settings after repeater training
  drm/amd/display: Allow DSC on supported MST branch devices
  drm/amdgpu: Don't halt RLC on GFX suspend
  drm/amdgpu: fix the missed handling for SDMA2 and SDMA3
  drm/amdgpu: check atomic flag to differeniate with legacy path
  drm/amdgpu: cancel the correct hrtimer on exit
  drm/amdgpu/sriov/vcn: add new vcn ip revision check case for SIENNA_CICHLID
  drm/i915/dp: Perform 30ms delay after source OUI write
  dma-buf: system_heap: Use 'for_each_sgtable_sg' in pages free flow
  drm/i915: Add support for panels with VESA backlights with PWM enable/disable
  drm/vc4: kms: Fix previous HVS commit wait
  drm/vc4: kms: Don't duplicate pending commit
  ...

3 years agoMerge tag 'drm-intel-fixes-2021-12-02' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Thu, 2 Dec 2021 19:59:26 +0000 (05:59 +1000)]
Merge tag 'drm-intel-fixes-2021-12-02' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fixing a regression where the backlight brightness control stopped working.

- Fix the Intel HDR backlight support detection.

- Reverting a w/a to fix a gpu Hang in TGL. The w/a itself was also
for a hang, but in a much rarer scenario. The proper solution need
to be done with help from user space and it will be addressed later.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Yakf9hdnR5or+zNP@intel.com
3 years agoMerge tag 'drm-misc-fixes-2021-12-02' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Thu, 2 Dec 2021 19:57:11 +0000 (05:57 +1000)]
Merge tag 'drm-misc-fixes-2021-12-02' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Switch back to drm_poll for virtio, multiple fixes (memory leak,
improper error check, some functional fixes too) for vc4, memory leak
fix in dma-buf,

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20211202084440.u3b7lbeulj7k3ltg@houat
3 years agoMerge tag 'net-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 2 Dec 2021 19:22:06 +0000 (11:22 -0800)]
Merge tag 'net-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from wireless, and wireguard.

  Mostly scattered driver changes this week, with one big clump in
  mv88e6xxx. Nothing of note, really.

  Current release - regressions:

   - smc: keep smc_close_final()'s error code during active close

  Current release - new code bugs:

   - iwlwifi: various static checker fixes (int overflow, leaks, missing
     error codes)

   - rtw89: fix size of firmware header before transfer, avoid crash

   - mt76: fix timestamp check in tx_status; fix pktid leak;

   - mscc: ocelot: fix missing unlock on error in ocelot_hwstamp_set()

  Previous releases - regressions:

   - smc: fix list corruption in smc_lgr_cleanup_early

   - ipv4: convert fib_num_tclassid_users to atomic_t

  Previous releases - always broken:

   - tls: fix authentication failure in CCM mode

   - vrf: reset IPCB/IP6CB when processing outbound pkts, prevent
     incorrect processing

   - dsa: mv88e6xxx: fixes for various device errata

   - rds: correct socket tunable error in rds_tcp_tune()

   - ipv6: fix memory leak in fib6_rule_suppress

   - wireguard: reset peer src endpoint when netns exits

   - wireguard: improve resilience to DoS around incoming handshakes

   - tcp: fix page frag corruption on page fault which involves TCP

   - mpls: fix missing attributes in delete notifications

   - mt7915: fix NULL pointer dereference with ad-hoc mode

  Misc:

   - rt2x00: be more lenient about EPROTO errors during start

   - mlx4_en: update reported link modes for 1/10G"

* tag 'net-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (85 commits)
  net: dsa: b53: Add SPI ID table
  gro: Fix inconsistent indenting
  selftests: net: Correct case name
  net/rds: correct socket tunable error in rds_tcp_tune()
  mctp: Don't let RTM_DELROUTE delete local routes
  net/smc: Keep smc_close_final rc during active close
  ibmvnic: drop bad optimization in reuse_tx_pools()
  ibmvnic: drop bad optimization in reuse_rx_pools()
  net/smc: fix wrong list_del in smc_lgr_cleanup_early
  Fix Comment of ETH_P_802_3_MIN
  ethernet: aquantia: Try MAC address from device tree
  ipv4: convert fib_num_tclassid_users to atomic_t
  net: avoid uninit-value from tcp_conn_request
  net: annotate data-races on txq->xmit_lock_owner
  octeontx2-af: Fix a memleak bug in rvu_mbox_init()
  net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources()
  vrf: Reset IPCB/IP6CB when processing outbound pkts in vrf dev xmit
  net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings()
  net: dsa: mv88e6xxx: Link in pcs_get_state() if AN is bypassed
  net: dsa: mv88e6xxx: Fix inband AN for 2500base-x on 88E6393X family
  ...

3 years agoMerge tag 'trace-v5.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Thu, 2 Dec 2021 19:07:41 +0000 (11:07 -0800)]
Merge tag 'trace-v5.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Three tracing fixes:

   - Allow compares of strings when using signed and unsigned characters

   - Fix kmemleak false positive for histogram entries

   - Handle negative numbers for user defined kretprobe data sizes"

* tag 'trace-v5.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  kprobes: Limit max data_size of the kretprobe instances
  tracing: Fix a kmemleak false positive in tracing_map
  tracing/histograms: String compares should not care about signed values

3 years agoMerge tag 'for-linus-5.16-2' of git://github.com/cminyard/linux-ipmi
Linus Torvalds [Thu, 2 Dec 2021 18:56:16 +0000 (10:56 -0800)]
Merge tag 'for-linus-5.16-2' of git://github.com/cminyard/linux-ipmi

Pull IPMI fixes from Corey Minyard:
 "Some changes that went in 5.16 had issues. When working on the design
  a piece was redesigned and things got missed. And the message type was
  not being initialized when it was allocated, resulting in crashes.

  In addition, the IPMI driver has had a shutdown issue where it could
  still have an item in a system workqueue after it had been shutdown.
  Move to a private workqueue to avoid that problem"

* tag 'for-linus-5.16-2' of git://github.com/cminyard/linux-ipmi:
  ipmi:ipmb: Fix unknown command response
  ipmi: fix IPMI_SMI_MSG_TYPE_IPMB_DIRECT response length checking
  ipmi: fix oob access due to uninit smi_msg type
  ipmi: msghandler: Make symbol 'remove_work_wq' static
  ipmi: Move remove_work to dedicated workqueue

3 years agos390: update defconfigs
Heiko Carstens [Fri, 26 Nov 2021 14:16:31 +0000 (15:16 +0100)]
s390: update defconfigs

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
3 years agoRevert "drm/i915: Implement Wa_1508744258"
José Roberto de Souza [Fri, 19 Nov 2021 14:09:30 +0000 (06:09 -0800)]
Revert "drm/i915: Implement Wa_1508744258"

This workarounds are causing hangs, because I missed the fact that it
needs to be enabled for all cases and disabled when doing a resolve
pass.

So KMD only needs to whitelist it and UMD will be the one setting it
on per case.

This reverts commit 28ec02c9cbebf3feeaf21a59df9dfbc02bda3362.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/4145
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Fixes: 28ec02c9cbeb ("drm/i915: Implement Wa_1508744258")
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211119140931.32791-1-jose.souza@intel.com
(cherry picked from commit f3799ff16fcfacd44aee55db162830df461b631f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
3 years agosched/cputime: Fix getrusage(RUSAGE_THREAD) with nohz_full
Frederic Weisbecker [Tue, 26 Oct 2021 14:10:55 +0000 (16:10 +0200)]
sched/cputime: Fix getrusage(RUSAGE_THREAD) with nohz_full

getrusage(RUSAGE_THREAD) with nohz_full may return shorter utime/stime
than the actual time.

task_cputime_adjusted() snapshots utime and stime and then adjust their
sum to match the scheduler maintained cputime.sum_exec_runtime.
Unfortunately in nohz_full, sum_exec_runtime is only updated once per
second in the worst case, causing a discrepancy against utime and stime
that can be updated anytime by the reader using vtime.

To fix this situation, perform an update of cputime.sum_exec_runtime
when the cputime snapshot reports the task as actually running while
the tick is disabled. The related overhead is then contained within the
relevant situations.

Reported-by: Hasegawa Hitomi <hasegawa-hitomi@fujitsu.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Hasegawa Hitomi <hasegawa-hitomi@fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Acked-by: Phil Auld <pauld@redhat.com>
Link: https://lore.kernel.org/r/20211026141055.57358-3-frederic@kernel.org
3 years agotimers/nohz: Last resort update jiffies on nohz_full IRQ entry
Frederic Weisbecker [Tue, 26 Oct 2021 14:10:54 +0000 (16:10 +0200)]
timers/nohz: Last resort update jiffies on nohz_full IRQ entry

When at least one CPU runs in nohz_full mode, a dedicated timekeeper CPU
is guaranteed to stay online and to never stop its tick.

Meanwhile on some rare case, the dedicated timekeeper may be running
with interrupts disabled for a while, such as in stop_machine.

If jiffies stop being updated, a nohz_full CPU may end up endlessly
programming the next tick in the past, taking the last jiffies update
monotonic timestamp as a stale base, resulting in an tick storm.

Here is a scenario where it matters:

0) CPU 0 is the timekeeper and CPU 1 a nohz_full CPU.

1) A stop machine callback is queued to execute somewhere.

2) CPU 0 reaches MULTI_STOP_DISABLE_IRQ while CPU 1 is still in
   MULTI_STOP_PREPARE. Hence CPU 0 can't do its timekeeping duty. CPU 1
   can still take IRQs.

3) CPU 1 receives an IRQ which queues a timer callback one jiffy forward.

4) On IRQ exit, CPU 1 schedules the tick one jiffy forward, taking
   last_jiffies_update as a base. But last_jiffies_update hasn't been
   updated for 2 jiffies since the timekeeper has interrupts disabled.

5) clockevents_program_event(), which relies on ktime_get(), observes
   that the expiration is in the past and therefore programs the min
   delta event on the clock.

6) The tick fires immediately, goto 3)

7) Tick storm, the nohz_full CPU is drown and takes ages to reach
   MULTI_STOP_DISABLE_IRQ, which is the only way out of this situation.

Solve this with unconditionally updating jiffies if the value is stale
on nohz_full IRQ entry. IRQs and other disturbances are expected to be
rare enough on nohz_full for the unconditional call to ktime_get() to
actually matter.

Reported-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/20211026141055.57358-2-frederic@kernel.org
3 years agonet: dsa: b53: Add SPI ID table
Florian Fainelli [Thu, 2 Dec 2021 04:17:20 +0000 (20:17 -0800)]
net: dsa: b53: Add SPI ID table

Currently autoloading for SPI devices does not use the DT ID table, it
uses SPI modalises. Supporting OF modalises is going to be difficult if
not impractical, an attempt was made but has been reverted, so ensure
that module autoloading works for this driver by adding an id_table
listing the SPI IDs for everything.

Fixes: 96c8395e2166 ("spi: Revert modalias changes")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agogro: Fix inconsistent indenting
Jiapeng Chong [Thu, 2 Dec 2021 08:30:42 +0000 (16:30 +0800)]
gro: Fix inconsistent indenting

Eliminate the follow smatch warning:

net/ipv6/ip6_offload.c:249 ipv6_gro_receive() warn: inconsistent
indenting.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoselftests: net: Correct case name
Li Zhijian [Thu, 2 Dec 2021 02:28:41 +0000 (10:28 +0800)]
selftests: net: Correct case name

ipv6_addr_bind/ipv4_addr_bind are function names. Previously, bind test
would not be run by default due to the wrong case names

Fixes: 34d0302ab861 ("selftests: Add ipv6 address bind tests to fcnal-test")
Fixes: 75b2b2b3db4c ("selftests: Add ipv4 address bind tests to fcnal-test")
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet/rds: correct socket tunable error in rds_tcp_tune()
William Kucharski [Wed, 1 Dec 2021 14:45:22 +0000 (07:45 -0700)]
net/rds: correct socket tunable error in rds_tcp_tune()

Correct an error where setting /proc/sys/net/rds/tcp/rds_tcp_rcvbuf would
instead modify the socket's sk_sndbuf and would leave sk_rcvbuf untouched.

Fixes: c6a58ffed536 ("RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket")
Signed-off-by: William Kucharski <william.kucharski@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomctp: Don't let RTM_DELROUTE delete local routes
Matt Johnston [Wed, 1 Dec 2021 08:07:42 +0000 (16:07 +0800)]
mctp: Don't let RTM_DELROUTE delete local routes

We need to test against the existing route type, not
the rtm_type in the netlink request.

Fixes: 83f0a0b7285b ("mctp: Specify route types, require rtm_type in RTM_*ROUTE messages")
Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet/smc: Keep smc_close_final rc during active close
Tony Lu [Wed, 1 Dec 2021 06:42:16 +0000 (14:42 +0800)]
net/smc: Keep smc_close_final rc during active close

When smc_close_final() returns error, the return code overwrites by
kernel_sock_shutdown() in smc_close_active(). The return code of
smc_close_final() is more important than kernel_sock_shutdown(), and it
will pass to userspace directly.

Fix it by keeping both return codes, if smc_close_final() raises an
error, return it or kernel_sock_shutdown()'s.

Link: https://lore.kernel.org/linux-s390/1f67548e-cbf6-0dce-82b5-10288a4583bd@linux.ibm.com/
Fixes: 606a63c9783a ("net/smc: Ensure the active closing peer first closes clcsock")
Suggested-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Tony Lu <tonylu@linux.alibaba.com>
Reviewed-by: Wen Gu <guwen@linux.alibaba.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoibmvnic: drop bad optimization in reuse_tx_pools()
Sukadev Bhattiprolu [Wed, 1 Dec 2021 05:48:36 +0000 (21:48 -0800)]
ibmvnic: drop bad optimization in reuse_tx_pools()

When trying to decide whether or not reuse existing rx/tx pools
we tried to allow a range of values for the pool parameters rather
than exact matches. This was intended to reuse the resources for
instance when switching between two VIO servers with different
default parameters.

But this optimization is incomplete and breaks when we try to
change the number of queues for instance. The optimization needs
to be updated, so drop it for now and simplify the code.

Fixes: bbd809305bc7 ("ibmvnic: Reuse tx pools when possible")
Reported-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: Dany Madden <drt@linux.ibm.com>
Reviewed-by: Rick Lindsley <ricklind@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoibmvnic: drop bad optimization in reuse_rx_pools()
Sukadev Bhattiprolu [Wed, 1 Dec 2021 05:48:35 +0000 (21:48 -0800)]
ibmvnic: drop bad optimization in reuse_rx_pools()

When trying to decide whether or not reuse existing rx/tx pools
we tried to allow a range of values for the pool parameters rather
than exact matches. This was intended to reuse the resources for
instance when switching between two VIO servers with different
default parameters.

But this optimization is incomplete and breaks when we try to
change the number of queues for instance. The optimization needs
to be updated, so drop it for now and simplify the code.

Fixes: 489de956e7a2 ("ibmvnic: Reuse rx pools when possible")
Reported-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: Dany Madden <drt@linux.ibm.com>
Reviewed-by: Rick Lindsley <ricklind@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet/smc: fix wrong list_del in smc_lgr_cleanup_early
Dust Li [Wed, 1 Dec 2021 03:02:30 +0000 (11:02 +0800)]
net/smc: fix wrong list_del in smc_lgr_cleanup_early

smc_lgr_cleanup_early() meant to delete the link
group from the link group list, but it deleted
the list head by mistake.

This may cause memory corruption since we didn't
remove the real link group from the list and later
memseted the link group structure.
We got a list corruption panic when testing:

[  231.277259] list_del corruption. prev->next should be ffff8881398a8000, but was 0000000000000000
[  231.278222] ------------[ cut here ]------------
[  231.278726] kernel BUG at lib/list_debug.c:53!
[  231.279326] invalid opcode: 0000 [#1] SMP NOPTI
[  231.279803] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.10.46+ #435
[  231.280466] Hardware name: Alibaba Cloud ECS, BIOS 8c24b4c 04/01/2014
[  231.281248] Workqueue: events smc_link_down_work
[  231.281732] RIP: 0010:__list_del_entry_valid+0x70/0x90
[  231.282258] Code: 4c 60 82 e8 7d cc 6a 00 0f 0b 48 89 fe 48 c7 c7 88 4c
60 82 e8 6c cc 6a 00 0f 0b 48 89 fe 48 c7 c7 c0 4c 60 82 e8 5b cc 6a 00 <0f>
0b 48 89 fe 48 c7 c7 00 4d 60 82 e8 4a cc 6a 00 0f 0b cc cc cc
[  231.284146] RSP: 0018:ffffc90000033d58 EFLAGS: 00010292
[  231.284685] RAX: 0000000000000054 RBX: ffff8881398a8000 RCX: 0000000000000000
[  231.285415] RDX: 0000000000000001 RSI: ffff88813bc18040 RDI: ffff88813bc18040
[  231.286141] RBP: ffffffff8305ad40 R08: 0000000000000003 R09: 0000000000000001
[  231.286873] R10: ffffffff82803da0 R11: ffffc90000033b90 R12: 0000000000000001
[  231.287606] R13: 0000000000000000 R14: ffff8881398a8000 R15: 0000000000000003
[  231.288337] FS:  0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[  231.289160] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  231.289754] CR2: 0000000000e72058 CR3: 000000010fa96006 CR4: 00000000003706f0
[  231.290485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  231.291211] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  231.291940] Call Trace:
[  231.292211]  smc_lgr_terminate_sched+0x53/0xa0
[  231.292677]  smc_switch_conns+0x75/0x6b0
[  231.293085]  ? update_load_avg+0x1a6/0x590
[  231.293517]  ? ttwu_do_wakeup+0x17/0x150
[  231.293907]  ? update_load_avg+0x1a6/0x590
[  231.294317]  ? newidle_balance+0xca/0x3d0
[  231.294716]  smcr_link_down+0x50/0x1a0
[  231.295090]  ? __wake_up_common_lock+0x77/0x90
[  231.295534]  smc_link_down_work+0x46/0x60
[  231.295933]  process_one_work+0x18b/0x350

Fixes: a0a62ee15a829 ("net/smc: separate locks for SMCD and SMCR link group lists")
Signed-off-by: Dust Li <dust.li@linux.alibaba.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoFix Comment of ETH_P_802_3_MIN
Xiayu Zhang [Wed, 1 Dec 2021 02:57:13 +0000 (10:57 +0800)]
Fix Comment of ETH_P_802_3_MIN

The description of ETH_P_802_3_MIN is misleading.
The value of EthernetType in Ethernet II frame is more than 0x0600,
the value of Length in 802.3 frame is less than 0x0600.

Signed-off-by: Xiayu Zhang <Xiayu.Zhang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoethernet: aquantia: Try MAC address from device tree
Tianhao Chai [Wed, 1 Dec 2021 02:57:06 +0000 (20:57 -0600)]
ethernet: aquantia: Try MAC address from device tree

Apple M1 Mac minis (2020) with 10GE NICs do not have MAC address in the
card, but instead need to obtain MAC addresses from the device tree. In
this case the hardware will report an invalid MAC.

Currently atlantic driver does not query the DT for MAC address and will
randomly assign a MAC if the NIC doesn't have a permanent MAC burnt in.
This patch causes the driver to perfer a valid MAC address from OF (if
present) over HW self-reported MAC and only fall back to a random MAC
address when neither of them is valid.

Signed-off-by: Tianhao Chai <cth451@gmail.com>
Reviewed-by: Igor Russkikh <irusskikh@marvell.com>
Reviewed-by: Hector Martin <marcan@marcan.st>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoipv4: convert fib_num_tclassid_users to atomic_t
Eric Dumazet [Thu, 2 Dec 2021 02:26:35 +0000 (18:26 -0800)]
ipv4: convert fib_num_tclassid_users to atomic_t

Before commit faa041a40b9f ("ipv4: Create cleanup helper for fib_nh")
changes to net->ipv4.fib_num_tclassid_users were protected by RTNL.

After the change, this is no longer the case, as free_fib_info_rcu()
runs after rcu grace period, without rtnl being held.

Fixes: faa041a40b9f ("ipv4: Create cleanup helper for fib_nh")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ahern <dsahern@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agogfs2: gfs2_create_inode rework
Andreas Gruenbacher [Tue, 30 Nov 2021 17:26:15 +0000 (18:26 +0100)]
gfs2: gfs2_create_inode rework

When gfs2_lookup_by_inum() calls gfs2_inode_lookup() for an uncached
inode, gfs2_inode_lookup() will place a new tentative inode into the
inode cache before verifying that there is a valid inode at the given
address.  This can race with gfs2_create_inode() which doesn't check for
duplicates inodes.  gfs2_create_inode() will try to assign the new inode
to the corresponding inode glock, and glock_set_object() will complain
that the glock is still in use by gfs2_inode_lookup's tentative inode.

We noticed this bug after adding commit 486408d690e1 ("gfs2: Cancel
remote delete work asynchronously") which allowed delete_work_func() to
race with gfs2_create_inode(), but the same race exists for
open-by-handle.

Fix that by switching from insert_inode_hash() to
insert_inode_locked4(), which does check for duplicate inodes.  We know
we've just managed to to allocate the new inode, so an inode tentatively
created by gfs2_inode_lookup() will eventually go away and
insert_inode_locked4() will always succeed.

In addition, don't flush the inode glock work anymore (this can now only
make things worse) and clean up glock_{set,clear}_object for the inode
glock somewhat.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
3 years agogfs2: gfs2_inode_lookup rework
Andreas Gruenbacher [Mon, 29 Nov 2021 09:50:41 +0000 (10:50 +0100)]
gfs2: gfs2_inode_lookup rework

Rework gfs2_inode_lookup() to only set up the new inode's glocks after
verifying that the new inode is valid.

There is no need for flushing the inode glock work queue anymore now,
so remove that as well.

While at it, get rid of the useless wrapper around iget5_locked() and
its unnecessary is_bad_inode() check.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
3 years agogfs2: gfs2_inode_lookup cleanup
Andreas Gruenbacher [Mon, 29 Nov 2021 02:35:00 +0000 (03:35 +0100)]
gfs2: gfs2_inode_lookup cleanup

In gfs2_inode_lookup, once the inode has been looked up, we check if the
inode generation (no_formal_ino) is the one we're looking for.  If it
isn't and the inode wasn't in the inode cache, we discard the newly
looked up inode.  This is unnecessary, complicates the code, and makes
future changes to gfs2_inode_lookup harder, so change the code to retain
newly looked up inodes instead.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
3 years agogfs2: Fix remote demote of weak glock holders
Andreas Gruenbacher [Mon, 22 Nov 2021 16:32:35 +0000 (17:32 +0100)]
gfs2: Fix remote demote of weak glock holders

When we mock up a temporary holder in gfs2_glock_cb to demote weak holders in
response to a remote locking conflict, we don't set the HIF_HOLDER flag.  This
causes function may_grant to BUG.  Fix by setting the missing HIF_HOLDER flag
in the mock glock holder.

In addition, define the mock glock holder where it is used.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
3 years agoarm64: ftrace: add missing BTIs
Mark Rutland [Mon, 29 Nov 2021 13:57:09 +0000 (13:57 +0000)]
arm64: ftrace: add missing BTIs

When branch target identifiers are in use, code reachable via an
indirect branch requires a BTI landing pad at the branch target site.

When building FTRACE_WITH_REGS atop patchable-function-entry, we miss
BTIs at the start start of the `ftrace_caller` and `ftrace_regs_caller`
trampolines, and when these are called from a module via a PLT (which
will use a `BR X16`), we will encounter a BTI failure, e.g.

| # insmod lkdtm.ko
| lkdtm: No crash points registered, enable through debugfs
| # echo function_graph > /sys/kernel/debug/tracing/current_tracer
| # cat /sys/kernel/debug/provoke-crash/DIRECT
| Unhandled 64-bit el1h sync exception on CPU0, ESR 0x34000001 -- BTI
| CPU: 0 PID: 174 Comm: cat Not tainted 5.16.0-rc2-dirty #3
| Hardware name: linux,dummy-virt (DT)
| pstate: 60400405 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=jc)
| pc : ftrace_caller+0x0/0x3c
| lr : lkdtm_debugfs_open+0xc/0x20 [lkdtm]
| sp : ffff800012e43b00
| x29: ffff800012e43b00 x28: 0000000000000000 x27: ffff800012e43c88
| x26: 0000000000000000 x25: 0000000000000000 x24: ffff0000c171f200
| x23: ffff0000c27b1e00 x22: ffff0000c2265240 x21: ffff0000c23c8c30
| x20: ffff8000090ba380 x19: 0000000000000000 x18: 0000000000000000
| x17: 0000000000000000 x16: ffff80001002bb4c x15: 0000000000000000
| x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000900ff0
| x11: ffff0000c4166310 x10: ffff800012e43b00 x9 : ffff8000104f2384
| x8 : 0000000000000001 x7 : 0000000000000000 x6 : 000000000000003f
| x5 : 0000000000000040 x4 : ffff800012e43af0 x3 : 0000000000000001
| x2 : ffff8000090b0000 x1 : ffff0000c171f200 x0 : ffff0000c23c8c30
| Kernel panic - not syncing: Unhandled exception
| CPU: 0 PID: 174 Comm: cat Not tainted 5.16.0-rc2-dirty #3
| Hardware name: linux,dummy-virt (DT)
| Call trace:
|  dump_backtrace+0x0/0x1a4
|  show_stack+0x24/0x30
|  dump_stack_lvl+0x68/0x84
|  dump_stack+0x1c/0x38
|  panic+0x168/0x360
|  arm64_exit_nmi.isra.0+0x0/0x80
|  el1h_64_sync_handler+0x68/0xd4
|  el1h_64_sync+0x78/0x7c
|  ftrace_caller+0x0/0x3c
|  do_dentry_open+0x134/0x3b0
|  vfs_open+0x38/0x44
|  path_openat+0x89c/0xe40
|  do_filp_open+0x8c/0x13c
|  do_sys_openat2+0xbc/0x174
|  __arm64_sys_openat+0x6c/0xbc
|  invoke_syscall+0x50/0x120
|  el0_svc_common.constprop.0+0xdc/0x100
|  do_el0_svc+0x84/0xa0
|  el0_svc+0x28/0x80
|  el0t_64_sync_handler+0xa8/0x130
|  el0t_64_sync+0x1a0/0x1a4
| SMP: stopping secondary CPUs
| Kernel Offset: disabled
| CPU features: 0x0,00000f42,da660c5f
| Memory Limit: none
| ---[ end Kernel panic - not syncing: Unhandled exception ]---

Fix this by adding the required `BTI C`, as we only require these to be
reachable via BL for direct calls or BR X16/X17 for PLTs. For now, these
are open-coded in the function prologue, matching the style of the
`__hwasan_tag_mismatch` trampoline.

In future we may wish to consider adding a new SYM_CODE_START_*()
variant which has an implicit BTI.

When ftrace is built atop mcount, the trampolines are marked with
SYM_FUNC_START(), and so get an implicit BTI. We may need to change
these over to SYM_CODE_START() in future for RELIABLE_STACKTRACE, in
case we need to apply special care aroud the return address being
rewritten.

Fixes: 97fed779f2a6 ("arm64: bti: Provide Kconfig for kernel mode BTI")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211129135709.2274019-1-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoarm64: kexec: use __pa_symbol(empty_zero_page)
Mark Rutland [Tue, 30 Nov 2021 12:18:49 +0000 (12:18 +0000)]
arm64: kexec: use __pa_symbol(empty_zero_page)

In machine_kexec_post_load() we use __pa() on `empty_zero_page`, so that
we can use the physical address during arm64_relocate_new_kernel() to
switch TTBR1 to a new set of tables. While `empty_zero_page` is part of
the old kernel, we won't clobber it until after this switch, so using it
is benign.

However, `empty_zero_page` is part of the kernel image rather than a
linear map address, so it is not correct to use __pa(x), and we should
instead use __pa_symbol(x) or __pa(lm_alias(x)). Otherwise, when the
kernel is built with DEBUG_VIRTUAL, we'll encounter splats as below, as
I've seen when fuzzing v5.16-rc3 with Syzkaller:

| ------------[ cut here ]------------
| virt_to_phys used for non-linear address: 000000008492561a (empty_zero_page+0x0/0x1000)
| WARNING: CPU: 3 PID: 11492 at arch/arm64/mm/physaddr.c:15 __virt_to_phys+0x120/0x1c0 arch/arm64/mm/physaddr.c:12
| CPU: 3 PID: 11492 Comm: syz-executor.0 Not tainted 5.16.0-rc3-00001-g48bd452a045c #1
| Hardware name: linux,dummy-virt (DT)
| pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
| pc : __virt_to_phys+0x120/0x1c0 arch/arm64/mm/physaddr.c:12
| lr : __virt_to_phys+0x120/0x1c0 arch/arm64/mm/physaddr.c:12
| sp : ffff80001af17bb0
| x29: ffff80001af17bb0 x28: ffff1cc65207b400 x27: ffffb7828730b120
| x26: 0000000000000e11 x25: 0000000000000000 x24: 0000000000000001
| x23: ffffb7828963e000 x22: ffffb78289644000 x21: 0000600000000000
| x20: 000000000000002d x19: 0000b78289644000 x18: 0000000000000000
| x17: 74706d6528206131 x16: 3635323934383030 x15: 303030303030203a
| x14: 1ffff000035e2eb8 x13: ffff6398d53f4f0f x12: 1fffe398d53f4f0e
| x11: 1fffe398d53f4f0e x10: ffff6398d53f4f0e x9 : ffffb7827c6f76dc
| x8 : ffff1cc6a9fa7877 x7 : 0000000000000001 x6 : ffff6398d53f4f0f
| x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff1cc66f2a99c0
| x2 : 0000000000040000 x1 : d7ce7775b09b5d00 x0 : 0000000000000000
| Call trace:
|  __virt_to_phys+0x120/0x1c0 arch/arm64/mm/physaddr.c:12
|  machine_kexec_post_load+0x284/0x670 arch/arm64/kernel/machine_kexec.c:150
|  do_kexec_load+0x570/0x670 kernel/kexec.c:155
|  __do_sys_kexec_load kernel/kexec.c:250 [inline]
|  __se_sys_kexec_load kernel/kexec.c:231 [inline]
|  __arm64_sys_kexec_load+0x1d8/0x268 kernel/kexec.c:231
|  __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
|  invoke_syscall+0x90/0x2e0 arch/arm64/kernel/syscall.c:52
|  el0_svc_common.constprop.2+0x1e4/0x2f8 arch/arm64/kernel/syscall.c:142
|  do_el0_svc+0xf8/0x150 arch/arm64/kernel/syscall.c:181
|  el0_svc+0x60/0x248 arch/arm64/kernel/entry-common.c:603
|  el0t_64_sync_handler+0x90/0xb8 arch/arm64/kernel/entry-common.c:621
|  el0t_64_sync+0x180/0x184 arch/arm64/kernel/entry.S:572
| irq event stamp: 2428
| hardirqs last  enabled at (2427): [<ffffb7827c6f2308>] __up_console_sem+0xf0/0x118 kernel/printk/printk.c:255
| hardirqs last disabled at (2428): [<ffffb7828223df98>] el1_dbg+0x28/0x80 arch/arm64/kernel/entry-common.c:375
| softirqs last  enabled at (2424): [<ffffb7827c411c00>] softirq_handle_end kernel/softirq.c:401 [inline]
| softirqs last  enabled at (2424): [<ffffb7827c411c00>] __do_softirq+0xa28/0x11e4 kernel/softirq.c:587
| softirqs last disabled at (2417): [<ffffb7827c59015c>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
| softirqs last disabled at (2417): [<ffffb7827c59015c>] invoke_softirq kernel/softirq.c:439 [inline]
| softirqs last disabled at (2417): [<ffffb7827c59015c>] __irq_exit_rcu kernel/softirq.c:636 [inline]
| softirqs last disabled at (2417): [<ffffb7827c59015c>] irq_exit_rcu+0x53c/0x688 kernel/softirq.c:648
| ---[ end trace 0ca578534e7ca938 ]---

With or without DEBUG_VIRTUAL __pa() will fall back to __kimg_to_phys()
for non-linear addresses, and will happen to do the right thing in this
case, even with the warning. But we should not depend upon this, and to
keep the warning useful we should fix this case.

Fix this issue by using __pa_symbol(), which handles kernel image
addresses (and checks its input is a kernel image address). This matches
what we do elsewhere, e.g. in arch/arm64/include/asm/pgtable.h:

| #define ZERO_PAGE(vaddr)       phys_to_page(__pa_symbol(empty_zero_page))

Fixes: 3744b5280e67 ("arm64: kexec: install a copy of the linear-map")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Link: https://lore.kernel.org/r/20211130121849.3319010-1-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoarm64: update PAC description for kernel
Kuan-Ying Lee [Wed, 1 Dec 2021 03:40:10 +0000 (11:40 +0800)]
arm64: update PAC description for kernel

Remove the paragraph which has nothing to do with the kernel and
add PAC description related to kernel.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Link: https://lore.kernel.org/r/20211201034014.20048-1-Kuan-Ying.Lee@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>