Linus Torvalds [Sat, 14 Oct 2017 10:49:15 +0000 (06:49 -0400)]
Merge branch '4.14-fixes' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
"More MIPS fixes for 4.14:
- Loongson 1: Set the default number of RX and TX queues to
accomodate for recent changes of stmmac driver.
- BPF: Fix uninitialised target compiler error.
- Fix cmpxchg on 32 bit signed ints for 64 bit kernels with
!kernel_uses_llsc
- Fix generic-board-config.sh for builds using O=
- Remove pr_err() calls from fpu_emu() for a case which is not a
kernel error"
* '4.14-fixes' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: math-emu: Remove pr_err() calls from fpu_emu()
MIPS: Fix generic-board-config.sh for builds using O=
MIPS: Fix cmpxchg on 32b signed ints for 64b kernel with !kernel_uses_llsc
MIPS: loongson1: set default number of rx and tx queues for stmmac
MIPS: bpf: Fix uninitialised target compiler error
Linus Torvalds [Sat, 14 Oct 2017 01:10:35 +0000 (18:10 -0700)]
Merge tag 'drm-fixes-for-v4.14-rc5' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Couple of the arm people seem to wake up so this has imx and msm
fixes, along with a bunch of i915 stable bounds fixes and an amdgpu
regression fix.
All seems pretty okay for now"
* tag 'drm-fixes-for-v4.14-rc5' of git://people.freedesktop.org/~airlied/linux:
drm/msm: fix _NO_IMPLICIT fencing case
drm/msm: fix error path cleanup
drm/msm/mdp5: Remove extra pm_runtime_put call in mdp5_crtc_cursor_set()
drm/msm/dsi: Use correct pm_runtime_put variant during host_init
drm/msm: fix return value check in _msm_gem_kernel_new()
drm/msm: use proper memory barriers for updating tail/head
drm/msm/mdp5: add missing max size for 8x74 v1
drm/amdgpu: fix placement flags in amdgpu_ttm_bind
drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
gpu: ipu-v3: pre: implement workaround for ERR009624
gpu: ipu-v3: prg: wait for double buffers to be filled on channel startup
gpu: ipu-v3: Allow channel burst locking on i.MX6 only
drm/i915: Read timings from the correct transcoder in intel_crtc_mode_get()
drm/i915: Order two completing nop_submit_request
drm/i915: Silence compiler warning for hsw_power_well_enable()
drm/i915: Use crtc_state_is_legacy_gamma in intel_color_check
drm/i915/edp: Increase the T12 delay quirk to 1300ms
drm/i915/edp: Get the Panel Power Off timestamp after panel is off
sync_file: Return consistent status in SYNC_IOC_FILE_INFO
drm/atomic: Unref duplicated drm_atomic_state in drm_atomic_helper_resume()
Dave Airlie [Fri, 13 Oct 2017 23:59:20 +0000 (09:59 +1000)]
Merge tag 'drm-intel-fixes-2017-10-11' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
drm/i915 fixes for 4.14-rc5:
Three fixes for stable:
- Use crtc_state_is_legacy_gamma in intel_color_check (Maarten)
- Read timings from the correct transcoder (Ville).
- Fix HDMI on BSW (Jani).
Other fixes:
- eDP fixes (Manasi)
- Silence compiler warnings (Chris)
- Order two completing nop_submit_request (Chris)
* tag 'drm-intel-fixes-2017-10-11' of git://anongit.freedesktop.org/drm/drm-intel:
drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
drm/i915: Read timings from the correct transcoder in intel_crtc_mode_get()
drm/i915: Order two completing nop_submit_request
drm/i915: Silence compiler warning for hsw_power_well_enable()
drm/i915: Use crtc_state_is_legacy_gamma in intel_color_check
drm/i915/edp: Increase the T12 delay quirk to 1300ms
drm/i915/edp: Get the Panel Power Off timestamp after panel is off
Dave Airlie [Fri, 13 Oct 2017 23:38:49 +0000 (09:38 +1000)]
Merge branch 'msm-fixes-4.14-rc4' of git://people.freedesktop.org/~robclark/linux into drm-fixes
bunch of msm fixes
* 'msm-fixes-4.14-rc4' of git://people.freedesktop.org/~robclark/linux:
drm/msm: fix _NO_IMPLICIT fencing case
drm/msm: fix error path cleanup
drm/msm/mdp5: Remove extra pm_runtime_put call in mdp5_crtc_cursor_set()
drm/msm/dsi: Use correct pm_runtime_put variant during host_init
drm/msm: fix return value check in _msm_gem_kernel_new()
drm/msm: use proper memory barriers for updating tail/head
drm/msm/mdp5: add missing max size for 8x74 v1
Linus Torvalds [Fri, 13 Oct 2017 23:29:08 +0000 (16:29 -0700)]
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
"18 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm, swap: use page-cluster as max window of VMA based swap readahead
mm: page_vma_mapped: ensure pmd is loaded with READ_ONCE outside of lock
kmemleak: clear stale pointers from task stacks
fs/binfmt_misc.c: node could be NULL when evicting inode
fs/mpage.c: fix mpage_writepage() for pages with buffers
linux/kernel.h: add/correct kernel-doc notation
tty: fall back to N_NULL if switching to N_TTY fails during hangup
Revert "vmalloc: back off when the current task is killed"
mm/cma.c: take __GFP_NOWARN into account in cma_alloc()
scripts/kallsyms.c: ignore symbol type 'n'
userfaultfd: selftest: exercise -EEXIST only in background transfer
mm: only display online cpus of the numa node
mm: remove unnecessary WARN_ONCE in page_vma_mapped_walk().
mm/mempolicy: fix NUMA_INTERLEAVE_HIT counter
include/linux/of.h: provide of_n_{addr,size}_cells wrappers for !CONFIG_OF
mm/madvise.c: add description for MADV_WIPEONFORK and MADV_KEEPONFORK
lib/Kconfig.debug: kernel hacking menu: runtime testing: keep tests together
mm/migrate: fix indexing bug (off by one) and avoid out of bound access
Huang Ying [Fri, 13 Oct 2017 22:58:29 +0000 (15:58 -0700)]
mm, swap: use page-cluster as max window of VMA based swap readahead
When the VMA based swap readahead was introduced, a new knob
/sys/kernel/mm/swap/vma_ra_max_order
was added as the max window of VMA swap readahead. This is to make it
possible to use different max window for VMA based readahead and
original physical readahead. But Minchan Kim pointed out that this will
cause a regression because setting page-cluster sysctl to zero cannot
disable swap readahead with the change.
To fix the regression, the page-cluster sysctl is used as the max window
of both the VMA based swap readahead and original physical swap
readahead. If more fine grained control is needed in the future, more
knobs can be added as the subordinate knobs of the page-cluster sysctl.
The vma_ra_max_order knob is deleted. Because the knob was introduced
in v4.14-rc1, and this patch is targeting being merged before v4.14
releasing, there should be no existing users of this newly added ABI.
Link: http://lkml.kernel.org/r/20171011070847.16003-1-ying.huang@intel.com Fixes: ec560175c0b6fce ("mm, swap: VMA based swap readahead") Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reported-by: Minchan Kim <minchan@kernel.org> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Will Deacon [Fri, 13 Oct 2017 22:58:25 +0000 (15:58 -0700)]
mm: page_vma_mapped: ensure pmd is loaded with READ_ONCE outside of lock
Loading the pmd without holding the pmd_lock exposes us to races with
concurrent updaters of the page tables but, worse still, it also allows
the compiler to cache the pmd value in a register and reuse it later on,
even if we've performed a READ_ONCE in between and seen a more recent
value.
In the case of page_vma_mapped_walk, this leads to the following crash
when the pmd loaded for the initial pmd_trans_huge check is all zeroes
and a subsequent valid table entry is loaded by check_pmd. We then
proceed into map_pte, but the compiler re-uses the zero entry inside
pte_offset_map, resulting in a junk pointer being installed in
pvmw->pte:
PC is at check_pte+0x20/0x170
LR is at page_vma_mapped_walk+0x2e0/0x540
[...]
Process doio (pid: 2463, stack limit = 0xffff00000f2e8000)
Call trace:
check_pte+0x20/0x170
page_vma_mapped_walk+0x2e0/0x540
page_mkclean_one+0xac/0x278
rmap_walk_file+0xf0/0x238
rmap_walk+0x64/0xa0
page_mkclean+0x90/0xa8
clear_page_dirty_for_io+0x84/0x2a8
mpage_submit_page+0x34/0x98
mpage_process_page_bufs+0x164/0x170
mpage_prepare_extent_to_map+0x134/0x2b8
ext4_writepages+0x484/0xe30
do_writepages+0x44/0xe8
__filemap_fdatawrite_range+0xbc/0x110
file_write_and_wait_range+0x48/0xd8
ext4_sync_file+0x80/0x4b8
vfs_fsync_range+0x64/0xc0
SyS_msync+0x194/0x1e8
This patch fixes the problem by ensuring that READ_ONCE is used before
the initial checks on the pmd, and this value is subsequently used when
checking whether or not the pmd is present. pmd_check is removed and
the pmd_present check is inlined directly.
Link: http://lkml.kernel.org/r/1507222630-5839-1-git-send-email-will.deacon@arm.com Fixes: f27176cfc363 ("mm: convert page_mkclean_one() to use page_vma_mapped_walk()") Signed-off-by: Will Deacon <will.deacon@arm.com> Tested-by: Yury Norov <ynorov@caviumnetworks.com> Tested-by: Richard Ruigrok <rruigrok@codeaurora.org> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Eryu Guan [Fri, 13 Oct 2017 22:58:18 +0000 (15:58 -0700)]
fs/binfmt_misc.c: node could be NULL when evicting inode
inode->i_private is assigned by a Node pointer only after registering a
new binary format, so it could be NULL if inode was created by
bm_fill_super() (or iput() was called by the error path in
bm_register_write()), and this could result in NULL pointer dereference
when evicting such an inode. e.g. mount binfmt_misc filesystem then
umount it immediately:
mount -t binfmt_misc binfmt_misc /proc/sys/fs/binfmt_misc
umount /proc/sys/fs/binfmt_misc
Matthew Wilcox [Fri, 13 Oct 2017 22:58:15 +0000 (15:58 -0700)]
fs/mpage.c: fix mpage_writepage() for pages with buffers
When using FAT on a block device which supports rw_page, we can hit
BUG_ON(!PageLocked(page)) in try_to_free_buffers(). This is because we
call clean_buffers() after unlocking the page we've written. Introduce
a new clean_page_buffers() which cleans all buffers associated with a
page and call it from within bdev_write_page().
[akpm@linux-foundation.org: s/PAGE_SIZE/~0U/ per Linus and Matthew] Link: http://lkml.kernel.org/r/20171006211541.GA7409@bombadil.infradead.org Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Reported-by: Toshi Kani <toshi.kani@hpe.com> Reported-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Tested-by: Toshi Kani <toshi.kani@hpe.com> Acked-by: Johannes Thumshirn <jthumshirn@suse.de> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Johannes Weiner [Fri, 13 Oct 2017 22:58:08 +0000 (15:58 -0700)]
tty: fall back to N_NULL if switching to N_TTY fails during hangup
We have seen NULL-pointer dereference crashes in tty->disc_data when the
N_TTY fallback driver failed to open during hangup. The immediate cause
of this open to fail has been addressed in the preceding patch to
vmalloc(), but this code could be more robust.
As Alan pointed out in commit 8a8dabf2dd68 ("tty: handle the case where
we cannot restore a line discipline"), the N_TTY driver, historically
the safe fallback that could never fail, can indeed fail, but the
surrounding code is not prepared to handle this. To avoid crashes he
added a new N_NULL driver to take N_TTY's place as the last resort.
Hook that fallback up to the hangup path. Update tty_ldisc_reinit() to
reflect the reality that n_tty_open can indeed fail.
Link: http://lkml.kernel.org/r/20171004185959.GC2136@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Alan Cox <alan@llwyncelyn.cymru> Cc: Christoph Hellwig <hch@lst.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Johannes Weiner [Fri, 13 Oct 2017 22:58:05 +0000 (15:58 -0700)]
Revert "vmalloc: back off when the current task is killed"
This reverts commits 5d17a73a2ebe ("vmalloc: back off when the current
task is killed") and 171012f56127 ("mm: don't warn when vmalloc() fails
due to a fatal signal").
Commit 5d17a73a2ebe ("vmalloc: back off when the current task is
killed") made all vmalloc allocations from a signal-killed task fail.
We have seen crashes in the tty driver from this, where a killed task
exiting tries to switch back to N_TTY, fails n_tty_open because of the
vmalloc failing, and later crashes when dereferencing tty->disc_data.
Arguably, relying on a vmalloc() call to succeed in order to properly
exit a task is not the most robust way of doing things. There will be a
follow-up patch to the tty code to fall back to the N_NULL ldisc.
But the justification to make that vmalloc() call fail like this isn't
convincing, either. The patch mentions an OOM victim exhausting the
memory reserves and thus deadlocking the machine. But the OOM killer is
only one, improbable source of fatal signals. It doesn't make sense to
fail allocations preemptively with plenty of memory in most cases.
The patch doesn't mention real-life instances where vmalloc sites would
exhaust memory, which makes it sound more like a theoretical issue to
begin with. But just in case, the OOM access to memory reserves has
been restricted on the allocator side in cd04ae1e2dc8 ("mm, oom: do not
rely on TIF_MEMDIE for memory reserves access"), which should take care
of any theoretical concerns on that front.
Revert this patch, and the follow-up that suppresses the allocation
warnings when we fail the allocations due to a signal.
Link: http://lkml.kernel.org/r/20171004185906.GB2136@cmpxchg.org Fixes: 171012f56127 ("mm: don't warn when vmalloc() fails due to a fatal signal") Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Alan Cox <alan@llwyncelyn.cymru> Cc: Christoph Hellwig <hch@lst.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Boris Brezillon [Fri, 13 Oct 2017 22:58:01 +0000 (15:58 -0700)]
mm/cma.c: take __GFP_NOWARN into account in cma_alloc()
cma_alloc() unconditionally prints an INFO message when the CMA
allocation fails. Make this message conditional on the non-presence of
__GFP_NOWARN in gfp_mask.
This patch aims at removing INFO messages that are displayed when the
VC4 driver tries to allocate buffer objects. From the driver
perspective an allocation failure is acceptable, and the driver can
possibly do something to make following allocation succeed (like
flushing the VC4 internal cache).
Link: http://lkml.kernel.org/r/20171004125447.15195-1-boris.brezillon@free-electrons.com Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Laura Abbott <labbott@redhat.com> Cc: Jaewon Kim <jaewon31.kim@samsung.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Eric Anholt <eric@anholt.net> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Those symbols are detected in is_arm_mapping_symbol() and ignored.
However, if "--prefix-symbols=<prefix>" is configured as well, the
situation is different. For example, in efi/libstub, arm64 images are
built with
Those symbols are no longer ignored and included in the base address
calculation. This results in a base address of 000000000000000e, which
in turn causes kallsyms to abort with
kallsyms failure:
relative symbol value 0xffffff900800a000 out of range in relative mode
The problem is seen in little endian arm64 builds with CONFIG_EFI
enabled and with '-frecord-gcc-switches' set in KCFLAGS.
Explicitly ignore symbols of type 'n' since those are clearly debug
symbols.
Andrea Arcangeli [Fri, 13 Oct 2017 22:57:54 +0000 (15:57 -0700)]
userfaultfd: selftest: exercise -EEXIST only in background transfer
I was stress testing some backports and with high load, after some time,
the latest version of the selftest showed some false positive in
connection with the uffdio_copy_retry. This seems to fix it while still
exercising -EEXIST in the background transfer once in a while.
The fork child will quit after the last UFFDIO_COPY is run, so a
repeated UFFDIO_COPY may not return -EEXIST. This change restricts the
-EEXIST stress to the background transfer where the memory can't go away
from under it.
Also updated uffdio_zeropage, so the interface is consistent.
Link: http://lkml.kernel.org/r/20171004171541.1495-2-aarcange@redhat.com Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Zhen Lei [Fri, 13 Oct 2017 22:57:50 +0000 (15:57 -0700)]
mm: only display online cpus of the numa node
When I execute numactl -H (which reads /sys/devices/system/node/nodeX/cpumap
and displays cpumask_of_node for each node), I get different result
on X86 and arm64. For each numa node, the former only displayed online
CPUs, and the latter displayed all possible CPUs. Unfortunately, both
Linux documentation and numactl manual have not described it clear.
I sent a mail to ask for help, and Michal Hocko replied that he
preferred to print online cpus because it doesn't really make much sense
to bind anything on offline nodes.
Will said:
"I suspect the vast majority (if not all) code that reads this file was
developed for x86, so having the same behaviour for arm64 sounds like
something we should do ASAP before people try to special case with
things like #ifdef __aarch64__. I'd rather have this in 4.14 if
possible."
Link: http://lkml.kernel.org/r/1506678805-15392-2-git-send-email-thunder.leizhen@huawei.com Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Tianhong Ding <dingtianhong@huawei.com> Cc: Hanjun Guo <guohanjun@huawei.com> Cc: Libin <huawei.libin@huawei.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Zi Yan [Fri, 13 Oct 2017 22:57:47 +0000 (15:57 -0700)]
mm: remove unnecessary WARN_ONCE in page_vma_mapped_walk().
A non present pmd entry can appear after pmd_lock is taken in
page_vma_mapped_walk(), even if THP migration is not enabled. The
WARN_ONCE is unnecessary.
Link: http://lkml.kernel.org/r/20171003142606.12324-1-zi.yan@sent.com Fixes: 616b8371539a ("mm: thp: enable thp migration in generic path") Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu> Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Tested-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andrey Ryabinin [Fri, 13 Oct 2017 22:57:43 +0000 (15:57 -0700)]
mm/mempolicy: fix NUMA_INTERLEAVE_HIT counter
Commit 3a321d2a3dde ("mm: change the call sites of numa statistics
items") separated NUMA counters from zone counters, but the
NUMA_INTERLEAVE_HIT call site wasn't updated to use the new interface.
So alloc_page_interleave() actually increments NR_ZONE_INACTIVE_FILE
instead of NUMA_INTERLEAVE_HIT.
Fix this by using __inc_numa_state() interface to increment
NUMA_INTERLEAVE_HIT.
Link: http://lkml.kernel.org/r/20171003191003.8573-1-aryabinin@virtuozzo.com Fixes: 3a321d2a3dde ("mm: change the call sites of numa statistics items") Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Cc: Kemi Wang <kemi.wang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Arnd Bergmann [Fri, 13 Oct 2017 22:57:40 +0000 (15:57 -0700)]
include/linux/of.h: provide of_n_{addr,size}_cells wrappers for !CONFIG_OF
The pci-rcar driver is enabled for compile tests, and this has shown that
the driver cannot build without CONFIG_OF, following the inclusion of
commit f8f2fe7355fb ("PCI: rcar: Use new OF interrupt mapping when possible"):
drivers/pci/host/pcie-rcar.c: In function 'pci_dma_range_parser_init':
drivers/pci/host/pcie-rcar.c:1039:2: error: implicit declaration of function 'of_n_addr_cells' [-Werror=implicit-function-declaration]
parser->pna = of_n_addr_cells(node);
^
As pointed out by Ben Dooks and Geert Uytterhoeven, this is actually
supposed to build fine, which we can achieve if we make the declaration
of of_irq_parse_and_map_pci conditional on CONFIG_OF and provide an
empty inline function otherwise, as we do for a lot of other of
interfaces.
This lets us build the rcar_pci driver again without CONFIG_OF for build
testing. All platforms using this driver select OF, so this doesn't
change anything for the users.
[akpm@linux-foundation.org: be consistent with surrounding code] Link: http://lkml.kernel.org/r/20170911200805.3363318-1-arnd@arndb.de Fixes: c25da4778803 ("PCI: rcar: Add Renesas R-Car PCIe driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Frank Rowand <frank.rowand@sony.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Magnus Damm <damm@opensource.se> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mark Hairgrove [Fri, 13 Oct 2017 22:57:30 +0000 (15:57 -0700)]
mm/migrate: fix indexing bug (off by one) and avoid out of bound access
Index was incremented before last use and thus the second array could
dereference to an invalid address (not mentioning the fact that it did
not properly clear the entry we intended to clear).
Link: http://lkml.kernel.org/r/1506973525-16491-1-git-send-email-jglisse@redhat.com Fixes: 8315ada7f095bf ("mm/migrate: allow migrate_vma() to alloc new page on empty entry") Signed-off-by: Mark Hairgrove <mhairgrove@nvidia.com> Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Cc: Reza Arbab <arbab@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 13 Oct 2017 20:28:19 +0000 (13:28 -0700)]
Merge tag 'pci-v4.14-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
- revert Tegra MSI change that caused a regression on TrimSlice
(Thierry Reding)
- finish Aardvark conversion to host bridge IRQ mapping. We missed
Aardvark the first time around so it regressed (Thomas Petazzoni)
* tag 'pci-v4.14-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: aardvark: Move to struct pci_host_bridge IRQ mapping functions
Revert "PCI: tegra: Do not allocate MSI target memory"
Linus Torvalds [Fri, 13 Oct 2017 18:49:38 +0000 (11:49 -0700)]
Merge tag 'iommu-fixes-v4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
- keep an important data structure in the Exynos driver around after
kernel-init to fix a kernel-oops
- keep SWIOTLB enabled when SME is active in the AMD IOMMU driver
- add a missing IOTLB sync to the AMD IOMMU driver
* tag 'iommu-fixes-v4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Finish TLB flush in amd_iommu_unmap()
iommu/exynos: Remove initconst attribute to avoid potential kernel oops
iommu/amd: Do not disable SWIOTLB if SME is active
Linus Torvalds [Fri, 13 Oct 2017 18:44:09 +0000 (11:44 -0700)]
Merge tag 'devicetree-fixes-for-4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree fixes from Rob Herring:
- Fix memory leak in error case of of_console_check
- Increase number of reserved memory regions to 32. 16 was not enough
on some Power systems.
- Fix OF node refcounting for of_fwnode_graph_get_port_parent
* tag 'devicetree-fixes-for-4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
device property: preserve usecount for node passed to of_fwnode_graph_get_port_parent()
drivers: of: increase MAX_RESERVED_REGIONS to 32
of: do not leak console options
Linus Torvalds [Fri, 13 Oct 2017 18:39:28 +0000 (11:39 -0700)]
Merge tag 'powerpc-4.14-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"A fix for a bad bug (written by me) in our livepatch handler. Removal
of an over-zealous lockdep_assert_cpus_held() in our topology code. A
fix to the recently added emulation of cntlz[wd]. And three small
fixes to the recently added IMC PMU driver.
Thanks to: Anju T Sudhakar, Balbir Singh, Kamalesh Babulal, Naveen N.
Rao, Sandipan Das, Santosh Sivaraj, Thiago Jung Bauermann"
* tag 'powerpc-4.14-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/perf: Fix IMC initialization crash
powerpc/perf: Add ___GFP_NOWARN flag to alloc_pages_node()
powerpc/perf: Fix for core/nest imc call trace on cpuhotplug
powerpc: Don't call lockdep_assert_cpus_held() from arch_update_cpu_topology()
powerpc/lib/sstep: Fix count leading zeros instructions
powerpc/livepatch: Fix livepatch stack access
Linus Torvalds [Fri, 13 Oct 2017 18:35:03 +0000 (11:35 -0700)]
Merge tag 'for-linus-4.14c-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixlet from Juergen Gross:
"A minor fix correcting the cpu hotplug name for Xen guests"
* tag 'for-linus-4.14c-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/vcpu: Use a unified name about cpu hotplug state for pv and pvhvm
While registering nest imc at init, cpu-hotplug callback
nest_pmu_cpumask_init() makes an OPAL call to stop the engine. And if
the OPAL call fails, imc_common_cpuhp_mem_free() is invoked to cleanup
memory and cpuhotplug setup.
But when cleaning up the attribute group, we are dereferencing the
attribute element array without checking whether the backing element
is not NULL. This causes the kernel panic.
Add a check for the backing element prior to dereferencing the
attribute element, to handle the failing case gracefully.
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com> Reported-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com>
[mpe: Trim change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Dave Airlie [Fri, 13 Oct 2017 07:32:30 +0000 (17:32 +1000)]
Merge tag 'imx-drm-fixes-2017-10-12' of git://git.pengutronix.de/git/pza/linux into drm-fixes
drm/imx: i.MX5 regression fix and i.MX6QP PRE/PRG stability fixes
- Disable channel burst locking on IPUv3EX (i.MX51) and IPUv3M (i.MX53).
This fixes a regression introduced by commit 790cb4c7c954 ("drm/imx: lock
scanout transfers for consecutive bursts").
- Give PRG a head start. Waiting for both double buffers to fill up before
enabling the IPU improves startup reliability.
- Avoid PRE control register updates during unsafe window, workaround for
ERR009624.
* tag 'imx-drm-fixes-2017-10-12' of git://git.pengutronix.de/git/pza/linux:
gpu: ipu-v3: pre: implement workaround for ERR009624
gpu: ipu-v3: prg: wait for double buffers to be filled on channel startup
gpu: ipu-v3: Allow channel burst locking on i.MX6 only
Linus Torvalds [Fri, 13 Oct 2017 00:37:23 +0000 (17:37 -0700)]
Merge tag 'devprop-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull device properties framework fixes from Rafael Wysocki:
"These fix an issue related to device removal introduced during the 4.9
cycle and fix up new functionality added recently.
Specifics:
- Fix a device properties management issue, introduced during the 4.9
cycle, that causes device properties associated with a parent
device to go away on a removal of its child in some cases (Jarkko
Nikula).
- Fix inconsistencies in error codes returned by a new function
helper in the device properties framework depending on the
underlying low-level firmware interface, DT or ACPI, by making the
meaning of error codes returned in the ACPI case agree with the
meaning of DT error codes in analogous situations (Sakari Ailus)"
* tag 'devprop-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: properties: Fix __acpi_node_get_property_reference() return codes
ACPI: properties: Align return codes of __acpi_node_get_property_reference()
device property: Track owner device of device property
Linus Torvalds [Thu, 12 Oct 2017 21:51:13 +0000 (14:51 -0700)]
Merge tag 'xfs-4.14-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
- Fix a stale kernel memory exposure when logging inodes.
- Fix some build problems with CONFIG_XFS_RT=n
- Don't change inode mode if the acl write fails, leaving the file
totally inaccessible.
- Fix a dangling pointer problem when removing an attr fork under
memory pressure.
- Don't crash while trying to invalidate a null buffer associated with
a corrupt metadata pointer.
* tag 'xfs-4.14-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: handle error if xfs_btree_get_bufs fails
xfs: reinit btree pointer on attr tree inactivation walk
xfs: Fix bool initialization/comparison
xfs: don't change inode mode if ACL update fails
xfs: move more RT specific code under CONFIG_XFS_RT
xfs: Don't log uninitialised fields in inode structures
Rob Clark [Tue, 12 Sep 2017 18:23:05 +0000 (14:23 -0400)]
drm/msm: fix _NO_IMPLICIT fencing case
We need to call reservation_object_reserve_shared() in both cases, but
this wasn't happening in the _NO_IMPLICIT submit case.
Fixes: f0a42bb ("drm/msm: submit support for in-fences") Reported-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
Linus Torvalds [Thu, 12 Oct 2017 17:42:03 +0000 (10:42 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"Another latent bug related to PCID, an out-of-bounds access, and a
submaintainer change being finally made official"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
MAINTAINERS: Add Paul Mackerras as maintainer for KVM/powerpc
KVM: nVMX: fix guest CR4 loading when emulating L2 to L1 exit
KVM: MMU: always terminate page walks at level 1
KVM: nVMX: update last_nonleaf_level when initializing nested EPT
Niklas Söderlund [Tue, 22 Aug 2017 00:19:12 +0000 (02:19 +0200)]
device property: preserve usecount for node passed to of_fwnode_graph_get_port_parent()
Using CONFIG_OF_DYNAMIC=y uncovered an imbalance in the usecount of the
node being passed to of_fwnode_graph_get_port_parent(). Preserve the
usecount by using of_get_parent() instead of of_get_next_parent() which
don't decrement the usecount of the node passed to it.
Fixes: 3b27d00e7b6d7c88 ("device property: Move fwnode graph ops to firmware specific locations") Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Rob Herring <robh@kernel.org>
Stewart Smith [Tue, 26 Sep 2017 08:40:00 +0000 (18:40 +1000)]
drivers: of: increase MAX_RESERVED_REGIONS to 32
There are two types of memory reservations firmware can ask the kernel
to make in the device tree: static and dynamic.
See Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
If you have greater than 16 entries in /reserved-memory (as we do on
POWER9 systems) you would get this scary looking error message:
[ 0.000000] OF: reserved mem: not enough space all defined regions.
This is harmless if all your reservations are static (which with OPAL on
POWER9, they are).
It is not harmless if you have any dynamic reservations after the 16th.
In the first pass over the fdt to find reservations, the child nodes of
/reserved-memory are added to a static array in of_reserved_mem.c so that
memory can be reserved in a 2nd pass. The array has 16 entries. This is why,
on my dual socket POWER9 system, I get that error 4 times with 20 static
reservations.
We don't have a problem on ppc though, as in arch/powerpc/kernel/prom.c
we look at the new style /reserved-ranges property to do reservations,
and this logic was introduced in 0962e8004e974 (well before any powernv
system shipped).
A Google search shows up no occurances of that exact error message, so we're
probably safe in that no machine that people use has memory not being reserved
when it should be.
The simple fix is to bump the length of the array to 32 which "should be
enough for everyone(TM)". The simple fix of not recording static allocations
in the array would cause problems for devices with "memory-region" properties.
A more future-proof fix is likely possible, although more invasive and this
simple fix is perfectly suitable in the meantime while a more future-proof
fix is developed.
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com> Tested-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Signed-off-by: Rob Herring <robh@kernel.org>
Do not strdup() console options. It seems that the only reason for
it to be strdup()-ed was a compilation warning: printk, UART and
console drivers, for some reason, expect char pointer instead of
const char pointer. So we can just pass `of_stdout_options', but
need to cast it to char pointer. A better fix would be to change
printk, console drivers and UART to accept const char `options';
but that will take time - there are lots of drivers to update.
The patch also fixes a possible memory leak: add_preferred_console()
can fail, but we don't kfree() options.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Rob Herring <robh@kernel.org>
Archit Taneja [Fri, 6 Oct 2017 10:57:07 +0000 (16:27 +0530)]
drm/msm/mdp5: Remove extra pm_runtime_put call in mdp5_crtc_cursor_set()
While converting mdp5_enable/disable() calls to pm_runtime_get/put() API,
an extra call to pm_runtime_put_autosuspend() crept in
mdp5_crtc_cursor_set(). This results in calling the suspend handler
twice, and therefore clk_disables twice, which isn't a nice thing to do.
Fixes: d68fe15b1878 (drm/msm/mdp5: Use runtime PM get/put API instead ...) Reported-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
Archit Taneja [Fri, 6 Oct 2017 10:57:06 +0000 (16:27 +0530)]
drm/msm/dsi: Use correct pm_runtime_put variant during host_init
The DSI runtime PM suspend/resume callbacks check whether
msm_host->cfg_hnd is non-NULL before trying to enable the bus clocks.
This is done to accommodate early calls to these functions that may
happen before the bus clocks are even initialized.
Calling pm_runtime_put_autosuspend() in dsi_host_init() can result in
racy behaviour since msm_host->cfg_hnd is set very soon after. If the
suspend callback happens too late, we end up trying to disable clocks
that were never enabled, resulting in a bunch of WARN_ON splats.
Use pm_runtime_put_sync() so that the suspend callback is called
immediately.
Reported-by: Nicolas Dechesne <nicolas.dechesne@linaro.org> Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
Linus Torvalds [Thu, 12 Oct 2017 16:01:18 +0000 (09:01 -0700)]
Merge tag 'sound-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"It's been a busy week for defending the attacks from fuzzer people.
This contains various USB-audio driver fixes and sequencer core fixes
spotted by syzkaller and other fuzzer, as well as one quirk for a
Plantronics USB audio device"
* tag 'sound-4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: caiaq: Fix stray URB at probe error path
ALSA: seq: Fix use-after-free at creating a port
ALSA: usb-audio: Kill stray URB at exiting
ALSA: line6: Fix leftover URB at error-path during probe
ALSA: line6: Fix NULL dereference at podhd_disconnect()
ALSA: line6: Fix missing initialization before error path
ALSA: seq: Fix copy_from_user() call inside lock
ALSA: usb-audio: Add sample rate quirk for Plantronics P610
Wei Yongjun [Wed, 11 Oct 2017 11:36:56 +0000 (11:36 +0000)]
drm/msm: fix return value check in _msm_gem_kernel_new()
In case of error, the function msm_gem_get_vaddr() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().
Fixes: 8223286d62e2 ("drm/msm: Add a helper function for in-kernel
buffer allocations") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Rob Clark <robdclark@gmail.com>
Christian König [Fri, 1 Sep 2017 07:22:56 +0000 (09:22 +0200)]
drm/amdgpu: fix placement flags in amdgpu_ttm_bind
Otherwise we lose the NO_EVICT flag and can try to evict pinned BOs.
Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
core_imc_mem_init() at system boot use alloc_pages_node() to get memory
and alloc_pages_node() throws this stack dump when tried to allocate
memory from a node which has no memory behind it. Add a ___GFP_NOWARN
flag in allocation request as a fix.
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com> Reported-by: Michael Ellerman <mpe@ellerman.id.au> Reported-by: Venkat R.B <venkatb3@in.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Anju T Sudhakar [Wed, 4 Oct 2017 06:50:52 +0000 (12:20 +0530)]
powerpc/perf: Fix for core/nest imc call trace on cpuhotplug
Nest/core pmu units are enabled only when it is used. A reference count is
maintained for the events which uses the nest/core pmu units. Currently in
*_imc_counters_release function a WARN() is used for notification of any
underflow of ref count.
The case where event ref count hit a negative value is, when perf session is
started, followed by offlining of all cpus in a given core.
i.e. in cpuhotplug offline path ppc_core_imc_cpu_offline() function set the
ref->count to zero, if the current cpu which is about to offline is the last
cpu in a given core and make an OPAL call to disable the engine in that core.
And on perf session termination, perf->destroy (core_imc_counters_release) will
first decrement the ref->count for this core and based on the ref->count value
an opal call is made to disable the core-imc engine.
Now, since cpuhotplug path already clears the ref->count for core and disabled
the engine, perf->destroy() decrementing again at event termination make it
negative which in turn fires the WARN_ON. The same happens for nest units.
Add a check to see if the reference count is alreday zero, before decrementing
the count, so that the ref count will not hit a negative value.
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com> Reviewed-by: Santosh Sivaraj <santosh@fossix.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Haozhong Zhang [Tue, 10 Oct 2017 07:01:22 +0000 (15:01 +0800)]
KVM: nVMX: fix guest CR4 loading when emulating L2 to L1 exit
When KVM emulates an exit from L2 to L1, it loads L1 CR4 into the
guest CR4. Before this CR4 loading, the guest CR4 refers to L2
CR4. Because these two CR4's are in different levels of guest, we
should vmx_set_cr4() rather than kvm_set_cr4() here. The latter, which
is used to handle guest writes to its CR4, checks the guest change to
CR4 and may fail if the change is invalid.
The failure may cause trouble. Consider we start
a L1 guest with non-zero L1 PCID in use,
(i.e. L1 CR4.PCIDE == 1 && L1 CR3.PCID != 0)
and
a L2 guest with L2 PCID disabled,
(i.e. L2 CR4.PCIDE == 0)
and following events may happen:
1. If kvm_set_cr4() is used in load_vmcs12_host_state() to load L1 CR4
into guest CR4 (in VMCS01) for L2 to L1 exit, it will fail because
of PCID check. As a result, the guest CR4 recorded in L0 KVM (i.e.
vcpu->arch.cr4) is left to the value of L2 CR4.
2. Later, if L1 attempts to change its CR4, e.g., clearing VMXE bit,
kvm_set_cr4() in L0 KVM will think L1 also wants to enable PCID,
because the wrong L2 CR4 is used by L0 KVM as L1 CR4. As L1
CR3.PCID != 0, L0 KVM will inject GP to L1 guest.
Fixes: 4704d0befb072 ("KVM: nVMX: Exiting from L2 to L1") Cc: qemu-stable@nongnu.org Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
iommu/exynos: Remove initconst attribute to avoid potential kernel oops
Exynos SYSMMU registers standard platform device with sysmmu_of_match
table, what means that this table is accessed every time a new platform
device is registered in a system. This might happen also after the boot,
so the table must not be attributed as initconst to avoid potential kernel
oops caused by access to freed memory.
Fixes: 6b21a5db3642 ("iommu/exynos: Support for device tree") Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Dave Airlie [Thu, 12 Oct 2017 00:38:09 +0000 (10:38 +1000)]
Merge tag 'drm-misc-fixes-2017-10-11' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Core Changes:
- sync_file: Fix race in SYNC_IOC_FILE_INFO (John)
- atomic_helper: Give up reference taken in suspend helper (Jeffy)
Cc: John Einar Reitan <john.reitan@arm.com> Cc: Jeffy Chen <jeffy.chen@rock-chips.com>
* tag 'drm-misc-fixes-2017-10-11' of git://anongit.freedesktop.org/drm/drm-misc:
sync_file: Return consistent status in SYNC_IOC_FILE_INFO
drm/atomic: Unref duplicated drm_atomic_state in drm_atomic_helper_resume()
Fix more return codes for device property: Align return codes of
__acpi_node_get_property_reference().
In particular, what was missed previously:
-EPROTO could be returned in certain cases, now -EINVAL;
-EINVAL was returned if the property was not found, now -ENOENT;
-EINVAL was returned also if the index was higher than the number of
entries in a package, now -ENOENT.
Reported-by: Hyungwoo Yang <hyungwoo.yang@intel.com> Fixes: 3e3119d3088f (device property: Introduce fwnode_property_get_reference_args) Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Tested-by: Hyungwoo Yang <hyungwoo.yang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Sakari Ailus [Tue, 26 Sep 2017 09:08:27 +0000 (12:08 +0300)]
ACPI: properties: Align return codes of __acpi_node_get_property_reference()
acpi_fwnode_get_reference_args(), the function implementing ACPI
support for fwnode_property_get_reference_args(), returns directly
error codes from __acpi_node_get_property_reference(). The latter
uses different error codes than the OF implementation. In particular,
the OF implementation uses -ENOENT to indicate that the property is
not found, a reference entry is empty and there are no more
references.
Document and align the error codes for property for
fwnode_property_get_reference_args() so that they match with
of_parse_phandle_with_args().
Fixes: 3e3119d3088f (device property: Introduce fwnode_property_get_reference_args) Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Linus Torvalds [Wed, 11 Oct 2017 19:01:38 +0000 (12:01 -0700)]
Merge tag 'rpmsg-v4.14-fixes' of git://github.com/andersson/remoteproc
Pull rpmsg fixes from Bjorn Andersson:
"This corrects two mistakes in the Qualcomm GLINK SMEM driver"
* tag 'rpmsg-v4.14-fixes' of git://github.com/andersson/remoteproc:
rpmsg: glink: Fix memory leak in qcom_glink_alloc_intent()
rpmsg: glink: Unlock on error in qcom_glink_request_intent()
Linus Torvalds [Wed, 11 Oct 2017 18:58:23 +0000 (11:58 -0700)]
Merge tag 'rproc-v4.14-fixes' of git://github.com/andersson/remoteproc
Pull remoteproc fixes from Bjorn Andersson:
"This fixes a couple of issues in the imx_rproc driver and corrects the
Kconfig dependencies of the Qualcomm remoteproc drivers"
* tag 'rproc-v4.14-fixes' of git://github.com/andersson/remoteproc:
remoteproc: imx_rproc: fix return value check in imx_rproc_addr_init()
remoteproc: qcom: fix RPMSG_QCOM_GLINK_SMEM dependencies
remoteproc: imx_rproc: fix a couple off by one bugs
Wei Yongjun [Wed, 11 Oct 2017 10:48:44 +0000 (10:48 +0000)]
remoteproc: imx_rproc: fix return value check in imx_rproc_addr_init()
In case of error, the function devm_ioremap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should
be replaced with NULL test.
Jani Nikula [Thu, 28 Sep 2017 08:21:57 +0000 (11:21 +0300)]
drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
While technically CHV isn't DDI, we do look at the VBT based DDI port
info for HDMI DDC pin and DP AUX channel. (We call these "alternate",
but they're really just something that aren't platform defaults.)
In commit e4ab73a13291 ("drm/i915: Respect alternate_ddc_pin for all DDI
ports") Ville writes, "IIRC there may be CHV system that might actually
need this."
I'm not sure why there couldn't be even more platforms that need this,
but start conservative, and parse the info for CHV in addition to DDI.
Eric Sandeen [Tue, 10 Oct 2017 04:08:06 +0000 (21:08 -0700)]
xfs: handle error if xfs_btree_get_bufs fails
Jason reported that a corrupted filesystem failed to replay
the log with a metadata block out of bounds warning:
XFS (dm-2): _xfs_buf_find: Block out of range: block 0x80270fff8, EOFS 0x9c40000
_xfs_buf_find() and xfs_btree_get_bufs() return NULL if
that happens, and then when xfs_alloc_fix_freelist() calls
xfs_trans_binval() on that NULL bp, we oops with:
BUG: unable to handle kernel NULL pointer dereference at 00000000000000f8
We don't handle _xfs_buf_find errors very well, every
caller higher up the stack gets to guess at why it failed.
But we should at least handle it somehow, so return
EFSCORRUPTED here.
Reported-by: Jason L Tibbitts III <tibbs@math.uh.edu> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Brian Foster [Mon, 9 Oct 2017 18:38:56 +0000 (11:38 -0700)]
xfs: reinit btree pointer on attr tree inactivation walk
xfs_attr3_root_inactive() walks the attr fork tree to invalidate the
associated blocks. xfs_attr3_node_inactive() recursively descends
from internal blocks to leaf blocks, caching block address values
along the way to revisit parent blocks, locate the next entry and
descend down that branch of the tree.
The code that attempts to reread the parent block is unsafe because
it assumes that the local xfs_da_node_entry pointer remains valid
after an xfs_trans_brelse() and re-read of the parent buffer. Under
heavy memory pressure, it is possible that the buffer has been
reclaimed and reallocated by the time the parent block is reread.
This means that 'btree' can point to an invalid memory address, lead
to a random/garbage value for child_fsb and cause the subsequent
read of the attr fork to go off the rails and return a NULL buffer
for an attr fork offset that is most likely not allocated.
Note that this problem can be manufactured by setting
XFS_ATTR_BTREE_REF to 0 to prevent LRU caching of attr buffers,
creating a file with a multi-level attr fork and removing it to
trigger inactivation.
To address this problem, reinit the node/btree pointers to the
parent buffer after it has been re-read. This ensures btree points
to a valid record and allows the walk to proceed.
Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Thomas Meyer [Mon, 9 Oct 2017 18:38:54 +0000 (11:38 -0700)]
xfs: Fix bool initialization/comparison
Bool initializations should use true and false. Bool tests don't need
comparisons.
Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Dave Chinner [Mon, 9 Oct 2017 18:37:23 +0000 (11:37 -0700)]
xfs: don't change inode mode if ACL update fails
If we get ENOSPC half way through setting the ACL, the inode mode
can still be changed even though the ACL does not exist. Reorder the
operation to only change the mode of the inode if the ACL is set
correctly.
Whilst this does not fix the problem with crash consistency (that requires
attribute addition to be a deferred op) it does prevent ENOSPC and other
non-fatal errors setting an xattr to be handled sanely.
This fixes xfstests generic/449.
Signed-Off-By: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Dave Chinner [Mon, 9 Oct 2017 18:37:22 +0000 (11:37 -0700)]
xfs: move more RT specific code under CONFIG_XFS_RT
Various utility functions and interfaces that iterate internal
devices try to reference the realtime device even when RT support is
not compiled into the kernel.
Make sure this code is excluded from the CONFIG_XFS_RT=n build,
and where appropriate stub functions to return fatal errors if
they ever get called when RT support is not present.
Signed-Off-By: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Dave Chinner [Mon, 9 Oct 2017 18:37:22 +0000 (11:37 -0700)]
xfs: Don't log uninitialised fields in inode structures
Prevent kmemcheck from throwing warnings about reading uninitialised
memory when formatting inodes into the incore log buffer. There are
several issues here - we don't always log all the fields in the
inode log format item, and we never log the inode the
di_next_unlinked field.
In the case of the inode log format item, this is exacerbated
by the old xfs_inode_log_format structure padding issue. Hence make
the padded, 64 bit aligned version of the structure the one we always
use for formatting the log and get rid of the 64 bit variant. This
means we'll always log the 64-bit version and so recovery only needs
to convert from the unpadded 32 bit version from older 32 bit
kernels.
Signed-Off-By: Dave Chinner <dchinner@redhat.com> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Alexander Levin [Mon, 10 Apr 2017 18:46:51 +0000 (18:46 +0000)]
9p: set page uptodate when required in write_end()
Commit 77469c3f570 prevented setting the page as uptodate when we wrote
the right amount of data, fix that.
Fixes: 77469c3f570 ("9p: saner ->write_end() on failing copy into non-uptodate page") Reviewed-by: Jan Kara <jack@suse.com> Signed-off-by: Alexander Levin <alexander.levin@verizon.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 11 Oct 2017 16:16:38 +0000 (09:16 -0700)]
Merge tag 'gpio-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
"Here are some smallish GPIO fixes for v4.14. Like with pin control:
some build/Kconfig noise and one serious bug in a specific driver.
- Three Kconfig/build warning fixes
- A fix for lost edge IRQs in the OMAP driver"
* tag 'gpio-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: omap: Fix lost edge interrupts
gpio: omap: omap_gpio_show_rev is not __init
gpio: acpi: work around false-positive -Wstring-overflow warning
gpio: thunderx: select IRQ_DOMAIN_HIERARCHY instead of depends on
Linus Torvalds [Wed, 11 Oct 2017 16:00:22 +0000 (09:00 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"Fairly old DIO bug caught by Andreas (3.10+) and several slightly
younger blk_rq_map_user_iov() bugs, both on map and copy codepaths
(Vitaly and me)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
bio_copy_user_iov(): don't ignore ->iov_offset
more bio_map_user_iov() leak fixes
fix unbalanced page refcounting in bio_map_user_iov
direct-io: Prevent NULL pointer access in submit_page_section
Takashi Iwai [Wed, 11 Oct 2017 14:39:02 +0000 (16:39 +0200)]
ALSA: caiaq: Fix stray URB at probe error path
caiaq driver doesn't kill the URB properly at its error path during
the probe, which may lead to a use-after-free error later. This patch
addresses it.
Reported-by: Johan Hovold <johan@kernel.org> Reviewed-by: Johan Hovold <johan@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
HID: hid-elecom: extend to fix descriptor for HUGE trackball
In addition to DEFT, Elecom introduced a larger trackball called HUGE, in
both wired (M-HT1URBK) and wireless (M-HT1DRBK) versions. It has the same
buttons and behavior as the DEFT. This patch adds the two relevant USB IDs
to enable operation of the three Fn buttons on the top of the device.
Cc: Diego Elio Petteno <flameeyes@flameeyes.eu> Signed-off-by: Alex Manoussakis <amanou@gnu.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Jaejoong Kim [Thu, 28 Sep 2017 10:16:30 +0000 (19:16 +0900)]
HID: usbhid: fix out-of-bounds bug
The hid descriptor identifies the length and type of subordinate
descriptors for a device. If the received hid descriptor is smaller than
the size of the struct hid_descriptor, it is possible to cause
out-of-bounds.
In addition, if bNumDescriptors of the hid descriptor have an incorrect
value, this can also cause out-of-bounds while approaching hdesc->desc[n].
So check the size of hid descriptor and bNumDescriptors.
BUG: KASAN: slab-out-of-bounds in usbhid_parse+0x9b1/0xa20
Read of size 1 at addr ffff88006c5f8edf by task kworker/1:2/1261
Joe Lawrence [Mon, 2 Oct 2017 15:56:48 +0000 (11:56 -0400)]
livepatch: unpatch all klp_objects if klp_module_coming fails
When an incoming module is considered for livepatching by
klp_module_coming(), it iterates over multiple patches and multiple
kernel objects in this order:
which means that if one of the kernel objects fails to patch,
klp_module_coming()'s error path needs to unpatch and cleanup any kernel
objects that were already patched by a previous patch.
Reported-by: Miroslav Benes <mbenes@suse.cz> Suggested-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Lucas Stach [Mon, 18 Sep 2017 15:45:07 +0000 (17:45 +0200)]
gpu: ipu-v3: pre: implement workaround for ERR009624
The PRE has a bug where a software write to the CTRL register can block
the setting of the ENABLE bit by the hardware in auto repeat mode. When
this happens the PRE will fail to handle new jobs. To work around this
software must not write to CTRL register when the PRE store engine is
inside the unsafe window, where a hardware update to the ENABLE bit
may happen.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
[p.zabel@pengutronix.de: rebased before PRE tiled prefetch support] Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Lucas Stach [Fri, 24 Mar 2017 17:01:53 +0000 (18:01 +0100)]
gpu: ipu-v3: prg: wait for double buffers to be filled on channel startup
Wait for both double buffer to be filled when first starting a channel.
This makes channel startup a lot more reliable, probably because it allows
the internal state machine to settle before the requests from the IPU are
coming in.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
[p.zabel@pengutronix.de: rebased before switch to runtime PM] Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Philipp Zabel [Tue, 10 Oct 2017 13:13:55 +0000 (15:13 +0200)]
gpu: ipu-v3: Allow channel burst locking on i.MX6 only
The IDMAC_LOCK_EN registers on i.MX51 have a different layout, and on
i.MX53 enabling the lock feature causes bursts to get lost. Restrict
enabling the burst lock feature to i.MX6.
Reported-by: Patrick Brünn <P.Bruenn@beckhoff.com> Fixes: 790cb4c7c954 ("drm/imx: lock scanout transfers for consecutive bursts") Tested-by: Patrick Brünn <P.Bruenn@beckhoff.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Takashi Iwai [Mon, 9 Oct 2017 09:09:20 +0000 (11:09 +0200)]
ALSA: seq: Fix use-after-free at creating a port
There is a potential race window opened at creating and deleting a
port via ioctl, as spotted by fuzzing. snd_seq_create_port() creates
a port object and returns its pointer, but it doesn't take the
refcount, thus it can be deleted immediately by another thread.
Meanwhile, snd_seq_ioctl_create_port() still calls the function
snd_seq_system_client_ev_port_start() with the created port object
that is being deleted, and this triggers use-after-free like:
We may fix this in a few different ways, and in this patch, it's fixed
simply by taking the refcount properly at snd_seq_create_port() and
letting the caller unref the object after use. Also, there is another
potential use-after-free by sprintf() call in snd_seq_create_port(),
and this is moved inside the lock.
Al Viro [Sun, 24 Sep 2017 14:21:15 +0000 (10:21 -0400)]
bio_copy_user_iov(): don't ignore ->iov_offset
Since "block: support large requests in blk_rq_map_user_iov" we
started to call it with partially drained iter; that works fine
on the write side, but reads create a copy of iter for completion
time. And that needs to take the possibility of ->iov_iter != 0
into account...
Cc: stable@vger.kernel.org #v4.5+ Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sat, 23 Sep 2017 19:51:23 +0000 (15:51 -0400)]
more bio_map_user_iov() leak fixes
we need to take care of failure exit as well - pages already
in bio should be dropped by analogue of bio_unmap_pages(),
since their refcounts had been bumped only once per reference
in bio.
Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fix unbalanced page refcounting in bio_map_user_iov
bio_map_user_iov and bio_unmap_user do unbalanced pages refcounting if
IO vector has small consecutive buffers belonging to the same page.
bio_add_pc_page merges them into one, but the page reference is never
dropped.
Cc: stable@vger.kernel.org Signed-off-by: Vitaly Mayatskikh <v.mayatskih@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
direct-io: Prevent NULL pointer access in submit_page_section
In the code added to function submit_page_section by commit b1058b981,
sdio->bio can currently be NULL when calling dio_bio_submit. This then
leads to a NULL pointer access in dio_bio_submit, so check for a NULL
bio in submit_page_section before trying to submit it instead.
Fixes xfstest generic/250 on gfs2.
Cc: stable@vger.kernel.org # v3.10+ Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
PCI: aardvark: Move to struct pci_host_bridge IRQ mapping functions
struct pci_host_bridge gained hooks to map/swizzle IRQs, so that the IRQ
mapping can be done automatically by PCI core code through the
pci_assign_irq() function instead of resorting to arch-specific
implementation callbacks to carry out the same task which force PCI host
bridge drivers implementation to implement per-arch kludges to carry out a
task that is inherently architecture agnostic.
Commit 769b461fc0c0 ("arm64: PCI: Drop DT IRQ allocation from
pcibios_alloc_irq()") was assuming all PCI host controller drivers had been
converted to use ->map_irq(), but that wasn't the case: pci-aardvark had
not been converted. Due to this, it broke the support for legacy PCI
interrupts when using the pci-aardvark driver (used on Marvell Armada 3720
platforms).
In order to fix this, we make sure the ->map_irq and ->swizzle_irq fields
of pci_host_bridge are properly filled in.
Fixes: 769b461fc0c0 ("arm64: PCI: Drop DT IRQ allocation from pcibios_alloc_irq()") Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: stable@vger.kernel.org # v4.13+
It turns out that Tegra20 has a bug in the implementation of the MSI
target address register (which is worked around by the existence of the
struct tegra_pcie_soc.msi_base_shift parameter) that restricts the MSI
target memory to the lower 32 bits of physical memory on that particular
generation. The offending patch causes a regression on TrimSlice, which
is a Tegra20-based device and has a PCI network interface card.
An initial, simpler fix was to change the MSI target address for Tegra20
only, but it was pointed out that the offending commit also prevents the
use of 32-bit only MSI capable devices, even on later chips. Technically
this was never guaranteed to work with the prior code in the first place
because the allocated page could have resided beyond the 4 GiB boundary,
but it is still possible that this could've introduced a regression.
The proper fix that was settled on is to select a fixed address within
the lowest 32 bits of physical address space that is otherwise unused,
but testing of that patch has provided mixed results that are not fully
understood yet.
Given all of the above and the relative urgency to get this fixed in
v4.13, revert the offending commit until a universal fix is found.
Fixes: d7bd554f27c9 ("PCI: tegra: Do not allocate MSI target memory") Reported-by: Tomasz Maciej Nowak <tmn505@gmail.com> Reported-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: stable@vger.kernel.org # 4.13.x
Linus Torvalds [Tue, 10 Oct 2017 20:08:59 +0000 (13:08 -0700)]
Merge tag 'seccomp-v4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull seccomp fixlet from Kees Cook:
"Minor seccomp fix for v4.14-rc5. I debated sending this at all for
v4.14, but since it fixes a minor issue in the prior fix, which also
went to -stable, it seemed better to just get all of it cleaned up
right now.
- fix missed "static" to avoid Sparse warning (Colin King)"
* tag 'seccomp-v4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
seccomp: make function __get_seccomp_filter static
Linus Torvalds [Tue, 10 Oct 2017 20:01:51 +0000 (13:01 -0700)]
Merge tag 'nfsd-4.14-1' of git://linux-nfs.org/~bfields/linux
Pull nfsd fix from Bruce Fields:
"One fix for a 4.14 regression, and one minor fix to the MAINTAINERs
file. (I was weirdly flattered by the idea that lots of random people
suddenly seemed to think Jeff and I were VFS experts. Turns out it was
just a typo)"
* tag 'nfsd-4.14-1' of git://linux-nfs.org/~bfields/linux:
nfsd4: define nfsd4_secinfo_no_name_release()
MAINTAINERS: associate linux/fs.h with VFS instead of file locking
Colin Ian King [Fri, 29 Sep 2017 13:26:48 +0000 (14:26 +0100)]
seccomp: make function __get_seccomp_filter static
The function __get_seccomp_filter is local to the source and does
not need to be in global scope, so make it static.
Cleans up sparse warning:
symbol '__get_seccomp_filter' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com> Fixes: 66a733ea6b61 ("seccomp: fix the usage of get/put_seccomp_filter() in seccomp_get_filter()") Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
When RPMSG_QCOM_GLINK_SMEM=m and one driver causes the qcom_common.c file
to be compiled as built-in, we get a link error:
drivers/remoteproc/qcom_common.o: In function `glink_subdev_remove':
qcom_common.c:(.text+0x130): undefined reference to `qcom_glink_smem_unregister'
qcom_common.c:(.text+0x130): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `qcom_glink_smem_unregister'
drivers/remoteproc/qcom_common.o: In function `glink_subdev_probe':
qcom_common.c:(.text+0x160): undefined reference to `qcom_glink_smem_register'
qcom_common.c:(.text+0x160): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `qcom_glink_smem_register'
Out of the three PIL driver instances, QCOM_ADSP_PIL already has a
Kconfig dependency to prevent this from happening, but the other two
do not. This adds the same dependency there.
Linus Torvalds [Tue, 10 Oct 2017 17:57:46 +0000 (10:57 -0700)]
Merge tag 'linux-kselftest-4.14-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kselftest fixes from Shuah Khan:
- fix for x86: sysret_ss_attrs test build failure preventing the x86
tests from running
- fix mqueue: fix regression in silencing test run output
* tag 'linux-kselftest-4.14-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests: mqueue: fix regression in silencing output from RUN_TESTS
selftests: x86: sysret_ss_attrs doesn't build on a PIE build
Tom Lendacky [Fri, 6 Oct 2017 21:35:40 +0000 (16:35 -0500)]
iommu/amd: Do not disable SWIOTLB if SME is active
When SME memory encryption is active it will rely on SWIOTLB to handle
DMA for devices that cannot support the addressing requirements of
having the encryption mask set in the physical address. The IOMMU
currently disables SWIOTLB if it is not running in passthrough mode.
This is not desired as non-PCI devices attempting DMA may fail. Update
the code to check if SME is active and not disable SWIOTLB.
Fixes: 2543a786aa25 ("iommu/amd: Allow the AMD IOMMU to work with memory encryption") Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
The shash ahash digest adaptor function may crash if given a
zero-length input together with a null SG list. This is because
it tries to read the SG list before looking at the length.
This patch fixes it by checking the length first.
Cc: <stable@vger.kernel.org> Reported-by: Stephan Müller<smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Stephan Müller <smueller@chronox.de>
projects / kernel.git / log