Chuck Lever [Fri, 15 Jan 2021 14:28:44 +0000 (09:28 -0500)]
NFSD: Reduce svc_rqst::rq_pages churn during READDIR operations
During NFSv2 and NFSv3 READDIR/PLUS operations, NFSD advances
rq_next_page to the full size of the client-requested buffer, then
releases all those pages at the end of the request. The next request
to use that nfsd thread has to refill the pages.
NFSD does this even when the dirlist in the reply is small. With
NFSv3 clients that send READDIR operations with large buffer sizes,
that can be 256 put_page/alloc_page pairs per READDIR request, even
though those pages often remain unused.
We can save some work by not releasing dirlist buffer pages that
were not used to form the READDIR Reply. I've left the NFSv2 code
alone since there are never more than three pages involved in an
NFSv2 READDIR Reply.
Eventually we should nail down why these pages need to be released
at all in order to avoid allocating and releasing pages
unnecessarily.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Chuck Lever [Thu, 22 Oct 2020 23:46:58 +0000 (19:46 -0400)]
NFSD: Update NFSv3 READDIR entry encoders to use struct xdr_stream
The benefit of the xdr_stream helpers is that they transparently
handle encoding an XDR data item that crosses page boundaries.
Most of the open-coded logic to do that here can be eliminated.
A sub-buffer and sub-stream are set up as a sink buffer for the
directory entry encoder. As an entry is encoded, it is added to
the end of the content in this buffer/stream. The total length of
the directory list is tracked in the buffer's @len field.
When it comes time to encode the Reply, the sub-buffer is merged
into rq_res's page array at the correct place using
xdr_write_pages().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Chuck Lever [Thu, 22 Oct 2020 18:46:58 +0000 (14:46 -0400)]
NFSD: Update the NFSv3 LOOKUP3res encoder to use struct xdr_stream
Also, clean up: Rename the encoder function to match the name of
the result structure in RFC 1813, consistent with other encoder
function names in nfs3xdr.c. "diropres" is an NFSv2 thingie.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Chuck Lever [Wed, 21 Oct 2020 15:58:41 +0000 (11:58 -0400)]
NFSD: Update the GETATTR3res encoder to use struct xdr_stream
As an additional clean up, some renaming is done to more closely
reflect the data type and variable names used in the NFSv3 XDR
definition provided in RFC 1813. "attrstat" is an NFSv2 thingie.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Chuck Lever [Tue, 27 Oct 2020 19:53:42 +0000 (15:53 -0400)]
NFSD: Extract the svcxdr_init_encode() helper
NFSD initializes an encode xdr_stream only after the RPC layer has
already inserted the RPC Reply header. Thus it behaves differently
than xdr_init_encode does, which assumes the passed-in xdr_buf is
entirely devoid of content.
nfs4proc.c has this server-side stream initialization helper, but
it is visible only to the NFSv4 code. Move this helper to a place
that can be accessed by NFSv2 and NFSv3 server XDR functions.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Linus Torvalds [Sun, 21 Mar 2021 21:06:10 +0000 (14:06 -0700)]
Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"Miscellaneous ext4 bug fixes for v5.12"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: initialize ret to suppress smatch warning
ext4: stop inode update before return
ext4: fix rename whiteout with fast commit
ext4: fix timer use-after-free on failed mount
ext4: fix potential error in ext4_do_update_inode
ext4: do not try to set xattr into ea_inode if value is empty
ext4: do not iput inode under running transaction in ext4_rename()
ext4: find old entry again if failed to rename whiteout
ext4: fix error handling in ext4_end_enable_verity()
ext4: fix bh ref count on error paths
fs/ext4: fix integer overflow in s_log_groups_per_flex
ext4: add reclaim checks to xattr code
ext4: shrink race window in ext4_should_retry_alloc()
Linus Torvalds [Sun, 21 Mar 2021 19:25:54 +0000 (12:25 -0700)]
Merge tag 'io_uring-5.12-2021-03-21' of git://git.kernel.dk/linux-block
Pull io_uring followup fixes from Jens Axboe:
- The SIGSTOP change from Eric, so we properly ignore that for
PF_IO_WORKER threads.
- Disallow sending signals to PF_IO_WORKER threads in general, we're
not interested in having them funnel back to the io_uring owning
task.
- Stable fix from Stefan, ensuring we properly break links for short
send/sendmsg recv/recvmsg if MSG_WAITALL is set.
- Catch and loop when needing to run task_work before a PF_IO_WORKER
threads goes to sleep.
* tag 'io_uring-5.12-2021-03-21' of git://git.kernel.dk/linux-block:
io_uring: call req_set_fail_links() on short send[msg]()/recv[msg]() with MSG_WAITALL
io-wq: ensure task is running before processing task_work
signal: don't allow STOP on PF_IO_WORKER threads
signal: don't allow sending any signals to PF_IO_WORKER threads
Linus Torvalds [Sun, 21 Mar 2021 18:54:04 +0000 (11:54 -0700)]
Merge tag 'staging-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO driver fixes from Greg KH:
"Some small staging and IIO driver fixes:
- MAINTAINERS changes for the move of the staging mailing list
- comedi driver fixes to get request_irq() to work correctly
- counter driver fixes for reported issues with iio devices
- tiny iio driver fixes for reported issues.
All of these have been in linux-next with no reported problems"
* tag 'staging-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: vt665x: fix alignment constraints
staging: comedi: cb_pcidas64: fix request_irq() warn
staging: comedi: cb_pcidas: fix request_irq() warn
MAINTAINERS: move the staging subsystem to lists.linux.dev
MAINTAINERS: move some real subsystems off of the staging mailing list
iio: gyro: mpu3050: Fix error handling in mpu3050_trigger_handler
iio: hid-sensor-temperature: Fix issues of timestamp channel
iio: hid-sensor-humidity: Fix alignment issue of timestamp channel
counter: stm32-timer-cnt: fix ceiling miss-alignment with reload register
counter: stm32-timer-cnt: fix ceiling write max value
counter: stm32-timer-cnt: Report count function when SLAVE_MODE_DISABLED
iio: adc: ab8500-gpadc: Fix off by 10 to 3
iio:adc:stm32-adc: Add HAS_IOMEM dependency
iio: adis16400: Fix an error code in adis16400_initial_setup()
iio: adc: adi-axi-adc: add proper Kconfig dependencies
iio: adc: ad7949: fix wrong ADC result due to incorrect bit mask
iio: hid-sensor-prox: Fix scale not correct issue
iio:adc:qcom-spmi-vadc: add default scale to LR_MUX2_BAT_ID channel
Linus Torvalds [Sun, 21 Mar 2021 18:49:16 +0000 (11:49 -0700)]
Merge tag 'usb-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB and Thunderbolt driver fixes from Greg KH:
"Here are some small Thunderbolt and USB driver fixes for some reported
issues:
- thunderbolt fixes for minor problems
- typec fixes for power issues
- usb-storage quirk addition
- usbip bugfix
- dwc3 bugfix when stopping transfers
- cdnsp bugfix for isoc transfers
- gadget use-after-free fix
All have been in linux-next this week with no reported issues"
* tag 'usb-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: typec: tcpm: Skip sink_cap query only when VDM sm is busy
usb: dwc3: gadget: Prevent EP queuing while stopping transfers
usb: typec: tcpm: Invoke power_supply_changed for tcpm-source-psy-
usb: typec: Remove vdo[3] part of tps6598x_rx_identity_reg struct
usb-storage: Add quirk to defeat Kindle's automatic unload
usb: gadget: configfs: Fix KASAN use-after-free
usbip: Fix incorrect double assignment to udc->ud.tcp_rx
usb: cdnsp: Fixes incorrect value in ISOC TRB
thunderbolt: Increase runtime PM reference count on DP tunnel discovery
thunderbolt: Initialize HopID IDAs in tb_switch_alloc()
Linus Torvalds [Sun, 21 Mar 2021 18:34:24 +0000 (11:34 -0700)]
Merge tag 'irq-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Ingo Molnar:
"A change to robustify force-threaded IRQ handlers to always disable
interrupts, plus a DocBook fix.
The force-threaded IRQ handler change has been accelerated from the
normal schedule of such a change to keep the bad pattern/workaround of
spin_lock_irqsave() in handlers or IRQF_NOTHREAD as a kludge from
spreading"
* tag 'irq-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq: Disable interrupts for force threaded handlers
genirq/irq_sim: Fix typos in kernel doc (fnode -> fwnode)
Linus Torvalds [Sun, 21 Mar 2021 18:26:21 +0000 (11:26 -0700)]
Merge tag 'perf-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Boundary condition fixes for bugs unearthed by the perf fuzzer"
* tag 'perf-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Fix unchecked MSR access error caused by VLBR_EVENT
perf/x86/intel: Fix a crash caused by zero PEBS status
Linus Torvalds [Sun, 21 Mar 2021 18:11:22 +0000 (11:11 -0700)]
Merge tag 'efi-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
- another missing RT_PROP table related fix, to ensure that the
efivarfs pseudo filesystem fails gracefully if variable services
are unsupported
- use the correct alignment for literal EFI GUIDs
- fix a use after unmap issue in the memreserve code
* tag 'efi-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi: use 32-bit alignment for efi_guid_t literals
firmware/efi: Fix a use after bug in efi_mem_reserve_persistent
efivars: respect EFI_UNSUPPORTED return from firmware
Linus Torvalds [Sun, 21 Mar 2021 18:04:20 +0000 (11:04 -0700)]
Merge tag 'x86_urgent_for_v5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
"The freshest pile of shiny x86 fixes for 5.12:
- Add the arch-specific mapping between physical and logical CPUs to
fix devicetree-node lookups
- Restore the IRQ2 ignore logic
- Fix get_nr_restart_syscall() to return the correct restart syscall
number. Split in a 4-patches set to avoid kABI breakage when
backporting to dead kernels"
* tag 'x86_urgent_for_v5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic/of: Fix CPU devicetree-node lookups
x86/ioapic: Ignore IRQ2 again
x86: Introduce restart_block->arch_data to remove TS_COMPAT_RESTART
x86: Introduce TS_COMPAT_RESTART to fix get_nr_restart_syscall()
x86: Move TS_COMPAT back to asm/thread_info.h
kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
Linus Torvalds [Sun, 21 Mar 2021 17:57:35 +0000 (10:57 -0700)]
Merge tag 'powerpc-5.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix a possible stack corruption and subsequent DLPAR failure in the
rpadlpar_io PCI hotplug driver
- Two build fixes for uncommon configurations
Thanks to Christophe Leroy and Tyrel Datwyler.
* tag 'powerpc-5.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
PCI: rpadlpar: Fix potential drc_name corruption in store functions
powerpc: Force inlining of cpu_has_feature() to avoid build failure
powerpc/vdso32: Add missing _restgpr_31_x to fix build failure
Jens Axboe [Sun, 21 Mar 2021 13:06:56 +0000 (07:06 -0600)]
io-wq: ensure task is running before processing task_work
Mark the current task as running if we need to run task_work from the
io-wq threads as part of work handling. If that is the case, then return
as such so that the caller can appropriately loop back and reset if it
was part of a going-to-sleep flush.
Fixes: 869731a7cd2f ("io-wq: fork worker threads from original task") Signed-off-by: Jens Axboe <axboe@kernel.dk>
Just like we don't allow normal signals to IO threads, don't deliver a
STOP to a task that has PF_IO_WORKER set. The IO threads don't take
signals in general, and have no means of flushing out a stop either.
Longer term, we may want to look into allowing stop of these threads,
as it relates to eg process freezing. For now, this prevents a spin
issue if a SIGSTOP is delivered to the parent task.
Reported-by: Stefan Metzmacher <metze@samba.org> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Jens Axboe [Sat, 20 Mar 2021 01:25:13 +0000 (19:25 -0600)]
signal: don't allow sending any signals to PF_IO_WORKER threads
They don't take signals individually, and even if they share signals with
the parent task, don't allow them to be delivered through the worker
thread. Linux does allow this kind of behavior for regular threads, but
it's really a compatability thing that we need not care about for the IO
threads.
Reported-by: Stefan Metzmacher <metze@samba.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This patch adds rename whiteout support in fast commits. Note that the
whiteout object that gets created is actually char device. Which
imples, the function ext4_inode_journal_mode(struct inode *inode)
would return "JOURNAL_DATA" for this inode. This has a consequence in
fast commit code that it will make creation of the whiteout object a
fast-commit ineligible behavior and thus will fall back to full
commits. With this patch, this can be observed by running fast commits
with rename whiteout and seeing the stats generated by ext4_fc_stats
tracepoint as follows:
ext4_fc_stats: dev 254:32 fc ineligible reasons:
XATTR:0, CROSS_RENAME:0, JOURNAL_FLAG_CHANGE:0, NO_MEM:0, SWAP_BOOT:0,
RESIZE:0, RENAME_DIR:0, FALLOC_RANGE:0, INODE_JOURNAL_DATA:16;
num_commits:6, ineligible: 6, numblks: 3
So in short, this patch guarantees that in case of rename whiteout, we
fall back to full commits.
Amir mentioned that instead of creating a new whiteout object for
every rename, we can create a static whiteout object with irrelevant
nlink. That will make fast commits to not fall back to full
commit. But until this happens, this patch will ensure correctness by
falling back to full commits.
Jan Kara [Mon, 15 Mar 2021 16:59:06 +0000 (17:59 +0100)]
ext4: fix timer use-after-free on failed mount
When filesystem mount fails because of corrupted filesystem we first
cancel the s_err_report timer reminding fs errors every day and only
then we flush s_error_work. However s_error_work may report another fs
error and re-arm timer thus resulting in timer use-after-free. Fix the
problem by first flushing the work and only after that canceling the
s_err_report timer.
Reported-by: syzbot+628472a2aac693ab0fcd@syzkaller.appspotmail.com Fixes: a5f1fe57630e ("ext4: save error info to sb through journal if available") CC: stable@vger.kernel.org Signed-off-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20210315165906.2175-1-jack@suse.cz Signed-off-by: Theodore Ts'o <tytso@mit.edu>
zhangyi (F) [Fri, 5 Mar 2021 12:05:08 +0000 (20:05 +0800)]
ext4: do not try to set xattr into ea_inode if value is empty
Syzbot report a warning that ext4 may create an empty ea_inode if set
an empty extent attribute to a file on the file system which is no free
blocks left.
Now, ext4 try to store extent attribute into an external inode if
ext4_xattr_block_set() return -ENOSPC, but for the case of store an
empty extent attribute, store the extent entry into the extent
attribute block is enough. A simple reproduce below.
zhangyi (F) [Wed, 3 Mar 2021 13:17:03 +0000 (21:17 +0800)]
ext4: do not iput inode under running transaction in ext4_rename()
In ext4_rename(), when RENAME_WHITEOUT failed to add new entry into
directory, it ends up dropping new created whiteout inode under the
running transaction. After commit <9be5d91fe6b> ("ext4: Do not iput inode
under running transaction"), we follow the assumptions that evict() does
not get called from a transaction context but in ext4_rename() it breaks
this suggestion. Although it's not a real problem, better to obey it, so
this patch add inode to orphan list and stop transaction before final
iput().
zhangyi (F) [Wed, 3 Mar 2021 13:17:02 +0000 (21:17 +0800)]
ext4: find old entry again if failed to rename whiteout
If we failed to add new entry on rename whiteout, we cannot reset the
old->de entry directly, because the old->de could have moved from under
us during make indexed dir. So find the old entry again before reset is
needed, otherwise it may corrupt the filesystem as below.
/dev/sda: Entry '00000001' in ??? (12) has deleted/unused inode 15. CLEARED.
/dev/sda: Unattached inode 75
/dev/sda: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
Thomas Gleixner [Wed, 17 Mar 2021 14:38:52 +0000 (15:38 +0100)]
genirq: Disable interrupts for force threaded handlers
With interrupt force threading all device interrupt handlers are invoked
from kernel threads. Contrary to hard interrupt context the invocation only
disables bottom halfs, but not interrupts. This was an oversight back then
because any code like this will have an issue:
This has been triggered with networking (NAPI vs. hrtimers) and console
drivers where printk() happens from an interrupt which interrupted the
force threaded handler.
Now people noticed and started to change the spin_lock() in the handler to
spin_lock_irqsave() which affects performance or add IRQF_NOTHREAD to the
interrupt request which in turn breaks RT.
Fix the root cause and not the symptom and disable interrupts before
invoking the force threaded handler which preserves the regular semantics
and the usefulness of the interrupt force threading as a general debugging
tool.
For not RT this is not changing much, except that during the execution of
the threaded handler interrupts are delayed until the handler
returns. Vs. scheduling and softirq processing there is no difference.
For RT kernels there is no issue.
Fixes: 169f3f4ca377 ("genirq: Provide forced interrupt threading") Reported-by: Johan Hovold <johan@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Johan Hovold <johan@kernel.org> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://lore.kernel.org/r/20210317143859.513307808@linutronix.de
Linus Torvalds [Sat, 20 Mar 2021 18:01:54 +0000 (11:01 -0700)]
Merge tag 'riscv-for-linus-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
"A handful of fixes for 5.12:
- fix the SBI remote fence numbers for hypervisor fences, which had
been transcribed in the wrong order in Linux. These fences are only
used with the KVM patches applied.
- fix a whole host of build warnings, these should have no functional
change.
- fix init_resources() to prevent an off-by-one error from causing an
out-of-bounds array reference. This was manifesting during boot on
vexriscv.
- ensure the KASAN mappings are visible before proceeding to use
them"
* tag 'riscv-for-linus-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: Correct SPARSEMEM configuration
RISC-V: kasan: Declare kasan_shallow_populate() static
riscv: Ensure page table writes are flushed when initializing KASAN vmalloc
RISC-V: Fix out-of-bounds accesses in init_resources()
riscv: Fix compilation error with Canaan SoC
ftrace: Fix spelling mistake "disabed" -> "disabled"
riscv: fix bugon.cocci warnings
riscv: process: Fix no prototype for arch_dup_task_struct
riscv: ftrace: Use ftrace_get_regs helper
riscv: process: Fix no prototype for show_regs
riscv: syscall_table: Reduce W=1 compilation warnings noise
riscv: time: Fix no prototype for time_init
riscv: ptrace: Fix no prototype warnings
riscv: sbi: Fix comment of __sbi_set_timer_v01
riscv: irq: Fix no prototype warning
riscv: traps: Fix no prototype warnings
RISC-V: correct enum sbi_ext_rfence_fid
Linus Torvalds [Sat, 20 Mar 2021 18:00:25 +0000 (11:00 -0700)]
Merge tag '5.12-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Five cifs/smb3 fixes - three for stable, including an important ACL
fix and security signature fix"
* tag '5.12-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6:
cifs: fix allocation size on newly created files
cifs: warn and fail if trying to use rootfs without the config option
fs/cifs/: fix misspellings using codespell tool
cifs: Fix preauth hash corruption
cifs: update new ACE pointer after populate_new_aces.
Linus Torvalds [Sat, 20 Mar 2021 17:57:10 +0000 (10:57 -0700)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Eight fixes, all in drivers, all fairly minor either being fixes in
error legs, memory leaks on teardown, context errors or semantic
problems"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: mpt3sas: Do not use GFP_KERNEL in atomic context
scsi: ufs: ufs-mediatek: Correct operator & -> &&
scsi: sd_zbc: Update write pointer offset cache
scsi: lpfc: Fix some error codes in debugfs
scsi: qla2xxx: Fix broken #endif placement
scsi: st: Fix a use after free in st_open()
scsi: myrs: Fix a double free in myrs_cleanup()
scsi: ibmvfc: Free channel_setup_buf during device tear down
Linus Torvalds [Sat, 20 Mar 2021 00:32:30 +0000 (17:32 -0700)]
Merge tag 'zonefs-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs
Pull zonefs fixes from Damien Le Moal:
- fix inode write open reference count (Chao)
- Fix wrong write offset for asynchronous O_APPEND writes (me)
- Prevent use of sequential zone file as swap files (me)
* tag 'zonefs-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
zonefs: fix to update .i_wr_refcnt correctly in zonefs_open_zone()
zonefs: Fix O_APPEND async write handling
zonefs: prevent use of seq files as swap file
Linus Torvalds [Sat, 20 Mar 2021 00:07:10 +0000 (17:07 -0700)]
Merge tag 'block-5.12-2021-03-19' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Just an NVMe pull request this week:
- fix tag allocation for keep alive
- fix a unit mismatch for the Write Zeroes limits
- various TCP transport fixes (Sagi Grimberg, Elad Grupi)
- fix iosqes and iocqes validation for discovery controllers (Sagi Grimberg)"
* tag 'block-5.12-2021-03-19' of git://git.kernel.dk/linux-block:
nvmet-tcp: fix kmap leak when data digest in use
nvmet: don't check iosqes,iocqes for discovery controllers
nvme-rdma: fix possible hang when failing to set io queues
nvme-tcp: fix possible hang when failing to set io queues
nvme-tcp: fix misuse of __smp_processor_id with preemption enabled
nvme-tcp: fix a NULL deref when receiving a 0-length r2t PDU
nvme: fix Write Zeroes limitations
nvme: allocate the keep alive request using BLK_MQ_REQ_NOWAIT
nvme: merge nvme_keep_alive into nvme_keep_alive_work
nvme-fabrics: only reserve a single tag
Linus Torvalds [Sat, 20 Mar 2021 00:01:09 +0000 (17:01 -0700)]
Merge tag 'io_uring-5.12-2021-03-19' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Quieter week this time, which was both expected and desired. About
half of the below is fixes for this release, the other half are just
fixes in general. In detail:
- Fix the freezing of IO threads, by making the freezer not send them
fake signals. Make them freezable by default.
- Like we did for personalities, move the buffer IDR to xarray. Kills
some code and avoids a use-after-free on teardown.
- SQPOLL cleanups and fixes (Pavel)
- Fix linked timeout race (Pavel)
- Fix potential completion post use-after-free (Pavel)
- Cleanup and move internal structures outside of general kernel view
(Stefan)
- Use MSG_SIGNAL for send/recv from io_uring (Stefan)"
* tag 'io_uring-5.12-2021-03-19' of git://git.kernel.dk/linux-block:
io_uring: don't leak creds on SQO attach error
io_uring: use typesafe pointers in io_uring_task
io_uring: remove structures from include/linux/io_uring.h
io_uring: imply MSG_NOSIGNAL for send[msg]()/recv[msg]() calls
io_uring: fix sqpoll cancellation via task_work
io_uring: add generic callback_head helpers
io_uring: fix concurrent parking
io_uring: halt SQO submission on ctx exit
io_uring: replace sqd rw_semaphore with mutex
io_uring: fix complete_post use ctx after free
io_uring: fix ->flags races by linked timeouts
io_uring: convert io_buffer_idr to XArray
io_uring: allow IO worker threads to be frozen
kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing
Johan Hovold [Fri, 12 Mar 2021 09:20:33 +0000 (10:20 +0100)]
x86/apic/of: Fix CPU devicetree-node lookups
Architectures that describe the CPU topology in devicetree and do not have
an identity mapping between physical and logical CPU ids must override the
default implementation of arch_match_cpu_phys_id().
Failing to do so breaks CPU devicetree-node lookups using of_get_cpu_node()
and of_cpu_device_node_get() which several drivers rely on. It also causes
the CPU struct devices exported through sysfs to point to the wrong
devicetree nodes.
On x86, CPUs are described in devicetree using their APIC ids and those
do not generally coincide with the logical ids, even if CPU0 typically
uses APIC id 0.
Add the missing implementation of arch_match_cpu_phys_id() so that CPU-node
lookups work also with SMP.
Apart from fixing the broken sysfs devicetree-node links this likely does
not affect current users of mainline kernels on x86.
Linus Torvalds [Fri, 19 Mar 2021 21:10:07 +0000 (14:10 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"Fixes for kvm on x86:
- new selftests
- fixes for migration with HyperV re-enlightenment enabled
- fix RCU/SRCU usage
- fixes for local_irq_restore misuse false positive"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
documentation/kvm: additional explanations on KVM_SET_BOOT_CPU_ID
x86/kvm: Fix broken irq restoration in kvm_wait
KVM: X86: Fix missing local pCPU when executing wbinvd on all dirty pCPUs
KVM: x86: Protect userspace MSR filter with SRCU, and set atomically-ish
selftests: kvm: add set_boot_cpu_id test
selftests: kvm: add _vm_ioctl
selftests: kvm: add get_msr_index_features
selftests: kvm: Add basic Hyper-V clocksources tests
KVM: x86: hyper-v: Don't touch TSC page values when guest opted for re-enlightenment
KVM: x86: hyper-v: Track Hyper-V TSC page status
KVM: x86: hyper-v: Prevent using not-yet-updated TSC page by secondary CPUs
KVM: x86: hyper-v: Limit guest to writing zero to HV_X64_MSR_TSC_EMULATION_STATUS
KVM: x86/mmu: Store the address space ID in the TDP iterator
KVM: x86/mmu: Factor out tdp_iter_return_to_root
KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs
KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page
Linus Torvalds [Fri, 19 Mar 2021 21:07:19 +0000 (14:07 -0700)]
Merge tag 'gpio-fixes-for-v5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:
"Two fixes for the GPIO subsystem. Both address issues in the core GPIO
code:
- fix the return value in error path in gpiolib_dev_init()
- fix the 'gpio-line-names' property handling correctly this time"
* tag 'gpio-fixes-for-v5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpiolib: Assign fwnode to parent's if no primary one provided
gpiolib: Fix error return code in gpiolib_dev_init()
Linus Torvalds [Fri, 19 Mar 2021 18:39:28 +0000 (11:39 -0700)]
Merge tag 's390-5.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens:
- disable preemption when accessing local per-cpu variables in the new
counter set driver
- fix by a factor of four increased steal time due to missing
cputime_to_nsecs() conversion
- fix PCI device structure leak
* tag 's390-5.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/pci: fix leak of PCI device structure
s390/vtime: fix increased steal time accounting
s390/cpumf: disable preemption when accessing per-cpu variable
Linus Torvalds [Fri, 19 Mar 2021 17:06:30 +0000 (10:06 -0700)]
Merge tag 'trace-v5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull workqueue tracing fix from Steven Rostedt:
"Fix workqueue trace event unsafe string reference
After adding a verifier to test all strings printed in trace events to
make sure they either point to a string on the ring buffer, or to read
only core kernel memory, it triggered on a workqueue trace event. The
trace event workqueue_queue_work references the allocated name of the
workqueue in the output. If the workqueue is freed before the trace is
read, then the trace will dereference freed memory.
Update the trace event to use the __string(), __assign_str(), and
__get_str() helpers to handle such cases"
* tag 'trace-v5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
workqueue/tracing: Copy workqueue name to buffer in trace event
Linus Torvalds [Fri, 19 Mar 2021 17:00:10 +0000 (10:00 -0700)]
Merge tag 'pm-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"Revert two problematic commits.
Specifics:
- Revert ACPI PM commit that attempted to improve reboot handling on
some systems, but it caused other systems to panic() during reboot
(Josef Bacik)
- Revert PM-runtime commit that attempted to improve the handling of
suppliers during PM-runtime suspend of a consumer device, but it
introduced a race condition potentially leading to unexpected
behavior (Rafael Wysocki)"
* tag 'pm-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "PM: runtime: Update device status before letting suppliers suspend"
Revert "PM: ACPI: reboot: Use S5 for reboot"
Linus Torvalds [Fri, 19 Mar 2021 16:56:04 +0000 (09:56 -0700)]
Merge tag 'iommu-fixes-v5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
- Three AMD IOMMU patches to fix a boot crash on AMD Stoney systems and
every other AMD IOMMU system booted with 'amd_iommu=off'.
This is a v5.11 regression.
- A Fix for the Tegra IOMMU driver to make sure it detects all IOMMUs
* tag 'iommu-fixes-v5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/tegra-smmu: Make tegra_smmu_probe_device() to handle all IOMMU phandles
iommu/amd: Keep track of amd_iommu_irq_remap state
iommu/amd: Don't call early_amd_iommu_init() when AMD IOMMU is disabled
iommu/amd: Move Stoney Ridge check to detect_ivrs()
Linus Torvalds [Fri, 19 Mar 2021 16:53:32 +0000 (09:53 -0700)]
Merge tag 'sound-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"The majority of changes are various ASoC device/platform-specific
small fixes (including a removal of stale file) while the only common
change is a clk management fix in ASoC simple-card driver.
The rest are the usual HD-audio quirks"
* tag 'sound-5.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (44 commits)
ALSA: usb-audio: Fix unintentional sign extension issue
ALSA: hda/realtek: fix mute/micmute LEDs for HP 850 G8
ASoC: dt-bindings: fsl_spdif: Add compatible string for new platforms
ASoC: rt711: add snd_soc_component remove callback
ASoC: rt5659: Update MCLK rate in set_sysclk()
ASoC: simple-card-utils: Do not handle device clock
ALSA: hda/realtek: fix mute/micmute LEDs for HP 440 G8
ALSA: hda/realtek: fix mute/micmute LEDs for HP 840 G8
ALSA: hda/realtek: apply pin quirk for XiaomiNotebook Pro
ALSA: hda/realtek: Apply headset-mic quirks for Xiaomi Redmibook Air
ASoC: mediatek: mt8192: fix tdm out data is valid on rising edge
ALSA: dice: fix null pointer dereference when node is disconnected
ALSA: hda: generic: Fix the micmute led init state
ASoC: qcom: lpass-cpu: Fix lpass dai ids parse
spi: cadence: set cqspi to the driver_data field of struct device
ASoC: SOF: intel: fix wrong poll bits in dsp power down
ASoC: codecs: wcd934x: add a sanity check in set channel map
ASoC: qcom: sdm845: Fix array out of range on rx slim channels
ASoC: qcom: sdm845: Fix array out of bounds access
ASoC: remove remnants of sirf prima/atlas audio codec
...
Steve French [Fri, 19 Mar 2021 05:05:48 +0000 (00:05 -0500)]
cifs: fix allocation size on newly created files
Applications that create and extend and write to a file do not
expect to see 0 allocation size. When file is extended,
set its allocation size to a plausible value until we have a
chance to query the server for it. When the file is cached
this will prevent showing an impossible number of allocated
blocks (like 0). This fixes e.g. xfstests 614 which does
1) create a file and set its size to 64K
2) mmap write 64K to the file
3) stat -c %b for the file (to query the number of allocated blocks)
It was failing because we returned 0 blocks. Even though we would
return the correct cached file size, we returned an impossible
allocation size.
Signed-off-by: Steve French <stfrench@microsoft.com> CC: <stable@vger.kernel.org> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Revert "PM: runtime: Update device status before letting suppliers suspend"
Revert commit ed70122b7be4 ("PM: runtime: Update device status
before letting suppliers suspend") that introduced a race condition
into __rpm_callback() which allowed a concurrent rpm_resume() to
run and resume the device prematurely after its status had been
changed to RPM_SUSPENDED by __rpm_callback().
Fixes: ed70122b7be4 ("PM: runtime: Update device status before letting suppliers suspend") Link: https://lore.kernel.org/linux-pm/24dfb6fc-5d54-6ee2-9195-26428b7ecf8a@intel.com/ Reported-by: Adrian Hunter <adrian.hunter@intel.com> Cc: 4.10+ <stable@vger.kernel.org> # 4.10+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Ingo Molnar [Fri, 19 Mar 2021 13:23:46 +0000 (14:23 +0100)]
Merge tag 'efi-urgent-for-v5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/urgent
Pull EFI fixes from Ard Biesheuvel:
"- another missing RT_PROP table related fix, to ensure that the efivarfs
pseudo filesystem fails gracefully if variable services are unsupported
- use the correct alignment for literal EFI GUIDs
- fix a use after unmap issue in the memreserve code"
Jens Axboe [Fri, 19 Mar 2021 12:40:47 +0000 (06:40 -0600)]
Merge tag 'nvme-5.12-20210319' of git://git.infradead.org/nvme into block-5.12
Pull NVMe updates from Christoph:
"nvme fixes for 5.12
- fix tag allocation for keep alive
- fix a unit mismatch for the Write Zeroes limits
- various TCP transport fixes (Sagi Grimberg, Elad Grupi)
- fix iosqes and iocqes validation for discovery controllers (Sagi Grimberg)"
* tag 'nvme-5.12-20210319' of git://git.infradead.org/nvme:
nvmet-tcp: fix kmap leak when data digest in use
nvmet: don't check iosqes,iocqes for discovery controllers
nvme-rdma: fix possible hang when failing to set io queues
nvme-tcp: fix possible hang when failing to set io queues
nvme-tcp: fix misuse of __smp_processor_id with preemption enabled
nvme-tcp: fix a NULL deref when receiving a 0-length r2t PDU
nvme: fix Write Zeroes limitations
nvme: allocate the keep alive request using BLK_MQ_REQ_NOWAIT
nvme: merge nvme_keep_alive into nvme_keep_alive_work
nvme-fabrics: only reserve a single tag
Sites that match init_section_contains() get marked as INIT. For
built-in code init_sections contains both __init and __exit text. OTOH
kernel_text_address() only explicitly includes __init text (and there
are no __exit text markers).
Match what jump_label already does and ignore the warning for INIT
sites. Also see the excellent changelog for commit: f4e34a209b86
("jump_label: Don't warn on __exit jump entries")
The intent is to avoid writing init code after init (because the text
might have been freed). The code is needlessly different between
jump_label and static_call and not obviously correct.
The existing code relies on the fact that the module loader clears the
init layout, such that within_module_init() always fails, while
jump_label relies on the module state which is more obvious and
matches the kernel logic.
Thomas Gleixner [Thu, 18 Mar 2021 19:26:47 +0000 (20:26 +0100)]
x86/ioapic: Ignore IRQ2 again
Vitaly ran into an issue with hotplugging CPU0 on an Amazon instance where
the matrix allocator claimed to be out of vectors. He analyzed it down to
the point that IRQ2, the PIC cascade interrupt, which is supposed to be not
ever routed to the IO/APIC ended up having an interrupt vector assigned
which got moved during unplug of CPU0.
The underlying issue is that IRQ2 for various reasons (see commit 22c7fdd9b292 ("x86: I/O APIC: Never configure IRQ2" for details) is treated
as a reserved system vector by the vector core code and is not accounted as
a regular vector. The Amazon BIOS has an routing entry of pin2 to IRQ2
which causes the IO/APIC setup to claim that interrupt which is granted by
the vector domain because there is no sanity check. As a consequence the
allocation counter of CPU0 underflows which causes a subsequent unplug to
fail with:
[ ... ] CPU 0 has 4294967295 vectors, 589 available. Cannot disable CPU
There is another sanity check missing in the matrix allocator, but the
underlying root cause is that the IO/APIC code lost the IRQ2 ignore logic
during the conversion to irqdomains.
For almost 6 years nobody complained about this wreckage, which might
indicate that this requirement could be lifted, but for any system which
actually has a PIC IRQ2 is unusable by design so any routing entry has no
effect and the interrupt cannot be connected to a device anyway.
Due to that and due to history biased paranoia reasons restore the IRQ2
ignore logic and treat it as non existent despite a routing entry claiming
otherwise.
Fixes: 3a8ec19c7f94 ("x86/irq: Convert IOAPIC to use hierarchical irqdomain interfaces") Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210318192819.636943062@linutronix.de
Ard Biesheuvel [Wed, 10 Mar 2021 07:33:19 +0000 (08:33 +0100)]
efi: use 32-bit alignment for efi_guid_t literals
Commit 37f5e7894542 ("efi: Use 32-bit alignment for efi_guid_t") updated
the type definition of efi_guid_t to ensure that it always appears
sufficiently aligned (the UEFI spec is ambiguous about this, but given
the fact that its EFI_GUID type is defined in terms of a struct carrying
a uint32_t, the natural alignment is definitely >= 32 bits).
However, we missed the EFI_GUID() macro which is used to instantiate
efi_guid_t literals: that macro is still based on the guid_t type,
which does not have a minimum alignment at all. This results in warnings
such as
In file included from drivers/firmware/efi/mokvar-table.c:35:
include/linux/efi.h:1093:34: warning: passing 1-byte aligned argument to
4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer
access [-Walign-mismatch]
status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size,
^
include/linux/efi.h:1101:24: warning: passing 1-byte aligned argument to
4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer
access [-Walign-mismatch]
get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode);
The distinction only matters on CPUs that do not support misaligned loads
fully, but 32-bit ARM's load-multiple instructions fall into that category,
and these are likely to be emitted by the compiler that built the firmware
for loading word-aligned 128-bit GUIDs from memory
So re-implement the initializer in terms of our own efi_guid_t type, so that
the alignment becomes a property of the literal's type.
Fixes: 37f5e7894542 ("efi: Use 32-bit alignment for efi_guid_t") Reported-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Tested-by: Nathan Chancellor <nathan@kernel.org> Link: https://github.com/ClangBuiltLinux/linux/issues/1327 Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Linus Torvalds [Fri, 19 Mar 2021 00:57:34 +0000 (17:57 -0700)]
Merge tag 'drm-fixes-2021-03-19' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Regular fixes pull, pretty small set of fixes, a couple of i915 and
amdgpu, one ttm, one nouveau and one omap. Probably smaller than usual
for this time, so we'll see if something pops up next week or if this
will continue to stay small.
Summary:
ttm:
- Make ttm_bo_unpin() not wraparound on too many unpins
i915:
- Workaround async flip + VT-d frame corruption on HSW/BDW
- Fix NMI watchdog crash due to uninitialized OA buffer use on gen12+
nouveau:
- workaround oops with bo syncing"
* tag 'drm-fixes-2021-03-19' of git://anongit.freedesktop.org/drm/drm:
nouveau: Skip unvailable ttm page entries
drm/amd/display: Remove MPC gamut remap logic for DCN30
drm/amd/display: Correct algorithm for reversed gamma
drm/omap: dsi: fix unsigned expression compared with zero
i915/perf: Start hrtimer only if sampling the OA buffer
drm/i915: Workaround async flip + VT-d corruption on HSW/BDW
drm/amd/display: Copy over soc values before bounding box creation
drm/ttm: make ttm_bo_unpin more defensive
The underlying problem is not introduced by the commit, yet it uncovered the
underlying issue. The cited commit relies on valid pages. This is not given for
due to some bugs. For now, just warn and work around the issue by just ignoring
the bad ttm objects.
Below is some debug info gathered while debugging this issue:
nouveau 0000:01:00.0: DRM: ttm_dma->num_pages: 2048
nouveau 0000:01:00.0: DRM: ttm_dma->pages is NULL
nouveau 0000:01:00.0: DRM: ttm_dma: 00000000e96058e7
nouveau 0000:01:00.0: DRM: ttm_dma->page_flags:
nouveau 0000:01:00.0: DRM: ttm_dma: Populated: 1
nouveau 0000:01:00.0: DRM: ttm_dma: No Retry: 0
nouveau 0000:01:00.0: DRM: ttm_dma: SG: 256
nouveau 0000:01:00.0: DRM: ttm_dma: Zero Alloc: 0
nouveau 0000:01:00.0: DRM: ttm_dma: Swapped: 0
Dave Airlie [Fri, 19 Mar 2021 00:33:32 +0000 (10:33 +1000)]
Merge tag 'drm-intel-fixes-2021-03-18' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
drm/i915 fixes for v5.12-rc4:
- Workaround async flip + VT-d frame corruption on HSW/BDW
- Fix NMI watchdog crash due to uninitialized OA buffer use on gen12+
Linus Torvalds [Thu, 18 Mar 2021 20:38:42 +0000 (13:38 -0700)]
Merge tag 'for-5.12-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"There are still regressions being found and fixed in the zoned mode
and subpage code, the rest are fixes for bugs reported by users.
Regressions:
- subpage block support:
- readahead works on the proper block size
- fix last page zeroing
- zoned mode:
- linked list corruption for tree log
Fixes:
- qgroup leak after falloc failure
- tree mod log and backref resolving:
- extent buffer cloning race when resolving backrefs
- pin deleted leaves with active tree mod log users
- drop debugging flag from slab cache"
* tag 'for-5.12-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: always pin deleted leaves when there are active tree mod log users
btrfs: fix race when cloning extent buffer during rewind of an old root
btrfs: fix slab cache flags for free space tree bitmap
btrfs: subpage: make readahead work properly
btrfs: subpage: fix wild pointer access during metadata read failure
btrfs: zoned: fix linked list corruption after log root tree allocation failure
btrfs: fix qgroup data rsv leak caused by falloc failure
btrfs: track qgroup released data in own variable in insert_prealloc_file_extent
btrfs: fix wrong offset to zero out range beyond i_size
Linus Torvalds [Thu, 18 Mar 2021 19:37:05 +0000 (12:37 -0700)]
Merge tag 'vfio-v5.12-rc4' of git://github.com/awilliam/linux-vfio
Pull VFIO fixes from Alex Williamson:
- Fix 32-bit issue with new unmap-all flag (Steve Sistare)
- Various Kconfig changes for better coverage (Jason Gunthorpe)
- Fix to batch pinning support (Daniel Jordan)
* tag 'vfio-v5.12-rc4' of git://github.com/awilliam/linux-vfio:
vfio/type1: fix vaddr_get_pfns() return in vfio_pin_page_external()
vfio: Depend on MMU
ARM: amba: Allow some ARM_AMBA users to compile with COMPILE_TEST
vfio-platform: Add COMPILE_TEST to VFIO_PLATFORM
vfio: IOMMU_API should be selected
vfio/type1: fix unmap all on ILP32
Linus Torvalds [Thu, 18 Mar 2021 19:32:51 +0000 (12:32 -0700)]
Merge tag 'xfs-5.12-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"A couple of minor corrections for the new idmapping functionality, and
a fix for a theoretical hang that could occur if we decide to abort a
mount after dirtying the quota inodes.
Summary:
- Fix quota accounting on creat() when id mapping is enabled
- Actually reclaim dirty quota inodes when mount fails
- Typo fixes for documentation
- Restrict both bulkstat calls on idmapped/namespaced mounts"
* tag 'xfs-5.12-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: also reject BULKSTAT_SINGLE in a mount user namespace
docs: ABI: Fix the spelling oustanding to outstanding in the file sysfs-fs-xfs
xfs: force log and push AIL to clear pinned inodes when aborting mount
xfs: fix quota accounting when a mount is idmapped
Linus Torvalds [Thu, 18 Mar 2021 18:20:35 +0000 (11:20 -0700)]
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixes from Michael Tsirkin:
"Some fixes and cleanups all over the place"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost-vdpa: set v->config_ctx to NULL if eventfd_ctx_fdget() fails
vhost-vdpa: fix use-after-free of v->config_ctx
vhost: Fix vhost_vq_reset()
vhost_vdpa: fix the missing irq_bypass_unregister_producer() invocation
vdpa_sim: Skip typecasting from void*
virtio: remove export for virtio_config_{enable, disable}
virtio-mmio: Use to_virtio_mmio_device() to simply code
vdpa: set the virtqueue num during register
The new consistency checking, expects local_irq_save() and
local_irq_restore() to be paired and sanely nested, and therefore expects
local_irq_restore() to be called with irqs disabled.
The irqflags handling in kvm_wait() which ends up doing:
Wanpeng Li [Fri, 12 Mar 2021 02:45:51 +0000 (10:45 +0800)]
KVM: X86: Fix missing local pCPU when executing wbinvd on all dirty pCPUs
In order to deal with noncoherent DMA, we should execute wbinvd on
all dirty pCPUs when guest wbinvd exits to maintain data consistency.
smp_call_function_many() does not execute the provided function on the
local core, therefore replace it by on_each_cpu_mask().
Reported-by: Nadav Amit <namit@vmware.com> Cc: Nadav Amit <namit@vmware.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1615517151-7465-1-git-send-email-wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86: Protect userspace MSR filter with SRCU, and set atomically-ish
Fix a plethora of issues with MSR filtering by installing the resulting
filter as an atomic bundle instead of updating the live filter one range
at a time. The KVM_X86_SET_MSR_FILTER ioctl() isn't truly atomic, as
the hardware MSR bitmaps won't be updated until the next VM-Enter, but
the relevant software struct is atomically updated, which is what KVM
really needs.
Similar to the approach used for modifying memslots, make arch.msr_filter
a SRCU-protected pointer, do all the work configuring the new filter
outside of kvm->lock, and then acquire kvm->lock only when the new filter
has been vetted and created. That way vCPU readers either see the old
filter or the new filter in their entirety, not some half-baked state.
Yuan Yao pointed out a use-after-free in ksm_msr_allowed() due to a
TOCTOU bug, but that's just the tip of the iceberg...
- Nothing is __rcu annotated, making it nigh impossible to audit the
code for correctness.
- kvm_add_msr_filter() has an unpaired smp_wmb(). Violation of kernel
coding style aside, the lack of a smb_rmb() anywhere casts all code
into doubt.
- kvm_clear_msr_filter() has a double free TOCTOU bug, as it grabs
count before taking the lock.
- kvm_clear_msr_filter() also has memory leak due to the same TOCTOU bug.
The entire approach of updating the live filter is also flawed. While
installing a new filter is inherently racy if vCPUs are running, fixing
the above issues also makes it trivial to ensure certain behavior is
deterministic, e.g. KVM can provide deterministic behavior for MSRs with
identical settings in the old and new filters. An atomic update of the
filter also prevents KVM from getting into a half-baked state, e.g. if
installing a filter fails, the existing approach would leave the filter
in a half-baked state, having already committed whatever bits of the
filter were already processed.
Linus Torvalds [Thu, 18 Mar 2021 17:37:30 +0000 (10:37 -0700)]
Merge branch 'iomap-5.12-fixes' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull iomap fix from Darrick Wong:
"A single fix to the iomap code which fixes some drama when someone
gives us a {de,ma}liciously fragmented swap file"
* 'iomap-5.12-fixes' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
iomap: Fix negative assignment to unsigned sis->pages in iomap_swapfile_activate
workqueue/tracing: Copy workqueue name to buffer in trace event
The trace event "workqueue_queue_work" references an unsafe string in
dereferencing the name of the workqueue. As the name is allocated, it
could later be freed, and the pointer to that string could stay on the
tracing buffer. If the trace buffer is read after the string is freed, it
will reference an unsafe pointer.
I added a new verifier to make sure that all strings referenced in the
output of the trace buffer is safe to read and this triggered on the
workqueue_queue_work trace event:
workqueue_queue_work: work struct=00000000b2b235c7 function=gc_worker workqueue=(0xffff888100051160:events_power_efficient)[UNSAFE-MEMORY] req_cpu=256 cpu=1
workqueue_queue_work: work struct=00000000c344caec function=flush_to_ldisc workqueue=(0xffff888100054d60:events_unbound)[UNSAFE-MEMORY] req_cpu=256 cpu=4294967295
workqueue_queue_work: work struct=00000000b2b235c7 function=gc_worker workqueue=(0xffff888100051160:events_power_efficient)[UNSAFE-MEMORY] req_cpu=256 cpu=1
workqueue_queue_work: work struct=000000000b238b3f function=vmstat_update workqueue=(0xffff8881000c3760:mm_percpu_wq)[UNSAFE-MEMORY] req_cpu=1 cpu=1
Also, if this event is read via a user space application like perf or
trace-cmd, the name would only be an address and useless information:
workqueue_queue_work: work struct=0xffff953f80b4b918 function=disk_events_workfn workqueue=ffff953f8005d378 req_cpu=8192 cpu=5
Cc: Zqiang <qiang.zhang@windriver.com> Cc: Tejun Heo <tj@kernel.org> Fixes: 58700f3ca66ab ("workqueue: tracing the name of the workqueue instead of it's address") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This patch causes a panic when rebooting my Dell Poweredge r440. I do
not have the full panic log as it's lost at that stage of the reboot and
I do not have a serial console. Reverting this patch makes my system
able to reboot again.
Signed-off-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Pavel Begunkov [Thu, 18 Mar 2021 11:54:35 +0000 (11:54 +0000)]
io_uring: don't leak creds on SQO attach error
Attaching to already dead/dying SQPOLL task is disallowed in
io_sq_offload_create(), but cleanup is hand coded by calling
io_put_sq_data()/etc., that miss to put ctx->sq_creds.
Defer everything to error-path io_sq_thread_finish(), adding
ctx->sqd_list in the error case as well as finish will handle it.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Introduce a new selftest for Hyper-V clocksources (MSR-based reference TSC
and TSC page). As a starting point, test the following:
1) Reference TSC is 1Ghz clock.
2) Reference TSC and TSC page give the same reading.
3) TSC page gets updated upon KVM_SET_CLOCK call.
4) TSC page does not get updated when guest opted for reenlightenment.
5) Disabled TSC page doesn't get updated.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210318140949.1065740-1-vkuznets@redhat.com>
[Add a host-side test using TSC + KVM_GET_MSR too. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The shifting of the u8 integer device by 24 bits to the left will
be promoted to a 32 bit signed int and then sign-extended to a
64 bit unsigned long. In the event that the top bit of device is
set then all then all the upper 32 bits of the unsigned long will
end up as also being set because of the sign-extension. Fix this
by casting device to an unsigned long before the shift.
Addresses-Coverity: ("Unintended sign extension") Fixes: 412ace181690 ("ALSA: usb-audio: Add DJM750 to Pioneer mixer quirk") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20210318132008.15266-1-colin.king@canonical.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Thu, 18 Mar 2021 13:12:11 +0000 (14:12 +0100)]
Merge tag 'asoc-fix-v5.12-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v5.12
Quite a lot of mostly platform specific fixes here, the only one which
is generic is a fix for regressions on devices with more complex
clocking support with simple-card. There's also a few new device IDs
and platform quirks.
Vitaly Kuznetsov [Tue, 16 Mar 2021 14:37:36 +0000 (15:37 +0100)]
KVM: x86: hyper-v: Don't touch TSC page values when guest opted for re-enlightenment
When guest opts for re-enlightenment notifications upon migration, it is
in its right to assume that TSC page values never change (as they're only
supposed to change upon migration and the host has to keep things as they
are before it receives confirmation from the guest). This is mostly true
until the guest is migrated somewhere. KVM userspace (e.g. QEMU) will
trigger masterclock update by writing to HV_X64_MSR_REFERENCE_TSC, by
calling KVM_SET_CLOCK,... and as TSC value and kvmclock reading drift
apart (even slightly), the update causes TSC page values to change.
The issue at hand is that when Hyper-V is migrated, it uses stale (cached)
TSC page values to compute the difference between its own clocksource
(provided by KVM) and its guests' TSC pages to program synthetic timers
and in some cases, when TSC page is updated, this puts all stimer
expirations in the past. This, in its turn, causes an interrupt storm
and L2 guests not making much forward progress.
Note, KVM doesn't fully implement re-enlightenment notification. Basically,
the support for reenlightenment MSRs is just a stub and userspace is only
expected to expose the feature when TSC scaling on the expected destination
hosts is available. With TSC scaling, no real re-enlightenment is needed
as TSC frequency doesn't change. With TSC scaling becoming ubiquitous, it
likely makes little sense to fully implement re-enlightenment in KVM.
Prevent TSC page from being updated after migration. In case it's not the
guest who's initiating the change and when TSC page is already enabled,
just keep it as it is: TSC value is supposed to be preserved across
migration and TSC frequency can't change with re-enlightenment enabled.
The guest is doomed anyway if any of this is not true.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210316143736.964151-5-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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