Keep this together with the first place that actually looks at
->minors and prepare for not passing a minors argument to
alloc_disk.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Untangle the mess around blk_alloc_devt by moving the check for
the used allocation scheme into the callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The tags used for an IO scheduler are currently per hctx.
As such, when q->nr_hw_queues grows, so does the request queue total IO
scheduler tag depth.
This may cause problems for SCSI MQ HBAs whose total driver depth is
fixed.
Ming and Yanhui report higher CPU usage and lower throughput in scenarios
where the fixed total driver tag depth is appreciably lower than the total
scheduler tag depth:
https://lore.kernel.org/linux-block/440dfcfc-1a2c-bd98-1161-cec4d78c6dfc@huawei.com/T/#mc0d6d4f95275a2743d1c8c3e4dc9ff6c9aa3a76b
In that scenario, since the scheduler tag is got first, much contention
is introduced since a driver tag may not be available after we have got
the sched tag.
Improve this scenario by introducing request queue-wide tags for when
a tagset-wide sbitmap is used. The static sched requests are still
allocated per hctx, as requests are initialised per hctx, as in
blk_mq_init_request(..., hctx_idx, ...) ->
set->ops->init_request(.., hctx_idx, ...).
For simplicity of resizing the request queue sbitmap when updating the
request queue depth, just init at the max possible size, so we don't need
to deal with the possibly with swapping out a new sbitmap for old if
we need to grow.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/1620907258-30910-3-git-send-email-john.garry@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The tag allocation code to alloc the sbitmap pairs is common for regular
bitmaps tags and shared sbitmap, so refactor into a common function.
Also remove superfluous "flags" argument from blk_mq_init_shared_sbitmap().
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/1620907258-30910-2-git-send-email-john.garry@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Before we free request queue, clearing flush request reference in
tags->rqs[], so that potential UAF can be avoided.
Based on one patch written by David Jeffery.
Tested-by: John Garry <john.garry@huawei.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210511152236.763464-5-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
refcount_inc_not_zero() in bt_tags_iter() still may read one freed
request.
Fix the issue by the following approach:
1) hold a per-tags spinlock when reading ->rqs[tag] and calling
refcount_inc_not_zero in bt_tags_iter()
2) clearing stale request referred via ->rqs[tag] before freeing
request pool, the per-tags spinlock is held for clearing stale
->rq[tag]
So after we cleared stale requests, bt_tags_iter() won't observe
freed request any more, also the clearing will wait for pending
request reference.
The idea of clearing ->rqs[] is borrowed from John Garry's previous
patch and one recent David's patch.
Tested-by: John Garry <john.garry@huawei.com>
Reviewed-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210511152236.763464-4-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Grab rq->refcount before calling ->fn in blk_mq_tagset_busy_iter(), and
this way will prevent the request from being re-used when ->fn is
running. The approach is same as what we do during handling timeout.
Fix request use-after-free(UAF) related with completion race or queue
releasing:
- If one rq is referred before rq->q is frozen, then queue won't be
frozen before the request is released during iteration.
- If one rq is referred after rq->q is frozen, refcount_inc_not_zero()
will return false, and we won't iterate over this request.
However, still one request UAF not covered: refcount_inc_not_zero() may
read one freed request, and it will be handled in next patch.
Tested-by: John Garry <john.garry@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210511152236.763464-3-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
For flush request, rq->end_io() may be called two times, one is from
timeout handling(blk_mq_check_expired()), another is from normal
completion(__blk_mq_end_request()).
Move blk_account_io_flush() after flush_rq->ref drops to zero, so
io accounting can be done just once for flush request.
Fixes: b686631865 ("block: add iostat counters for flush requests")
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: John Garry <john.garry@huawei.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210511152236.763464-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
blkcg has always rejected to attach if any of the member tasks has shared
io_context. The rationale was that io_contexts can be shared across
different cgroups making it impossible to define what the appropriate
control behavior should be. However, this check causes more problems than it
solves:
* The check prevents controller enable and migrations but not CLONE_IO
itself, which can lead to surprises as the outcome changes depending on
the order of operations.
* Sharing within a cgroup is fine but the check can't distinguish that. This
leads to unnecessary conflicts with the recent CLONE_IO usage in io_uring.
io_context sharing doesn't make any difference for rq_qos based controllers
and the way it's used is safe as long as tasks aren't migrated dynamically
which is the vast majority of use cases. While we can try to make the check
more precise to avoid false positives, the added complexity doesn't seem
worthwhile. Let's just drop blkcg_can_attach().
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/YJrTvHbrRDbJjw+S@slm.duckdns.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The mutex ktio_spawn_lock is initialized statically.
It is unnecessary to initialize by mutex_init().
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210511113440.3772053-1-yangyingliang@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Now block_dump feature is gone, remove all comments in docs.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210313030146.2882027-4-yi.zhang@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
We have already delete block_dump feature in mark_inode_dirty() because
it can be replaced by tracepoints, now we also remove the part in
submit_bio() for the same reason. The part of block dump feature in
submit_bio() dump the write process, write region and sectors on the
target disk into kernel message. it can be replaced by
block_bio_queue tracepoint in submit_bio_checks(), so we do not need
block_dump anymore, remove the whole block_dump feature.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210313030146.2882027-3-yi.zhang@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block_dump is an old debugging interface, one of it's functions is used
to print the information about who write which file on disk. If we
enable block_dump through /proc/sys/vm/block_dump and turn on debug log
level, we can gather information about write process name, target file
name and disk from kernel message. This feature is realized in
block_dump___mark_inode_dirty(), it print above information into kernel
message directly when marking inode dirty, so it is noisy and can easily
trigger log storm. At the same time, get the dentry refcount is also not
safe, we found it will lead to deadlock on ext4 file system with
data=journal mode.
After tracepoints has been introduced into the kernel, we got a
tracepoint in __mark_inode_dirty(), which is a better replacement of
block_dump___mark_inode_dirty(). The only downside is that it only trace
the inode number and not a file name, but it probably doesn't matter
because the original printed file name in block_dump is not accurate in
some cases, and we can still find it through the inode number and device
id. So this patch delete the dirting inode part of block_dump feature.
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210313030146.2882027-2-yi.zhang@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Do not check the LBR_TOS MSR when setting up unrelated LBR MSRs as this
can cause malfunction when TOS is not supported.
- Allocate the LBR XSAVE buffers along with the DS buffers upfront because
allocating them when adding an event can deadlock.
-----BEGIN PGP SIGNATURE-----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=7WGT
-----END PGP SIGNATURE-----
Merge tag 'perf-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"Two perf fixes:
- Do not check the LBR_TOS MSR when setting up unrelated LBR MSRs as
this can cause malfunction when TOS is not supported
- Allocate the LBR XSAVE buffers along with the DS buffers upfront
because allocating them when adding an event can deadlock"
* tag 'perf-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/lbr: Remove cpuc->lbr_xsave allocation from atomic context
perf/x86: Avoid touching LBR_TOS MSR for Arch LBR
- Invoke the lockdep tracepoints in the correct place so the ordering
is correct again.
- Don't leave the mutex WAITER bit stale when the last waiter is dropping
out early due to a signal as that forces all subsequent lock operations
needlessly into the slowpath until it's cleaned up again.
-----BEGIN PGP SIGNATURE-----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=7vqW
-----END PGP SIGNATURE-----
Merge tag 'locking-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"Two locking fixes:
- Invoke the lockdep tracepoints in the correct place so the ordering
is correct again
- Don't leave the mutex WAITER bit stale when the last waiter is
dropping out early due to a signal as that forces all subsequent
lock operations needlessly into the slowpath until it's cleaned up
again"
* tag 'locking-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal
locking/lockdep: Correct calling tracepoints
- Allocate interrupt descriptors correctly on Mainstone PXA when
SPARSE_IRQ is enabled; otherwise the interrupt association fails.
- Make the APPLE AIC chip driver depend on APPLE.
- Remove redundant error output on devm_ioremap_resource() failure.
-----BEGIN PGP SIGNATURE-----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=XjHi
-----END PGP SIGNATURE-----
Merge tag 'irq-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"A few fixes for irqchip drivers:
- Allocate interrupt descriptors correctly on Mainstone PXA when
SPARSE_IRQ is enabled; otherwise the interrupt association fails
- Make the APPLE AIC chip driver depend on APPLE
- Remove redundant error output on devm_ioremap_resource() failure"
* tag 'irq-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: Remove redundant error printing
irqchip/apple-aic: APPLE_AIC should depend on ARCH_APPLE
ARM: PXA: Fix cplds irqdesc allocation when using legacy mode
of killing the machine and by using the accessors with the exact functionality
needed when accessing memory.
- Fix a confusion with Clang LTO compiler switches passed to the it
- Handle the case gracefully when VMGEXIT has been executed in userspace
-----BEGIN PGP SIGNATURE-----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=51BK
-----END PGP SIGNATURE-----
Merge tag 'x86_urgent_for_v5.13_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Fix how SEV handles MMIO accesses by forwarding potential page faults
instead of killing the machine and by using the accessors with the
exact functionality needed when accessing memory.
- Fix a confusion with Clang LTO compiler switches passed to the it
- Handle the case gracefully when VMGEXIT has been executed in
userspace
* tag 'x86_urgent_for_v5.13_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/sev-es: Use __put_user()/__get_user() for data accesses
x86/sev-es: Forward page-faults which happen during emulation
x86/sev-es: Don't return NULL from sev_es_get_ghcb()
x86/build: Fix location of '-plugin-opt=' flags
x86/sev-es: Invalidate the GHCB after completing VMGEXIT
x86/sev-es: Move sev_es_put_ghcb() in prep for follow on patch
Fix breakage of strace (and other ptracers etc.) when using the new scv ABI (Power9 or
later with glibc >= 2.33).
Fix early_ioremap() on 64-bit, which broke booting on some machines.
Thanks to: Dmitry V. Levin, Nicholas Piggin, Alexey Kardashevskiy, Christophe Leroy.
-----BEGIN PGP SIGNATURE-----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=qeQq
-----END PGP SIGNATURE-----
Merge tag 'powerpc-5.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix breakage of strace (and other ptracers etc.) when using the new
scv ABI (Power9 or later with glibc >= 2.33).
- Fix early_ioremap() on 64-bit, which broke booting on some machines.
Thanks to Dmitry V. Levin, Nicholas Piggin, Alexey Kardashevskiy, and
Christophe Leroy.
* tag 'powerpc-5.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s/syscall: Fix ptrace syscall info with scv syscalls
powerpc/64s/syscall: Use pt_regs.trap to distinguish syscall ABI difference between sc and scv syscalls
powerpc: Fix early setup to make early_ioremap() work
Merge misc fixes from Andrew Morton:
"10 patches.
Subsystems affected by this patch series: mm (pagealloc, gup, kasan,
and userfaultfd), ipc, selftests, watchdog, bitmap, procfs, and lib"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
userfaultfd: hugetlbfs: fix new flag usage in error path
lib: kunit: suppress a compilation warning of frame size
proc: remove Alexey from MAINTAINERS
linux/bits.h: fix compilation error with GENMASK
watchdog: reliable handling of timestamps
kasan: slab: always reset the tag in get_freepointer_safe()
tools/testing/selftests/exec: fix link error
ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
Revert "mm/gup: check page posion status for coredump."
mm/shuffle: fix section mismatch warning
In commit d6995da311 ("hugetlb: use page.private for hugetlb specific
page flags") the use of PagePrivate to indicate a reservation count
should be restored at free time was changed to the hugetlb specific flag
HPageRestoreReserve. Changes to a userfaultfd error path as well as a
VM_BUG_ON() in remove_inode_hugepages() were overlooked.
Users could see incorrect hugetlb reserve counts if they experience an
error with a UFFDIO_COPY operation. Specifically, this would be the
result of an unlikely copy_huge_page_from_user error. There is not an
increased chance of hitting the VM_BUG_ON.
Link: https://lkml.kernel.org/r/20210521233952.236434-1-mike.kravetz@oracle.com
Fixes: d6995da311 ("hugetlb: use page.private for hugetlb specific page flags")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Mina Almasry <almasry.mina@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mina Almasry <almasrymina@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>
lib/bitfield_kunit.c: In function `test_bitfields_constants':
lib/bitfield_kunit.c:93:1: warning: the frame size of 7456 bytes is larger than 2048 bytes [-Wframe-larger-than=]
}
^
As the description of BITFIELD_KUNIT in lib/Kconfig.debug, it "Only useful
for kernel devs running the KUnit test harness, and not intended for
inclusion into a production build". Therefore, it is not worth modifying
variable 'test_bitfields_constants' to clear this warning. Just suppress
it.
Link: https://lkml.kernel.org/r/20210518094533.7652-1-thunder.leizhen@huawei.com
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Vitor Massaru Iha <vitor@massaru.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
People Cc me and I don't have time.
Link: https://lkml.kernel.org/r/YKarMxHJBIhMHQIh@localhost.localdomain
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
GENMASK() has an input check which uses __builtin_choose_expr() to
enable a compile time sanity check of its inputs if they are known at
compile time.
However, it turns out that __builtin_constant_p() does not always return
a compile time constant [0]. It was thought this problem was fixed with
gcc 4.9 [1], but apparently this is not the case [2].
Switch to use __is_constexpr() instead which always returns a compile time
constant, regardless of its inputs.
Link: https://lore.kernel.org/lkml/42b4342b-aefc-a16a-0d43-9f9c0d63ba7a@rasmusvillemoes.dk [0]
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19449 [1]
Link: https://lore.kernel.org/lkml/1ac7bbc2-45d9-26ed-0b33-bf382b8d858b@I-love.SAKURA.ne.jp [2]
Link: https://lkml.kernel.org/r/20210511203716.117010-1-rikard.falkeborn@gmail.com
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 9bf3bc949f ("watchdog: cleanup handling of false positives")
tried to handle a virtual host stopped by the host a more
straightforward and cleaner way.
But it introduced a risk of false softlockup reports. The virtual host
might be stopped at any time, for example between
kvm_check_and_clear_guest_paused() and is_softlockup(). As a result,
is_softlockup() might read the updated jiffies and detects a softlockup.
A solution might be to put back kvm_check_and_clear_guest_paused() after
is_softlockup() and detect it. But it would put back the cycle that
complicates the logic.
In fact, the handling of all the timestamps is not reliable. The code
does not guarantee when and how many times the timestamps are read. For
example, "period_ts" might be touched anytime also from NMI and re-read in
is_softlockup(). It works just by chance.
Fix all the problems by making the code even more explicit.
1. Make sure that "now" and "period_ts" timestamps are read only once.
They might be changed at anytime by NMI or when the virtual guest is
stopped by the host. Note that "now" timestamp does this implicitly
because "jiffies" is marked volatile.
2. "now" time must be read first. The state of "period_ts" will
decide whether it will be used or the period will get restarted.
3. kvm_check_and_clear_guest_paused() must be called before reading
"period_ts". It touches the variable when the guest was stopped.
As a result, "now" timestamp is used only when the watchdog was not
touched and the guest not stopped in the meantime. "period_ts" is
restarted in all other situations.
Link: https://lkml.kernel.org/r/YKT55gw+RZfyoFf7@alley
Fixes: 9bf3bc949f ("watchdog: cleanup handling of false positives")
Signed-off-by: Petr Mladek <pmladek@suse.com>
Reported-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
With CONFIG_DEBUG_PAGEALLOC enabled, the kernel should also untag the
object pointer, as done in get_freepointer().
Failing to do so reportedly leads to SLUB freelist corruptions that
manifest as boot-time crashes.
Link: https://lkml.kernel.org/r/20210514072228.534418-1-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Elliot Berman <eberman@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the link error by adding '-static':
gcc -Wall -Wl,-z,max-page-size=0x1000 -pie load_address.c -o /home/yang/linux/tools/testing/selftests/exec/load_address_4096
/usr/bin/ld: /tmp/ccopEGun.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `stderr@@GLIBC_2.17' which may bind externally can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: /tmp/ccopEGun.o(.text+0x158): unresolvable R_AARCH64_ADR_PREL_PG_HI21 relocation against symbol `stderr@@GLIBC_2.17'
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status
make: *** [Makefile:25: tools/testing/selftests/exec/load_address_4096] Error 1
Link: https://lkml.kernel.org/r/20210514092422.2367367-1-yangyingliang@huawei.com
Fixes: 206e22f019 ("tools/testing/selftests: add self-test for verifying load alignment")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: Chris Kennelly <ckennelly@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
do_mq_timedreceive calls wq_sleep with a stack local address. The
sender (do_mq_timedsend) uses this address to later call pipelined_send.
This leads to a very hard to trigger race where a do_mq_timedreceive
call might return and leave do_mq_timedsend to rely on an invalid
address, causing the following crash:
RIP: 0010:wake_q_add_safe+0x13/0x60
Call Trace:
__x64_sys_mq_timedsend+0x2a9/0x490
do_syscall_64+0x80/0x680
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f5928e40343
The race occurs as:
1. do_mq_timedreceive calls wq_sleep with the address of `struct
ext_wait_queue` on function stack (aliased as `ewq_addr` here) - it
holds a valid `struct ext_wait_queue *` as long as the stack has not
been overwritten.
2. `ewq_addr` gets added to info->e_wait_q[RECV].list in wq_add, and
do_mq_timedsend receives it via wq_get_first_waiter(info, RECV) to call
__pipelined_op.
3. Sender calls __pipelined_op::smp_store_release(&this->state,
STATE_READY). Here is where the race window begins. (`this` is
`ewq_addr`.)
4. If the receiver wakes up now in do_mq_timedreceive::wq_sleep, it
will see `state == STATE_READY` and break.
5. do_mq_timedreceive returns, and `ewq_addr` is no longer guaranteed
to be a `struct ext_wait_queue *` since it was on do_mq_timedreceive's
stack. (Although the address may not get overwritten until another
function happens to touch it, which means it can persist around for an
indefinite time.)
6. do_mq_timedsend::__pipelined_op() still believes `ewq_addr` is a
`struct ext_wait_queue *`, and uses it to find a task_struct to pass to
the wake_q_add_safe call. In the lucky case where nothing has
overwritten `ewq_addr` yet, `ewq_addr->task` is the right task_struct.
In the unlucky case, __pipelined_op::wake_q_add_safe gets handed a
bogus address as the receiver's task_struct causing the crash.
do_mq_timedsend::__pipelined_op() should not dereference `this` after
setting STATE_READY, as the receiver counterpart is now free to return.
Change __pipelined_op to call wake_q_add_safe on the receiver's
task_struct returned by get_task_struct, instead of dereferencing `this`
which sits on the receiver's stack.
As Manfred pointed out, the race potentially also exists in
ipc/msg.c::expunge_all and ipc/sem.c::wake_up_sem_queue_prepare. Fix
those in the same way.
Link: https://lkml.kernel.org/r/20210510102950.12551-1-varad.gautam@suse.com
Fixes: c5b2cbdbda ("ipc/mqueue.c: update/document memory barriers")
Fixes: 8116b54e7e ("ipc/sem.c: document and update memory barriers")
Fixes: 0d97a82ba8 ("ipc/msg.c: update and document memory barriers")
Signed-off-by: Varad Gautam <varad.gautam@suse.com>
Reported-by: Matthias von Faber <matthias.vonfaber@aox-tech.de>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
While reviewing [1] I came across commit d3378e86d1 ("mm/gup: check
page posion status for coredump.") and noticed that this patch is broken
in two ways. First it doesn't really prevent hwpoison pages from being
dumped because hwpoison pages can be marked asynchornously at any time
after the check. Secondly, and more importantly, the patch introduces a
ref count leak because get_dump_page takes a reference on the page which
is not released.
It also seems that the patch was merged incorrectly because there were
follow up changes not included as well as discussions on how to address
the underlying problem [2]
Therefore revert the original patch.
Link: http://lkml.kernel.org/r/20210429122519.15183-4-david@redhat.com [1]
Link: http://lkml.kernel.org/r/57ac524c-b49a-99ec-c1e4-ef5027bfb61b@redhat.com [2]
Link: https://lkml.kernel.org/r/20210505135407.31590-1-mhocko@kernel.org
Fixes: d3378e86d1 ("mm/gup: check page posion status for coredump.")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Aili Yao <yaoaili@kingsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
clang sometimes decides not to inline shuffle_zone(), but it calls a
__meminit function. Without the extra __meminit annotation we get this
warning:
WARNING: modpost: vmlinux.o(.text+0x2a86d4): Section mismatch in reference from the function shuffle_zone() to the function .meminit.text:__shuffle_zone()
The function shuffle_zone() references
the function __meminit __shuffle_zone().
This is often because shuffle_zone lacks a __meminit
annotation or the annotation of __shuffle_zone is wrong.
shuffle_free_memory() did not show the same problem in my tests, but it
could happen in theory as well, so mark both as __meminit.
Link: https://lkml.kernel.org/r/20210514135952.2928094-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----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=tipG
-----END PGP SIGNATURE-----
Merge tag 'io_uring-5.13-2021-05-22' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"One fix for a regression with poll in this merge window, and another
just hardens the io-wq exit path a bit"
* tag 'io_uring-5.13-2021-05-22' of git://git.kernel.dk/linux-block:
io_uring: fortify tctx/io_wq cleanup
io_uring: don't modify req->poll for rw
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYKje3wAKCRCAXGG7T9hj
vok/AQCqfe9JKZTlWUA41XMjIid+3qMno0OYUIkNqd8jf/1uxQEAxD+pp7syQPi0
r1byNbD07LuAAmiKfCkCKpRnMBC8pAo=
=OMi7
-----END PGP SIGNATURE-----
Merge tag 'for-linus-5.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- a fix for a boot regression when running as PV guest on hardware
without NX support
- a small series fixing a bug in the Xen pciback driver when
configuring a PCI card with multiple virtual functions
* tag 'for-linus-5.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen-pciback: reconfigure also from backend watch handler
xen-pciback: redo VF placement in the virtual topology
x86/Xen: swap NX determination and GDT setup on BSP
- Fix some math errors in the realtime allocator when extent size hints
are applied.
- Fix unnecessary short writes to realtime files when free space is
fragmented.
- Fix a crash when using scrub tracepoints.
- Restore ioctl uapi definitions that were accidentally removed in
5.13-rc1.
-----BEGIN PGP SIGNATURE-----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=IvUb
-----END PGP SIGNATURE-----
Merge tag 'xfs-5.13-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
- Fix some math errors in the realtime allocator when extent size hints
are applied.
- Fix unnecessary short writes to realtime files when free space is
fragmented.
- Fix a crash when using scrub tracepoints.
- Restore ioctl uapi definitions that were accidentally removed in
5.13-rc1.
* tag 'xfs-5.13-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: restore old ioctl definitions
xfs: fix deadlock retry tracepoint arguments
xfs: retry allocations when locality-based search fails
xfs: adjust rt allocation minlen when extszhint > rtextsize
-----BEGIN PGP SIGNATURE-----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=neWC
-----END PGP SIGNATURE-----
Merge tag '5.13-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Seven smb3 fixes: one for stable, three others fix problems found in
testing handle leases, and a compounded request fix"
* tag '5.13-rc3-smb3' of git://git.samba.org/sfrench/cifs-2.6:
Fix KASAN identified use-after-free issue.
Defer close only when lease is enabled.
Fix kernel oops when CONFIG_DEBUG_ATOMIC_SLEEP is enabled.
cifs: Fix inconsistent indenting
cifs: fix memory leak in smb2_copychunk_range
SMB3: incorrect file id in requests compounded with open
cifs: remove deadstore in cifs_close_all_deferred_files()
- Another batch of removing unneeded type references in schemas
- Fix some out of date filename references
- Convert renesas,drif schema to use DT graph schema
-----BEGIN PGP SIGNATURE-----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=nz3k
-----END PGP SIGNATURE-----
Merge tag 'devicetree-fixes-for-5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree fixes from Rob Herring:
- Another batch of removing unneeded type references in schemas
- Fix some out of date filename references
- Convert renesas,drif schema to use DT graph schema
* tag 'devicetree-fixes-for-5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
dt-bindings: More removals of type references on common properties
dt-bindings: media: renesas,drif: Use graph schema
leds: Fix reference file name of documentation
dt-bindings: phy: cadence-torrent: update reference file of docs
Pull siginfo fix from Eric Biederman:
"During the merge window an issue with si_perf and the siginfo ABI came
up. The alpha and sparc siginfo structure layout had changed with the
addition of SIGTRAP TRAP_PERF and the new field si_perf.
The reason only alpha and sparc were affected is that they are the
only architectures that use si_trapno.
Looking deeper it was discovered that si_trapno is used for only a few
select signals on alpha and sparc, and that none of the other
_sigfault fields past si_addr are used at all. Which means technically
no regression on alpha and sparc.
While the alignment concerns might be dismissed the abuse of si_errno
by SIGTRAP TRAP_PERF does have the potential to cause regressions in
existing userspace.
While we still have time before userspace starts using and depending
on the new definition siginfo for SIGTRAP TRAP_PERF this set of
changes cleans up siginfo_t.
- The si_trapno field is demoted from magic alpha and sparc status
and made an ordinary union member of the _sigfault member of
siginfo_t. Without moving it of course.
- si_perf is replaced with si_perf_data and si_perf_type ending the
abuse of si_errno.
- Unnecessary additions to signalfd_siginfo are removed"
* 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
signalfd: Remove SIL_PERF_EVENT fields from signalfd_siginfo
signal: Deliver all of the siginfo perf data in _perf
signal: Factor force_sig_perf out of perf_sigtrap
signal: Implement SIL_FAULT_TRAPNO
siginfo: Move si_trapno inside the union inside _si_fault
- When CONFIG_MODULE_UNLOAD=n, module exit sections get sorted into the
init region of the module in order to satisfy the requirements of
jump_labels and static_calls. Previously, the exit section check was
done in module_init_section(), but the solution there is not completely
arch-indepedent as ARM is a special case and supplies its own
module_init_section() function. Instead of pushing this logic further to
the arch-specific code, switch to an arch-independent solution to check
for module exit sections in the core module loader code in
layout_sections() instead.
Signed-off-by: Jessica Yu <jeyu@kernel.org>
-----BEGIN PGP SIGNATURE-----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=uBiQ
-----END PGP SIGNATURE-----
Merge tag 'modules-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull module fix from Jessica Yu:
"When CONFIG_MODULE_UNLOAD=n, module exit sections get sorted into the
init region of the module in order to satisfy the requirements of
jump_labels and static_calls.
Previously, the exit section check was done in module_init_section(),
but the solution there is not completely arch-indepedent as ARM is a
special case and supplies its own module_init_section() function.
Instead of pushing this logic further to the arch-specific code,
switch to an arch-independent solution to check for module exit
sections in the core module loader code in layout_sections() instead"
* tag 'modules-for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
module: check for exit sections in layout_sections() instead of module_init_section()
A few fixes that came in around the time of the merge
window.
-----BEGIN PGP SIGNATURE-----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=/vvp
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://github.com/openrisc/linux
Pull OpenRISC fixes from Stafford Horne:
"A few fixes that came in around the time of the merge window"
* tag 'for-linus' of git://github.com/openrisc/linux:
openrisc: Define memory barrier mb
openrisc: mm/init.c: remove unused variable 'end' in paging_init()
openrisc: mm/init.c: remove unused memblock_region variable in map_ram()
openrisc: Fix a memory leak
When multiple PCI devices get assigned to a guest right at boot, libxl
incrementally populates the backend tree. The writes for the first of
the devices trigger the backend watch. In turn xen_pcibk_setup_backend()
will set the XenBus state to Initialised, at which point no further
reconfigures would happen unless a device got hotplugged. Arrange for
reconfigure to also get triggered from the backend watch handler.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/2337cbd6-94b9-4187-9862-c03ea12e0c61@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
The commit referenced below was incomplete: It merely affected what
would get written to the vdev-<N> xenstore node. The guest would still
find the function at the original function number as long as
__xen_pcibk_get_pci_dev() wouldn't be in sync. The same goes for AER wrt
__xen_pcibk_get_pcifront_dev().
Undo overriding the function to zero and instead make sure that VFs at
function zero remain alone in their slot. This has the added benefit of
improving overall capacity, considering that there's only a total of 32
slots available right now (PCI segment and bus can both only ever be
zero at present).
Fixes: 8a5248fe10 ("xen PV passthru: assign SR-IOV virtual functions to separate virtual slots")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/8def783b-404c-3452-196d-3f3fd4d72c9e@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
xen_setup_gdt(), via xen_load_gdt_boot(), wants to adjust page tables.
For this to work when NX is not available, x86_configure_nx() needs to
be called first.
[jgross] Note that this is a revert of 36104cb901 ("x86/xen:
Delay get_cpu_cap until stack canary is established"), which is possible
now that we no longer support running as PV guest in 32-bit mode.
Cc: <stable.vger.kernel.org> # 5.9
Fixes: 36104cb901 ("x86/xen: Delay get_cpu_cap until stack canary is established")
Reported-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/12a866b0-9e89-59f7-ebeb-a2a6cec0987a@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
dma-buf:
- WARN fix
amdgpu:
- Fix downscaling ratio on DCN3.x
- Fix for non-4K pages
- PCO/RV compute hang fix
- Dongle fix
- Aldebaran codec query support
- Refcount leak fix
- Use after free fix
- Navi12 golden settings updates
- GPU reset fixes
radeon:
- Fix for imported BO handling
i915:
- Pin the L-shape quirked object as unshrinkable to fix crashes
- Disable HiZ Raw Stall Optimization on broken gen7 to fix glitches, gfx corruption
- GVT: Move mdev attribute groups into kvmgt module to fix kconfig deps issue
exynos:
- Correct kerneldoc of fimd_shadow_protect_win function.
- Drop redundant error messages.
-----BEGIN PGP SIGNATURE-----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=EJFf
-----END PGP SIGNATURE-----
Merge tag 'drm-fixes-2021-05-21-1' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Usual collection, mostly amdgpu and some i915 regression fixes. I
nearly managed to hose my build/sign machine this week, but I
recovered it just in time, and I even got clang12 built.
dma-buf:
- WARN fix
amdgpu:
- Fix downscaling ratio on DCN3.x
- Fix for non-4K pages
- PCO/RV compute hang fix
- Dongle fix
- Aldebaran codec query support
- Refcount leak fix
- Use after free fix
- Navi12 golden settings updates
- GPU reset fixes
radeon:
- Fix for imported BO handling
i915:
- Pin the L-shape quirked object as unshrinkable to fix crashes
- Disable HiZ Raw Stall Optimization on broken gen7 to fix glitches,
gfx corruption
- GVT: Move mdev attribute groups into kvmgt module to fix kconfig
deps issue
exynos:
- Correct kerneldoc of fimd_shadow_protect_win function
- Drop redundant error messages"
* tag 'drm-fixes-2021-05-21-1' of git://anongit.freedesktop.org/drm/drm:
dma-buf: fix unintended pin/unpin warnings
drm/amdgpu: stop touching sched.ready in the backend
drm/amd/amdgpu: fix a potential deadlock in gpu reset
drm/amdgpu: update sdma golden setting for Navi12
drm/amdgpu: update gc golden setting for Navi12
drm/amdgpu: Fix a use-after-free
drm/amdgpu: add video_codecs query support for aldebaran
drm/amd/amdgpu: fix refcount leak
drm/amd/display: Disconnect non-DP with no EDID
drm/amdgpu: disable 3DCGCG on picasso/raven1 to avoid compute hang
drm/amdgpu: Fix GPU TLB update error when PAGE_SIZE > AMDGPU_PAGE_SIZE
drm/radeon: use the dummy page for GART if needed
drm/amd/display: Use the correct max downscaling value for DCN3.x family
drm/i915/gt: Disable HiZ Raw Stall Optimization on broken gen7
drm/i915/gem: Pin the L-shape quirked object as unshrinkable
drm/exynos/decon5433: Remove redundant error printing in exynos5433_decon_probe()
drm/exynos: Remove redundant error printing in exynos_dsi_probe()
drm/exynos: correct exynos_drm_fimd kerneldoc
drm/i915/gvt: Move mdev attribute groups into kvmgt module
drm/i915 fixes for v5.13-rc3:
- Pin the L-shape quirked object as unshrinkable to fix crashes
- Disable HiZ Raw Stall Optimization on broken gen7 to fix glitches, gfx corruption
- GVT: Move mdev attribute groups into kvmgt module to fix kconfig deps issue
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87a6opehx6.fsf@intel.com
