Here are some small Staging and IIO driver fixes for 4.12-rc6.
Nothing huge, just a few small driver fixes for reported issues. All
have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO fixes from Greg KH:
"Here are some small staging and IIO driver fixes for 4.12-rc6.
Nothing huge, just a few small driver fixes for reported issues. All
have been in linux-next with no reported issues"
* tag 'staging-4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
Staging: rtl8723bs: fix an error code in isFileReadable()
iio: buffer-dmaengine: Add missing header buffer_impl.h
iio: buffer-dma: Add missing header buffer_impl.h
iio: adc: meson-saradc: fix potential crash in meson_sar_adc_clear_fifo
iio: adc: mxs-lradc: Fix return value check in mxs_lradc_adc_probe()
iio: imu: inv_mpu6050: add accel lpf setting for chip >= MPU6500
staging: iio: ad7152: Fix deadlock in ad7152_write_raw_samp_freq()
fixups from Zheng, prompted by the ongoing y2038 work.
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Merge tag 'ceph-for-4.12-rc6' of git://github.com/ceph/ceph-client
Pull ceph fixes from Ilya Dryomov:
"A fix for an old ceph ->fh_to_* bug from Luis and two timestamp fixups
from Zheng, prompted by the ongoing y2038 work"
* tag 'ceph-for-4.12-rc6' of git://github.com/ceph/ceph-client:
ceph: unify inode i_ctime update
ceph: use current_kernel_time() to get request time stamp
ceph: check i_nlink while converting a file handle to dentry
- Fix some bogus ASSERT failures on CONFIG_SMP=n and CONFIG_XFS_DEBUG=y.
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Merge tag 'xfs-4.12-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fix from Darrick Wong:
"One more bugfix for you for 4.12-rc6 to fix something that came up in
an earlier rc:
- Fix some bogus ASSERT failures on CONFIG_SMP=n and CONFIG_XFS_DEBUG=y"
* tag 'xfs-4.12-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix spurious spin_is_locked() assert failures on non-smp kernels
Pull ufs fixes from Al Viro:
"Fix assorted ufs bugs: a couple of deadlocks, fs corruption in
truncate(), oopsen on tail unpacking and truncate when racing with
vmscan, mild fs corruption (free blocks stats summary buggered, *BSD
fsck would complain and fix), several instances of broken logics
around reserved blocks (starting with "check almost never triggers
when it should" and then there are issues with sufficiently large
UFS2)"
[ Note: ufs hasn't gotten any loving in a long time, because nobody
really seems to use it. These ufs fixes are triggered by people
actually caring now, not some sudden influx of new bugs. - Linus ]
* 'ufs-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
ufs_truncate_blocks(): fix the case when size is in the last direct block
ufs: more deadlock prevention on tail unpacking
ufs: avoid grabbing ->truncate_mutex if possible
ufs_get_locked_page(): make sure we have buffer_heads
ufs: fix s_size/s_dsize users
ufs: fix reserved blocks check
ufs: make ufs_freespace() return signed
ufs: fix logics in "ufs: make fsck -f happy"
Pull vfs fixes from Al Viro:
"A couple of fixes; a leak in mntns_install() caught by Andrei (this
cycle regression) + d_invalidate() softlockup fix - that had been
reported by a bunch of people lately, but the problem is pretty old"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs: don't forget to put old mntns in mntns_install
Hang/soft lockup in d_invalidate with simultaneous calls
Merge misc fixes from Andrew Morton:
"5 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm: correct the comment when reclaimed pages exceed the scanned pages
userfaultfd: shmem: handle coredumping in handle_userfault()
mm: numa: avoid waiting on freed migrated pages
swap: cond_resched in swap_cgroup_prepare()
mm/memory-failure.c: use compound_head() flags for huge pages
Commit e1587a4945 ("mm: vmpressure: fix sending wrong events on
underflow") declared that reclaimed pages exceed the scanned pages due
to the thp reclaim.
That is incorrect because THP will be spilt to normal page and loop
again, which will result in the scanned pages increment.
[akpm@linux-foundation.org: tweak comment text]
Link: http://lkml.kernel.org/r/1496824266-25235-1-git-send-email-zhongjiang@huawei.com
Signed-off-by: zhongjiang <zhongjiang@huawei.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Anon and hugetlbfs handle FOLL_DUMP set by get_dump_page() internally to
__get_user_pages().
shmem as opposed has no special FOLL_DUMP handling there so
handle_mm_fault() is invoked without mmap_sem and ends up calling
handle_userfault() that isn't expecting to be invoked without mmap_sem
held.
This makes handle_userfault() fail immediately if invoked through
shmem_vm_ops->fault during coredumping and solves the problem.
The side effect is a BUG_ON with no lock held triggered by the
coredumping process which exits. Only 4.11 is affected, pre-4.11 anon
memory holes are skipped in __get_user_pages by checking FOLL_DUMP
explicitly against empty pagetables (mm/gup.c:no_page_table()).
It's zero cost as we already had a check for current->flags to prevent
futex to trigger userfaults during exit (PF_EXITING).
Link: http://lkml.kernel.org/r/20170615214838.27429-1-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: <stable@vger.kernel.org> [4.11+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In do_huge_pmd_numa_page(), we attempt to handle a migrating thp pmd by
waiting until the pmd is unlocked before we return and retry. However,
we can race with migrate_misplaced_transhuge_page():
// do_huge_pmd_numa_page // migrate_misplaced_transhuge_page()
// Holds 0 refs on page // Holds 2 refs on page
vmf->ptl = pmd_lock(vma->vm_mm, vmf->pmd);
/* ... */
if (pmd_trans_migrating(*vmf->pmd)) {
page = pmd_page(*vmf->pmd);
spin_unlock(vmf->ptl);
ptl = pmd_lock(mm, pmd);
if (page_count(page) != 2)) {
/* roll back */
}
/* ... */
mlock_migrate_page(new_page, page);
/* ... */
spin_unlock(ptl);
put_page(page);
put_page(page); // page freed here
wait_on_page_locked(page);
goto out;
}
This can result in the freed page having its waiters flag set
unexpectedly, which trips the PAGE_FLAGS_CHECK_AT_PREP checks in the
page alloc/free functions. This has been observed on arm64 KVM guests.
We can avoid this by having do_huge_pmd_numa_page() take a reference on
the page before dropping the pmd lock, mirroring what we do in
__migration_entry_wait().
When we hit the race, migrate_misplaced_transhuge_page() will see the
reference and abort the migration, as it may do today in other cases.
Fixes: b8916634b7 ("mm: Prevent parallel splits during THP migration")
Link: http://lkml.kernel.org/r/1497349722-6731-2-git-send-email-will.deacon@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Steve Capper <steve.capper@arm.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
I saw need_resched() warnings when swapping on large swapfile (TBs)
because continuously allocating many pages in swap_cgroup_prepare() took
too long.
We already cond_resched when freeing page in swap_cgroup_swapoff(). Do
the same for the page allocation.
Link: http://lkml.kernel.org/r/20170604200109.17606-1-yuzhao@google.com
Signed-off-by: Yu Zhao <yuzhao@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
memory_failure() chooses a recovery action function based on the page
flags. For huge pages it uses the tail page flags which don't have
anything interesting set, resulting in:
> Memory failure: 0x9be3b4: Unknown page state
> Memory failure: 0x9be3b4: recovery action for unknown page: Failed
Instead, save a copy of the head page's flags if this is a huge page,
this means if there are no relevant flags for this tail page, we use the
head pages flags instead. This results in the me_huge_page() recovery
action being called:
> Memory failure: 0x9b7969: recovery action for huge page: Delayed
For hugepages that have not yet been allocated, this allows the hugepage
to be dequeued.
Fixes: 524fca1e73 ("HWPOISON: fix misjudgement of page_action() for errors on mlocked pages")
Link: http://lkml.kernel.org/r/20170524130204.21845-1-james.morse@arm.com
Signed-off-by: James Morse <james.morse@arm.com>
Tested-by: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Three small fixes for recently merged code:
- remove a spurious WARN_ON when a PCI device has no of_node, it's allowed in
some circumstances for there to be no of_node.
- fix the offset for store EOI MMIOs in the XIVE interrupt controller.
- fix non-const WARN_ONs which were becoming BUGs due to them losing
BUGFLAG_WARNING in a recent cleanup patch.
Thanks to:
Alexey Kardashevskiy, Alistair Popple, Benjamin Herrenschmidt.
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Merge tag 'powerpc-4.12-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Three small fixes for recently merged code:
- remove a spurious WARN_ON when a PCI device has no of_node, it's
allowed in some circumstances for there to be no of_node.
- fix the offset for store EOI MMIOs in the XIVE interrupt
controller.
- fix non-const WARN_ONs which were becoming BUGs due to them losing
BUGFLAG_WARNING in a recent cleanup patch.
Thanks to: Alexey Kardashevskiy, Alistair Popple, Benjamin
Herrenschmidt"
* tag 'powerpc-4.12-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/debug: Add missing warn flag to WARN_ON's non-builtin path
powerpc/xive: Fix offset for store EOI MMIOs
powerpc/npu-dma: Remove spurious WARN_ON when a PCI device has no of_node
- Fix probing of precise_ip level for default cycles event, that
got broken recently on x86_64 when its arch code started
considering invalid requesting precise samples when not sampling
(i.e. when attr.sample_period == 0).
This also fixes another problem in s/390 where the precision
probing with sample_period == 0 returned precise_ip > 0, that
then, when setting up the real cycles event (not probing) would
return EOPNOTSUPP for precise_ip > 0 (as determined previously
by probing) and sample_period > 0.
These problems resulted in attr_precise not being set to the
highest precision available on x86.64 when no event was specified,
i.e. the canonical:
perf record ./workload
would end up using attr.precise_ip = 0. As a workaround this would
need to be done:
perf record -e cycles:P ./workload
And on s/390 it would plain not work, requiring using:
perf record -e cycles ./workload
as a workaround. (Arnaldo Carvalho de Melo)
- Fix perf build with ARCH=x86_64, when ARCH should be transformed
into ARCH=x86, just like with the main kernel Makefile and
tools/objtool's, i.e. use SRCARCH. (Jiada Wang)
- Avoid accessing uninitialized data structures when unwinding with
elfutils's libdw, making it more closely mimic libunwind's unwinder.
(Milian Wolff)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo-4.12-20170616' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
- Fix probing of precise_ip level for default cycles event, that
got broken recently on x86_64 when its arch code started
considering invalid requesting precise samples when not sampling
(i.e. when attr.sample_period == 0).
This also fixes another problem in s/390 where the precision
probing with sample_period == 0 returned precise_ip > 0, that
then, when setting up the real cycles event (not probing) would
return EOPNOTSUPP for precise_ip > 0 (as determined previously
by probing) and sample_period > 0.
These problems resulted in attr_precise not being set to the
highest precision available on x86.64 when no event was specified,
i.e. the canonical:
perf record ./workload
would end up using attr.precise_ip = 0. As a workaround this would
need to be done:
perf record -e cycles:P ./workload
And on s/390 it would plain not work, requiring using:
perf record -e cycles ./workload
as a workaround. (Arnaldo Carvalho de Melo)
- Fix perf build with ARCH=x86_64, when ARCH should be transformed
into ARCH=x86, just like with the main kernel Makefile and
tools/objtool's, i.e. use SRCARCH. (Jiada Wang)
- Avoid accessing uninitialized data structures when unwinding with
elfutils's libdw, making it more closely mimic libunwind's unwinder.
(Milian Wolff)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
And while I'm sending you this I'm also sneaking in a trivial new helper
from Bart so that we don't need inter-tree dependencies for the next merge
window.
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Merge tag 'configfs-for-4.12' of git://git.infradead.org/users/hch/configfs
Pull configfs updates from Christoph Hellwig:
"A fix from Nic for a race seen in production (including a stable tag).
And while I'm sending you this I'm also sneaking in a trivial new
helper from Bart so that we don't need inter-tree dependencies for the
next merge window"
* tag 'configfs-for-4.12' of git://git.infradead.org/users/hch/configfs:
configfs: Introduce config_item_get_unless_zero()
configfs: Fix race between create_link and configfs_rmdir
CONFIG_FORTIFY_SOURCE=y implements fortify_panic() as a __noreturn function,
so objtool needs to know about it too.
Suggested-by: Daniel Micay <danielmicay@gmail.com>
Tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1497532835-32704-1-git-send-email-jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
- meson-gx: work around broken SDIO with certain WiFi chips
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Merge tag 'mmc-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fix from Ulf Hansson:
"MMC meson-gx host: work around broken SDIO with certain WiFi chips"
* tag 'mmc-v4.12-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: meson-gx: work around broken SDIO with certain WiFi chips
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Merge tag 'drm-fixes-for-v4.12-rc6' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"This is the main fixes pull for 4.12-rc6, all pretty normal for this
stage, nothing really stands out. The mxsfb one is probably the
largest and it's for a black screen boot problem.
AMD, i915, mgag200, msxfb, tegra fixes"
* tag 'drm-fixes-for-v4.12-rc6' of git://people.freedesktop.org/~airlied/linux:
drm: mxsfb_crtc: Reset the eLCDIF controller
drm/mgag200: Fix to always set HiPri for G200e4 V2
drm/tegra: Correct idr_alloc() minimum id
drm/tegra: Fix lockup on a use of staging API
gpu: host1x: Fix error handling
drm/radeon: Fix overflow of watermark calcs at > 4k resolutions.
drm/amdgpu: Fix overflow of watermark calcs at > 4k resolutions.
drm/radeon: fix "force the UVD DPB into VRAM as well"
drm/i915: Fix GVT-g PVINFO version compatibility check
drm/i915: Fix SKL+ watermarks for 90/270 rotation
drm/i915: Fix scaling check for 90/270 degree plane rotation
drm: dw-hdmi: Fix compilation breakage by selecting REGMAP_MMIO
- A fix for fix eea40b8f62 ("infiniband: call ipv6 route lookup via the
stub interface")
- 6 patches against bnxt_re...the first two are considerably larger than
I would like, but as they address real issues I went ahead and
submitted them (it also helped that a good deal of the churn was
removing code repeated in multiple places and consolidating it to one
common function)
- 2 fixes against qedr that just came in
- 1 fix against rxe that took a few revisions to get right plus time to
get the proper reviews
- 5 late breaking IPoIB fixes
- 1 late cxgb4 fix
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fixes from Doug Ledford:
"I had thought at the time of the last pull request that there wouldn't
be much more to go, but several things just kept trickling in over the
last week.
Instead of just the six patches to bnxt_re that I had anticipated,
there are another five IPoIB patches, two qedr patches, and a few
other miscellaneous patches.
The bnxt_re patches are more lines of diff than I like to submit this
late in the game. That's mostly because of the first two patches in
the series of six. I almost dropped them just because of the lines of
churn, but on a close review, a lot of the churn came from removing
duplicated code sections and consolidating them into callable
routines. I felt like this made the number of lines of change more
acceptable, and they address problems, so I left them. The remainder
of the patches are all small, well contained, and well understood.
These have passed 0day testing, but have not been submitted to
linux-next (but a local merge test with your current master was
without any conflicts).
Summary:
- A fix for fix eea40b8f62 ("infiniband: call ipv6 route lookup via
the stub interface")
- Six patches against bnxt_re...the first two are considerably larger
than I would like, but as they address real issues I went ahead and
submitted them (it also helped that a good deal of the churn was
removing code repeated in multiple places and consolidating it to
one common function)
- Two fixes against qedr that just came in
- One fix against rxe that took a few revisions to get right plus
time to get the proper reviews
- Five late breaking IPoIB fixes
- One late cxgb4 fix"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
rdma/cxgb4: Fix memory leaks during module exit
IB/ipoib: Fix memory leak in create child syscall
IB/ipoib: Fix access to un-initialized napi struct
IB/ipoib: Delete napi in device uninit default
IB/ipoib: Limit call to free rdma_netdev for capable devices
IB/ipoib: Fix memory leaks for child interfaces priv
rxe: Fix a sleep-in-atomic bug in post_one_send
RDMA/qedr: Add 64KB PAGE_SIZE support to user-space queues
RDMA/qedr: Initialize byte_len in WC of READ and SEND commands
RDMA/bnxt_re: Remove FMR support
RDMA/bnxt_re: Fix RQE posting logic
RDMA/bnxt_re: Add HW workaround for avoiding stall for UD QPs
RDMA/bnxt_re: Dereg MR in FW before freeing the fast_reg_page_list
RDMA/bnxt_re: HW workarounds for handling specific conditions
RDMA/bnxt_re: Fixing the Control path command and response handling
IB/addr: Fix setting source address in addr6_resolve()
intel_telemetry_debugfs:
- fix oops when load/unload module
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Merge tag 'platform-drivers-x86-v4.12-2' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver fix from Darren Hart:
"Just a single patch to fix an oops in the intel_telemetry_debugfs
module load/unload"
* tag 'platform-drivers-x86-v4.12-2' of git://git.infradead.org/linux-platform-drivers-x86:
platform/x86: intel_telemetry_debugfs: fix oops when load/unload module
Pull block layer fix from Jens Axboe:
"Just a single fix this week, fixing a regression introduced in this
release.
When we put the final reference to the queue, we may need to block.
Ensure that we can safely do so. From Bart"
* 'for-linus' of git://git.kernel.dk/linux-block:
block: Fix a blk_exit_rl() regression
Pull dmi fixes from Jean Delvare.
* 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
firmware: dmi_scan: Check DMI structure length
firmware: dmi: Fix permissions of product_family
firmware: dmi_scan: Make dmi_walk and dmi_walk_early return real error codes
firmware: dmi_scan: Look for SMBIOS 3 entry point first
Pull selinux fix from James Morris:
"Fix for a double free bug in SELinux"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
selinux: fix double free in selinux_parse_opts_str()
When trapped on WARN_ON(), report_bug() is expected to return
BUG_TRAP_TYPE_WARN so the caller will increment NIP by 4 and continue.
The __builtin_constant_p() path of the PPC's WARN_ON()
calls (indirectly) __WARN_FLAGS() which has BUGFLAG_WARNING set,
however the other branch does not which makes report_bug() report a
bug rather than a warning.
Fixes: f26dee1510 ("debug: Avoid setting BUGFLAG_WARNING twice")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Driver Changes:
- dw-hdmi: Fix compilation error if REGMAP_MMIO not selected (Laurent)
- host1x: Fix incorrect return value (Christophe)
- tegra: Shore up idr API usage in tegra staging code (Dmitry)
- mgag200: Always use HiPri mode for G200e4v2 and limit max bandwidth (Mathieu)
- mxsfb: Ensure display can be lit up without bootloader initialization (Fabio)
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Dmitry Osipenko <digetx@gmail.com>
Cc: Mathieu Larouche <mathieu.larouche@matrox.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
* tag 'drm-misc-fixes-2017-06-15' of git://anongit.freedesktop.org/git/drm-misc:
drm: mxsfb_crtc: Reset the eLCDIF controller
drm/mgag200: Fix to always set HiPri for G200e4 V2
drm/tegra: Correct idr_alloc() minimum id
drm/tegra: Fix lockup on a use of staging API
gpu: host1x: Fix error handling
drm: dw-hdmi: Fix compilation breakage by selecting REGMAP_MMIO
A few fixes for 4.12:
- fix a UVD regression on SI
- fix overflow in watermark calcs on large modes
* 'drm-fixes-4.12' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon: Fix overflow of watermark calcs at > 4k resolutions.
drm/amdgpu: Fix overflow of watermark calcs at > 4k resolutions.
drm/radeon: fix "force the UVD DPB into VRAM as well"
Using the syzkaller kernel fuzzer, Andrey Konovalov generated the
following error in gadgetfs:
> BUG: KASAN: use-after-free in __lock_acquire+0x3069/0x3690
> kernel/locking/lockdep.c:3246
> Read of size 8 at addr ffff88003a2bdaf8 by task kworker/3:1/903
>
> CPU: 3 PID: 903 Comm: kworker/3:1 Not tainted 4.12.0-rc4+ #35
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
> Workqueue: usb_hub_wq hub_event
> Call Trace:
> __dump_stack lib/dump_stack.c:16 [inline]
> dump_stack+0x292/0x395 lib/dump_stack.c:52
> print_address_description+0x78/0x280 mm/kasan/report.c:252
> kasan_report_error mm/kasan/report.c:351 [inline]
> kasan_report+0x230/0x340 mm/kasan/report.c:408
> __asan_report_load8_noabort+0x19/0x20 mm/kasan/report.c:429
> __lock_acquire+0x3069/0x3690 kernel/locking/lockdep.c:3246
> lock_acquire+0x22d/0x560 kernel/locking/lockdep.c:3855
> __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
> _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151
> spin_lock include/linux/spinlock.h:299 [inline]
> gadgetfs_suspend+0x89/0x130 drivers/usb/gadget/legacy/inode.c:1682
> set_link_state+0x88e/0xae0 drivers/usb/gadget/udc/dummy_hcd.c:455
> dummy_hub_control+0xd7e/0x1fb0 drivers/usb/gadget/udc/dummy_hcd.c:2074
> rh_call_control drivers/usb/core/hcd.c:689 [inline]
> rh_urb_enqueue drivers/usb/core/hcd.c:846 [inline]
> usb_hcd_submit_urb+0x92f/0x20b0 drivers/usb/core/hcd.c:1650
> usb_submit_urb+0x8b2/0x12c0 drivers/usb/core/urb.c:542
> usb_start_wait_urb+0x148/0x5b0 drivers/usb/core/message.c:56
> usb_internal_control_msg drivers/usb/core/message.c:100 [inline]
> usb_control_msg+0x341/0x4d0 drivers/usb/core/message.c:151
> usb_clear_port_feature+0x74/0xa0 drivers/usb/core/hub.c:412
> hub_port_disable+0x123/0x510 drivers/usb/core/hub.c:4177
> hub_port_init+0x1ed/0x2940 drivers/usb/core/hub.c:4648
> hub_port_connect drivers/usb/core/hub.c:4826 [inline]
> hub_port_connect_change drivers/usb/core/hub.c:4999 [inline]
> port_event drivers/usb/core/hub.c:5105 [inline]
> hub_event+0x1ae1/0x3d40 drivers/usb/core/hub.c:5185
> process_one_work+0xc08/0x1bd0 kernel/workqueue.c:2097
> process_scheduled_works kernel/workqueue.c:2157 [inline]
> worker_thread+0xb2b/0x1860 kernel/workqueue.c:2233
> kthread+0x363/0x440 kernel/kthread.c:231
> ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:424
>
> Allocated by task 9958:
> save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
> save_stack+0x43/0xd0 mm/kasan/kasan.c:513
> set_track mm/kasan/kasan.c:525 [inline]
> kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:617
> kmem_cache_alloc_trace+0x87/0x280 mm/slub.c:2745
> kmalloc include/linux/slab.h:492 [inline]
> kzalloc include/linux/slab.h:665 [inline]
> dev_new drivers/usb/gadget/legacy/inode.c:170 [inline]
> gadgetfs_fill_super+0x24f/0x540 drivers/usb/gadget/legacy/inode.c:1993
> mount_single+0xf6/0x160 fs/super.c:1192
> gadgetfs_mount+0x31/0x40 drivers/usb/gadget/legacy/inode.c:2019
> mount_fs+0x9c/0x2d0 fs/super.c:1223
> vfs_kern_mount.part.25+0xcb/0x490 fs/namespace.c:976
> vfs_kern_mount fs/namespace.c:2509 [inline]
> do_new_mount fs/namespace.c:2512 [inline]
> do_mount+0x41b/0x2d90 fs/namespace.c:2834
> SYSC_mount fs/namespace.c:3050 [inline]
> SyS_mount+0xb0/0x120 fs/namespace.c:3027
> entry_SYSCALL_64_fastpath+0x1f/0xbe
>
> Freed by task 9960:
> save_stack_trace+0x1b/0x20 arch/x86/kernel/stacktrace.c:59
> save_stack+0x43/0xd0 mm/kasan/kasan.c:513
> set_track mm/kasan/kasan.c:525 [inline]
> kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:590
> slab_free_hook mm/slub.c:1357 [inline]
> slab_free_freelist_hook mm/slub.c:1379 [inline]
> slab_free mm/slub.c:2961 [inline]
> kfree+0xed/0x2b0 mm/slub.c:3882
> put_dev+0x124/0x160 drivers/usb/gadget/legacy/inode.c:163
> gadgetfs_kill_sb+0x33/0x60 drivers/usb/gadget/legacy/inode.c:2027
> deactivate_locked_super+0x8d/0xd0 fs/super.c:309
> deactivate_super+0x21e/0x310 fs/super.c:340
> cleanup_mnt+0xb7/0x150 fs/namespace.c:1112
> __cleanup_mnt+0x1b/0x20 fs/namespace.c:1119
> task_work_run+0x1a0/0x280 kernel/task_work.c:116
> exit_task_work include/linux/task_work.h:21 [inline]
> do_exit+0x18a8/0x2820 kernel/exit.c:878
> do_group_exit+0x14e/0x420 kernel/exit.c:982
> get_signal+0x784/0x1780 kernel/signal.c:2318
> do_signal+0xd7/0x2130 arch/x86/kernel/signal.c:808
> exit_to_usermode_loop+0x1ac/0x240 arch/x86/entry/common.c:157
> prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
> syscall_return_slowpath+0x3ba/0x410 arch/x86/entry/common.c:263
> entry_SYSCALL_64_fastpath+0xbc/0xbe
>
> The buggy address belongs to the object at ffff88003a2bdae0
> which belongs to the cache kmalloc-1024 of size 1024
> The buggy address is located 24 bytes inside of
> 1024-byte region [ffff88003a2bdae0, ffff88003a2bdee0)
> The buggy address belongs to the page:
> page:ffffea0000e8ae00 count:1 mapcount:0 mapping: (null)
> index:0x0 compound_mapcount: 0
> flags: 0x100000000008100(slab|head)
> raw: 0100000000008100 0000000000000000 0000000000000000 0000000100170017
> raw: ffffea0000ed3020 ffffea0000f5f820 ffff88003e80efc0 0000000000000000
> page dumped because: kasan: bad access detected
>
> Memory state around the buggy address:
> ffff88003a2bd980: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> ffff88003a2bda00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
> >ffff88003a2bda80: fc fc fc fc fc fc fc fc fc fc fc fc fb fb fb fb
> ^
> ffff88003a2bdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
> ffff88003a2bdb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
> ==================================================================
What this means is that the gadgetfs_suspend() routine was trying to
access dev->lock after it had been deallocated. The root cause is a
race in the dummy_hcd driver; the dummy_udc_stop() routine can race
with the rest of the driver because it contains no locking. And even
when proper locking is added, it can still race with the
set_link_state() function because that function incorrectly drops the
private spinlock before invoking any gadget driver callbacks.
The result of this race, as seen above, is that set_link_state() can
invoke a callback in gadgetfs even after gadgetfs has been unbound
from dummy_hcd's UDC and its private data structures have been
deallocated.
include/linux/usb/gadget.h documents that the ->reset, ->disconnect,
->suspend, and ->resume callbacks may be invoked in interrupt context.
In general this is necessary, to prevent races with gadget driver
removal. This patch fixes dummy_hcd to retain the spinlock across
these calls, and it adds a spinlock acquisition to dummy_udc_stop() to
prevent the race.
The net2280 driver makes the same mistake of dropping the private
spinlock for its ->disconnect and ->reset callback invocations. The
patch fixes it too.
Lastly, since gadgetfs_suspend() may be invoked in interrupt context,
it cannot assume that interrupts are enabled when it runs. It must
use spin_lock_irqsave() instead of spin_lock_irq(). The patch fixes
that bug as well.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Andrey Konovalov <andreyknvl@google.com>
CC: <stable@vger.kernel.org>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
According to the eLCDIF initialization steps listed in the MX6SX
Reference Manual the eLCDIF block reset is mandatory.
Without performing the eLCDIF reset the display shows garbage content
when the kernel boots.
In earlier tests this issue has not been observed because the bootloader
was previously showing a splash screen and the bootloader display driver
does properly implement the eLCDIF reset.
Add the eLCDIF reset to the driver, so that it can operate correctly
independently of the bootloader.
Tested on a imx6sx-sdb board.
Cc: <stable@vger.kernel.org>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1494007301-14535-1-git-send-email-fabio.estevam@nxp.com
Because we need to transfer some bytes with PIO, the msg length is not
the length of the DMA buffer. Use the correct value which we used when
doing the mapping.
Fixes: 73e8b05283 ("i2c: rcar: add DMA support")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Architecturally we should apply a 0x400 offset for these. Not doing
it will break future HW implementations.
The offset of 0 is supposed to remain for "triggers" though not all
sources support both trigger and store EOI, and in P9 specifically,
some sources will treat 0 as a store EOI. But future chips will not.
So this makes us use the properly architected offset which should work
always.
Fixes: 243e25112d ("powerpc/xive: Native exploitation of the XIVE interrupt controller")
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The client ID 0 is reserved by the host1x/cdma to mark the timeout timer
work as already been scheduled and context ID is used as the clients one.
This fixes spurious CDMA timeouts.
Fixes: bdd2f9cd10 ("drm/tegra: Don't leak kernel pointer to userspace")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/9c19a44219acd988e678cf9abe21363911184625.1497480754.git.digetx@gmail.com
If 'devm_reset_control_get' returns an error, then we erroneously return
success because error code is taken from 'host->clk' instead of
'host->rst'.
Fixes: b386c6b73a ("gpu: host1x: Support module reset")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170410202922.17665-1-christophe.jaillet@wanadoo.fr
Before accessing DMI data to record it for later, we should ensure
that the DMI structures are large enough to contain the data in
question.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
This is not sensitive information like serial numbers, we can allow
all users to read it.
Fix odd alignment while we're here.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Fixes: c61872c983 ("firmware: dmi: Add DMI_PRODUCT_FAMILY identification string")
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Currently they return -1 on error, which will confuse callers if
they try to interpret it as a normal negative error code.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Since version 3.0.0 of the SMBIOS specification, there can be
multiple entry points in memory, pointing to one or two DMI tables.
If both a 32-bit ("_SM_") entry point and a 64-bit ("_SM3_") entry
point are present, the specification requires that the latter points
to a table which is a super-set of the table pointed to by the
former. Therefore we should give preference to the 64-bit ("_SM3_")
entry point.
However, currently the code is picking the first valid entry point
it finds. Per specification, we should look for a 64-bit ("_SM3_")
entry point first, and if we can't find any, look for a 32-bit
("_SM_" or "_DMI_") entry point. Modify the code to do that.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Fixes: 4f757f3cbf ("make sure that mntns_install() doesn't end up with referral for root")
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
It's not hard to trigger a bunch of d_invalidate() on the same
dentry in parallel. They end up fighting each other - any
dentry picked for removal by one will be skipped by the rest
and we'll go for the next iteration through the entire
subtree, even if everything is being skipped. Morevoer, we
immediately go back to scanning the subtree. The only thing
we really need is to dissolve all mounts in the subtree and
as soon as we've nothing left to do, we can just unhash the
dentry and bugger off.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The .its targets require information about the kernel binary, such as
its entry point, which is extracted from the vmlinux ELF. We therefore
require that the ELF is built before the .its files are generated.
Declare this requirement in the Makefile such that make will ensure this
is always the case, otherwise in corner cases we can hit issues as the
.its is generated with an incorrect (either invalid or stale) entry
point.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: cf2a5e0bb4 ("MIPS: Support generating Flattened Image Trees (.itb)")
Cc: linux-mips@linux-mips.org
Cc: stable <stable@vger.kernel.org> # v4.9+
Patchwork: https://patchwork.linux-mips.org/patch/16179/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The code handling the pop76 opcode (ie. bnezc & jialc instructions) in
__compute_return_epc_for_insn() needs to set the value of $31 in the
jialc case, which is encoded with rs = 0. However its check to
differentiate bnezc (rs != 0) from jialc (rs = 0) was unfortunately
backwards, meaning that if we emulate a bnezc instruction we clobber $31
& if we emulate a jialc instruction it actually behaves like a jic
instruction.
Fix this by inverting the check of rs to match the way the instructions
are actually encoded.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: 28d6f93d20 ("MIPS: Emulate the new MIPS R6 BNEZC and JIALC instructions")
Cc: stable <stable@vger.kernel.org> # v4.0+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16178/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Pull networking fixes from David Miller:
1) The netlink attribute passed in to dev_set_alias() is not
necessarily NULL terminated, don't use strlcpy() on it. From
Alexander Potapenko.
2) Fix implementation of atomics in arm64 bpf JIT, from Daniel
Borkmann.
3) Correct the release of netdevs and driver private data in certain
circumstances.
4) Sanitize netlink message length properly in decnet, from Mateusz
Jurczyk.
5) Don't leak kernel data in rtnl_fill_vfinfo() netlink blobs. From
Yuval Mintz.
6) Hash secret is never initialized in ipv6 ILA translation code, from
Arnd Bergmann. I guess those clang warnings about unused inline
functions are useful for something!
7) Fix endian selection in bpf_endian.h, from Daniel Borkmann.
8) Sanitize sockaddr length before dereferncing any fields in AF_UNIX
and CAIF. From Mateusz Jurczyk.
9) Fix timestamping for GMAC3 chips in stmmac driver, from Mario
Molitor.
10) Do not leak netdev on dev_alloc_name() errors in mac80211, from
Johannes Berg.
11) Fix locking in sctp_for_each_endpoint(), from Xin Long.
12) Fix wrong memset size on 32-bit in snmp6, from Christian Perle.
13) Fix use after free in ip_mc_clear_src(), from WANG Cong.
14) Fix regressions caused by ICMP rate limiting changes in 4.11, from
Jesper Dangaard Brouer.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (91 commits)
i40e: Fix a sleep-in-atomic bug
net: don't global ICMP rate limit packets originating from loopback
net/act_pedit: fix an error code
net: update undefined ->ndo_change_mtu() comment
net_sched: move tcf_lock down after gen_replace_estimator()
caif: Add sockaddr length check before accessing sa_family in connect handler
qed: fix dump of context data
qmi_wwan: new Telewell and Sierra device IDs
net: phy: Fix MDIO_THUNDER dependencies
netconsole: Remove duplicate "netconsole: " logging prefix
igmp: acquire pmc lock for ip_mc_clear_src()
r8152: give the device version
net: rps: fix uninitialized symbol warning
mac80211: don't send SMPS action frame in AP mode when not needed
mac80211/wpa: use constant time memory comparison for MACs
mac80211: set bss_info data before configuring the channel
mac80211: remove 5/10 MHz rate code from station MLME
mac80211: Fix incorrect condition when checking rx timestamp
mac80211: don't look at the PM bit of BAR frames
i40e: fix handling of HW ATR eviction
...
Pull crypto fix from Herbert Xu:
"This fixes a bug on sparc where we may dereference freed stack memory"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: Work around deallocated stack frame reference gcc bug on sparc.
- Revert a 4.11 ACPICA change that made assumptions which are not
satisfied on some systems and caused the enumeration of resources
to fail on them (Rafael Wysocki).
- Add a mechanism to prevent tables from being unmapped prematurely
due to reference counter overflows (Lv Zheng).
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Merge tag 'acpi-4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These revert an ACPICA commit from the 4.11 cycle that causes problems
to happen on some systems and add a protection against possible kernel
crashes due to table reference counter imbalance.
Specifics:
- Revert a 4.11 ACPICA change that made assumptions which are not
satisfied on some systems and caused the enumeration of resources
to fail on them (Rafael Wysocki).
- Add a mechanism to prevent tables from being unmapped prematurely
due to reference counter overflows (Lv Zheng)"
* tag 'acpi-4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPICA: Tables: Mechanism to handle late stage acpi_get_table() imbalance
Revert "ACPICA: Disassembler: Enhance resource descriptor detection"
Linus Torvalds