Stack guard page is a useful feature to reduce a risk of stack smashing
into a different mapping. We have been using a single page gap which
is sufficient to prevent having stack adjacent to a different mapping.
But this seems to be insufficient in the light of the stack usage in
userspace. E.g. glibc uses as large as 64kB alloca() in many commonly
used functions. Others use constructs liks gid_t buffer[NGROUPS_MAX]
which is 256kB or stack strings with MAX_ARG_STRLEN.
This will become especially dangerous for suid binaries and the default
no limit for the stack size limit because those applications can be
tricked to consume a large portion of the stack and a single glibc call
could jump over the guard page. These attacks are not theoretical,
unfortunatelly.
Make those attacks less probable by increasing the stack guard gap
to 1MB (on systems with 4k pages; but make it depend on the page size
because systems with larger base pages might cap stack allocations in
the PAGE_SIZE units) which should cover larger alloca() and VLA stack
allocations. It is obviously not a full fix because the problem is
somehow inherent, but it should reduce attack space a lot.
One could argue that the gap size should be configurable from userspace,
but that can be done later when somebody finds that the new 1MB is wrong
for some special case applications. For now, add a kernel command line
option (stack_guard_gap) to specify the stack gap size (in page units).
Implementation wise, first delete all the old code for stack guard page:
because although we could get away with accounting one extra page in a
stack vma, accounting a larger gap can break userspace - case in point,
a program run with "ulimit -S -v 20000" failed when the 1MB gap was
counted for RLIMIT_AS; similar problems could come with RLIMIT_MLOCK
and strict non-overcommit mode.
Instead of keeping gap inside the stack vma, maintain the stack guard
gap as a gap between vmas: using vm_start_gap() in place of vm_start
(or vm_end_gap() in place of vm_end if VM_GROWSUP) in just those few
places which need to respect the gap - mainly arch_get_unmapped_area(),
and and the vma tree's subtree_gap support for that.
Original-patch-by: Oleg Nesterov <oleg@redhat.com>
Original-patch-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Tested-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Stream of fixes has slowed down, only a few this week:
- Some DT fixes for Allwinner platforms, and addition of a clock to
the R_CCU clock controller that had been missed.
- A couple of small DT fixes for am335x-sl50.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=pi+d
-----END PGP SIGNATURE-----
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Stream of fixes has slowed down, only a few this week:
- Some DT fixes for Allwinner platforms, and addition of a clock to
the R_CCU clock controller that had been missed.
- A couple of small DT fixes for am335x-sl50"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: allwinner: a64: Add PLL_PERIPH0 clock to the R_CCU
ARM: sunxi: h3-h5: Add PLL_PERIPH0 clock to the R_CCU
ARM: dts: am335x-sl50: Fix cannot claim requested pins for spi0
ARM: dts: am335x-sl50: Fix card detect pin for mmc1
arm64: allwinner: h5: Remove syslink to shared DTSI
ARM: sunxi: h3/h5: fix the compatible of R_CCU
A few fixes around the PRCM support that got in 4.12 with a wrong
compatible, and a missing clock in the binding.
-----BEGIN PGP SIGNATURE-----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=WD1J
-----END PGP SIGNATURE-----
Merge tag 'sunxi-fixes-for-4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into fixes
Allwinner fixes for 4.12
A few fixes around the PRCM support that got in 4.12 with a wrong
compatible, and a missing clock in the binding.
* tag 'sunxi-fixes-for-4.12' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
arm64: allwinner: a64: Add PLL_PERIPH0 clock to the R_CCU
ARM: sunxi: h3-h5: Add PLL_PERIPH0 clock to the R_CCU
arm64: allwinner: h5: Remove syslink to shared DTSI
ARM: sunxi: h3/h5: fix the compatible of R_CCU
Signed-off-by: Olof Johansson <olof@lixom.net>
for claiming SPI pins, and to fix a SDIO card detect
pin for production version of the device.
-----BEGIN PGP SIGNATURE-----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=e4F/
-----END PGP SIGNATURE-----
Merge tag 'omap-for-v4.12/fixes-sl50' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
Two fixes for am335x-sl50 to fix a boot time error
for claiming SPI pins, and to fix a SDIO card detect
pin for production version of the device.
* tag 'omap-for-v4.12/fixes-sl50' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: am335x-sl50: Fix cannot claim requested pins for spi0
ARM: dts: am335x-sl50: Fix card detect pin for mmc1
Signed-off-by: Olof Johansson <olof@lixom.net>
It turns out balloon does not handle IOMMUs correctly.
We should fix that at some point, for now let's just
disable this configuration.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-----BEGIN PGP SIGNATURE-----
iQEcBAABAgAGBQJZRt8uAAoJECgfDbjSjVRph00H/2YkmqY3o5J769R1x/v4Q1Jl
7ZI++QjLnMSJYfw/oVSSQ7YvmG0MNnjGZlwOGblvmiRq1USD85H23gov5kuKzlgf
xKJCzlYG+TgaM0ZR43J4kk0E13QrRkYgPoC0rpm6X7mdYScLo5Hvcw8OfKR5akpA
xhxpkX0+42ftbvDVeG7oI6Yg+HZUTS6Vp5aqrW4bykaAst3dEXKHhBczyx05zqmZ
np6aymSz13Stl5IqIhoJaOGprN+iRhxm+iT+b+J2JH0W4sA/rVxkOZ2FXAtPP0JJ
tY69SYZCBf216dV8UKGSr8/1WiBVlxjmgbzXvrVKGv9BiPza/1jRGm44Em8y6Cc=
=BQi2
-----END PGP SIGNATURE-----
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio bugfix from Michael Tsirkin:
"It turns out balloon does not handle IOMMUs correctly. We should fix
that at some point, for now let's just disable this configuration"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_balloon: disable VIOMMU support
Pull i2c fixes from Wolfram Sang:
"Two driver bugfixes"
* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: ismt: fix wrong device address when unmap the data buffer
i2c: rcar: use correct length when unmapping DMA
Pull MIPS fixes from Ralf Baechle:
- Three highmem fixes:
+ Fixed mapping initialization
+ Adjust the pkmap location
+ Ensure we use at most one page for PTEs
- Fix makefile dependencies for .its targets to depend on vmlinux
- Fix reversed condition in BNEZC and JIALC software branch emulation
- Only flush initialized flush_insn_slot to avoid NULL pointer
dereference
- perf: Remove incorrect odd/even counter handling for I6400
- ftrace: Fix init functions tracing
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: .its targets depend on vmlinux
MIPS: Fix bnezc/jialc return address calculation
MIPS: kprobes: flush_insn_slot should flush only if probe initialised
MIPS: ftrace: fix init functions tracing
MIPS: mm: adjust PKMAP location
MIPS: highmem: ensure that we don't use more than one page for PTEs
MIPS: mm: fixed mappings: correct initialisation
MIPS: perf: Remove incorrect odd/even counter handling for I6400
virtio balloon bypasses the DMA API entirely so does not support the
VIOMMU right now. It's not clear we need that support, for now let's
just make sure we don't pretend to support it.
Cc: stable@vger.kernel.org
Cc: Wei Wang <wei.w.wang@intel.com>
Fixes: 1a93769399 ("virtio: new feature to detect IOMMU device quirk")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Pull x86 fixes from Thomas Gleixner:
"Two fixlets for x86:
- Handle WARN_ONs proper with the new UD based WARN implementation
- Disable 1G mappings when 2M mappings are disabled by kmemleak or
debug_pagealloc. Otherwise 1G mappings might still be used,
confusing the debug mechanisms"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Disable 1GB direct mappings when disabling 2MB mappings
x86/debug: Handle early WARN_ONs proper
Pull timer fixes from Thomas Gleixner:
"Three fixlets for timers:
- Two hot-fixes for the alarmtimer based posix timers, which prevent
a nasty DOS by self rescheduling timers. The proper cleanup of that
mess is queued for 4.13
- Make a function static"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tick/broadcast: Make tick_broadcast_setup_oneshot() static
alarmtimer: Rate limit periodic intervals
alarmtimer: Prevent overflow of relative timers
Pull scheduler fixes from Thomas Gleixner:
"Two small fixes for the schedulre core:
- Use the proper switch_mm() variant in idle_task_exit() because that
code is not called with interrupts disabled.
- Fix a confusing typo in a printk"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/core: Idle_task_exit() shouldn't use switch_mm_irqs_off()
sched/fair: Fix typo in printk message
Pull perf fixes from Thomas Gleixner:
"Three fixes for the perf user space side:
- Fix the probing of precise_ip level, which got broken recently for
x86.
- Unbreak the ARCH=x86_64 build
- Report module before trying to unwind into the module code, which
avoids broken stack frames displayed"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf unwind: Report module before querying isactivation in dwfl unwind
perf tools: Fix build with ARCH=x86_64
perf evsel: Fix probing of precise_ip level for default cycles event
Pull irq fix from Thomas Gleixner:
"Add a missing resource release to an error path"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq: Release resources in __setup_irq() error path
Pull objtool fix from Thomas Gleixner:
"A single fix which adds fortify_panic to the list of no return
functions"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Add fortify_panic as __noreturn function
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=GOju
-----END PGP SIGNATURE-----
Merge tag 'led_fixes_for_4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
Pull LED fixes from Jacek Anaszewski:
"Two LED fixes:
- fix signal source assignment for leds-bcm6328
- revert patch that intended to fix LED behavior on suspend but it
had a side effect preventing suspend at all due to uevent being
sent on trigger removal"
* tag 'led_fixes_for_4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
Revert "leds: handle suspend/resume in heartbeat trigger"
leds: bcm6328: fix signal source assignment for leds 4 to 7
Here are some small gadget and xhci USB fixes for 4.12-rc6.
Nothing major, but one of the gadget patches does fix a reported oops,
and the xhci ones resolve reported problems. All have been in
linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWUUFyA8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ylQ4gCfYyKEsNf9NDKTEw9vNmCNRpsHMa4AoMmdVqmb
lyQAz7Uw2liD+XeBj/qJ
=eAqv
-----END PGP SIGNATURE-----
Merge tag 'usb-4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small gadget and xhci USB fixes for 4.12-rc6.
Nothing major, but one of the gadget patches does fix a reported oops,
and the xhci ones resolve reported problems. All have been in
linux-next with no reported issues"
* tag 'usb-4.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: gadgetfs, dummy-hcd, net2280: fix locking for callbacks
usb: xhci: ASMedia ASM1042A chipset need shorts TX quirk
usb: xhci: Fix USB 3.1 supported protocol parsing
USB: gadget: fix GPF in gadgetfs
usb: gadget: composite: make sure to reactivate function on unbind
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>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCWUUGfg8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+yk/DwCeJUyPGQ4tFdiUvxG08bJyRT87B/IAn1jZKka3
n2+JfDEiNBlq+w2eneXG
=wXYh
-----END PGP SIGNATURE-----
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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
iQEcBAABCAAGBQJZRTAEAAoJEEp/3jgCEfOLNwcH/jfzGqhOS262fU5FCCowfNVJ
9ANzXiRpWykaHR7iPXOTRmRUqCJOCzhogmwzjnl7bQUX7cJPsFN+R7l9KR+dCAUX
300dplDWZ5oQCX2c7A7vzRCIgv4wjQjtS0mo+dY/EBCNYcynoAUVmbr/87Ezrroi
qfmA6pnI6hI527RLBkwIObljoAiy11MjQ1xFj0zS2bckWxfCSauO1v1qSpMhawkn
v4fAWEKz3y8oUG3MtT7/Ukx4/GJAOcksxKZf93AW0sNwQozCxvB40D/Dda3NcT4s
xYVVymUTYGTg1I/CmZHZxSqJwtKUOZJLwMFTXEFyo6bQH0Vj2pw/HaRf8Q5ksOU=
=ClP/
-----END PGP SIGNATURE-----
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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=U99d
-----END PGP SIGNATURE-----
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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=Mnxp
-----END PGP SIGNATURE-----
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>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=vT1k
-----END PGP SIGNATURE-----
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.
-----BEGIN PGP SIGNATURE-----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=NGL4
-----END PGP SIGNATURE-----
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
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=rpeB
-----END PGP SIGNATURE-----
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
-----BEGIN PGP SIGNATURE-----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=rLT4
-----END PGP SIGNATURE-----
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
-----BEGIN PGP SIGNATURE-----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=blNV
-----END PGP SIGNATURE-----
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
-----BEGIN PGP SIGNATURE-----
iQEcBAABAgAGBQJZQsKuAAoJEKbMaAwKp364h3AH/iwEDFtwPAzFo68U2eiFwIXy
ytkgejeb+JGEP1merD6rzaOcHROgTNEtVqLhbOAU4iU1uNCiok+1m1aVjwQRaj3s
hPG0R6zfm5/nqlXnI6ZWDqg8ZkbVrAXeGVLHWuGHna0LLozlVbxOxYAiI7E1YhpI
bsQi4hZ7L6z4Jlb25BqmkvM/de+Z9JhuHOrwVNsBdkM8xwWsdOCSH1EsawM+fP7F
p5CuBKbtKb6ADGHsiXimsIQksYnAmWfgjxR6hUvZft6h2EOp08KaIorOKDZfBE2u
oBSJT/XASHJ4o/EwjpeQiIoqnHk5lD/LbESg8PK2dFZdqhnW8fxGJWwGcL+zF+Q=
=kcZm
-----END PGP SIGNATURE-----
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
Linus Torvalds