The check for ret being non-zero is false as ret is always
zero, hence we have redundant dead code that can be removed.
Detected with CoverityScan, CID#112968 ("Constant' variable guards
dead code (DEADCODE)'")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The extra pairs of parentheses are not needed and cause clang
warnings like this:
drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:158:32: error: equality comparison with extraneous parentheses [-Werror,-Wparentheses-equality]
if ((inst->work_bufs[i].size == 0))
~~~~~~~~~~~~~~~~~~~~~~~~^~~~
drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:158:32: note: remove extraneous parentheses around the comparison to silence this warning
if ((inst->work_bufs[i].size == 0))
~ ^ ~
drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:158:32: note: use '=' to turn this equality comparison into an assignment
if ((inst->work_bufs[i].size == 0))
^~
=
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The symptom is continuous log "mtk-jpeg 18004000.jpegdec: Context is NULL"
in kernel log. It is because the error handling in irq doesn't clear
interrupt.
The calling flow like as below when issue happen
mtk_jpeg_device_run()
mtk_jpeg_job_abort()
v4l2_m2m_job_finish() -> m2m_dev->curr_ctx = NULL;
mtk_jpeg_dec_irq()
v4l2_m2m_get_curr_priv()
-> m2m_dev->curr_ctx == NULL
-> return NULL
log "Context is NULL"
There is race condition between job_abort() and irq. In order to simplify
code, don't want to add extra flag to maintain state, empty job_abort() and
clear interrupt before v4l2_m2m_get_curr_priv() in irq.
Signed-off-by: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
Acked-by: Rick Chang <rick.chang@mediatek.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Make sure to check the number of endpoints to avoid accessing memory
beyond the endpoint array should a device lack the expected endpoints.
Note that, as far as I can tell, the gspca framework has already made
sure there is at least one endpoint in the current alternate setting so
there should be no risk for a NULL-pointer dereference here.
Fixes: b517af7228 ("V4L/DVB: gspca_konica: New gspca subdriver for
konica chipset using cams")
Cc: stable <stable@vger.kernel.org> # 2.6.37
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The are only HIST_ENTRIES worth of entries in hist_entry however the
for-loop is iterating one too many times leasing to a read access off
the end off the array ctrls->hist_entry. Fix this by iterating by
the correct number of times.
Detected by CoverityScan, CID#1415279 ("Out-of-bounds read")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This driver was merged in 2010 and never had the necessary work done
to promote it out of staging (port to rc-core), so remove it.
I have not managed to track down the hardware. If anyone has the
hardware and would like a driver for it, please contact me and
hopefully we can work together to write a new driver.
Signed-off-by: Sean Young <sean@mess.org>
Cc: Oliver Stabel <oliver.stabel@gmx.de>
Cc: Tim Davies <tim@opensystems.net.au>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Ensure that the timer is ready before we request interrupts.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Make the code more readable and clean up the includes list.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Support for these sir ports is not compiled in by default, it has to
be enabled by manually defining LIRC_TEKRAM, LIRC_SIR_ACTISYS_ACT200L
or LIRC_SIR_ACTISYS_ACT220L somewhere. This cannot be done from Kconfig
at all so remove them from the driver.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Some fields are left blank.
Cc: stable@vger.kernel.org # v4.11
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Merge tag 'v4.11-rc5' into patchwork
Linux 4.11-rc5
* tag 'v4.11-rc5': (1168 commits)
Linux 4.11-rc5
tty: pl011: fix earlycon work-around for QDF2400 erratum 44
kasan: do not sanitize kexec purgatory
drivers/rapidio/devices/tsi721.c: make module parameter variable name unique
mm/hugetlb.c: don't call region_abort if region_chg fails
kasan: report only the first error by default
hugetlbfs: initialize shared policy as part of inode allocation
mm: fix section name for .data..ro_after_init
mm, hugetlb: use pte_present() instead of pmd_present() in follow_huge_pmd()
mm: workingset: fix premature shadow node shrinking with cgroups
mm: rmap: fix huge file mmap accounting in the memcg stats
mm: move mm_percpu_wq initialization earlier
mm: migrate: fix remove_migration_pte() for ksm pages
nfs: flexfiles: fix kernel OOPS if MDS returns unsupported DS type
NFSv4.1 fix infinite loop on IO BAD_STATEID error
serial: 8250_EXAR: fix duplicate Kconfig text and add missing help text
tty/serial: atmel: fix TX path in atmel_console_write()
tty/serial: atmel: fix race condition (TX+DMA)
serial: mxs-auart: Fix baudrate calculation
irqchip/mips-gic: Fix Local compare interrupt
...
Couple of minor fixes for 4.11
- array bound fix for __get_unmap_pool()
- cyclic period splitting for bcm2835
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Merge tag 'dmaengine-fix-4.11-rc5' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
"A couple of minor fixes for 4.11:
- array bound fix for __get_unmap_pool()
- cyclic period splitting for bcm2835"
* tag 'dmaengine-fix-4.11-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
dmaengine: Fix array index out of bounds warning in __get_unmap_pool()
dmaengine: bcm2835: Fix cyclic DMA period splitting
Pull x86 fixes from Thomas Gleixner:
"This update provides:
- prevent KASLR from randomizing EFI regions
- restrict the usage of -maccumulate-outgoing-args and document when
and why it is required.
- make the Global Physical Address calculation for UV4 systems work
correctly.
- address a copy->paste->forgot-edit problem in the MCE exception
table entries.
- assign a name to AMD MCA bank 3, so the sysfs file registration
works.
- add a missing include in the boot code"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot: Include missing header file
x86/mce/AMD: Give a name to MCA bank 3 when accessed with legacy MSRs
x86/build: Mostly disable '-maccumulate-outgoing-args'
x86/mm/KASLR: Exclude EFI region from KASLR VA space randomization
x86/mce: Fix copy/paste error in exception table entries
x86/platform/uv: Fix calculation of Global Physical Address
Pull scheduler fixes from Thomas Gleixner:
"This update provides:
- make the scheduler clock switch to unstable mode smooth so the
timestamps stay at microseconds granularity instead of switching to
tick granularity.
- unbreak perf test tsc by taking the new offset into account which
was added in order to proveide better sched clock continuity
- switching sched clock to unstable mode runs all clock related
computations which affect the sched clock output itself from a work
queue. In case of preemption sched clock uses half updated data and
provides wrong timestamps. Keep the math in the protected context
and delegate only the static key switch to workqueue context.
- remove a duplicate header include"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/headers: Remove duplicate #include <linux/sched/debug.h> line
sched/clock: Fix broken stable to unstable transfer
sched/clock, x86/perf: Fix "perf test tsc"
sched/clock: Fix clear_sched_clock_stable() preempt wobbly
Pull EFI fix from Thomas Gleixner:
"Downgrade the missing ESRT header printk to warning level and remove a
useless error printk which just generates noise for no value"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/esrt: Cleanup bad memory map log messages
Pull timer fixes from Thomas Gleixner:
"Two small fixes for the new CLKEVT_OF infrastructure"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
vmlinux.lds: Add __clkevt_of_table to kernel
clockevents: Fix syntax error in clkevt-of macro
Pull irq fixes from Thomas Gleixner:
"Two small fixlets:
- select a required Kconfig to make the MVEBU driver compile
- add the missing MIPS local GIC interrupts which prevent drivers to
probe successfully"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/mips-gic: Fix Local compare interrupt
irqchip/mvebu-odmi: Select GENERIC_MSI_IRQ_DOMAIN
Pull core fix from Thomas Gleixner:
"Prevent leaking kernel memory via /proc/$pid/syscall when the queried
task is not in a syscall"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lib/syscall: Clear return values when no stack
Pull parisc fixes from Helge Deller:
"Al Viro reported that - in case of read faults - our copy_from_user()
implementation may claim to have copied more bytes than it actually
did. In order to fix this bug and because of the way how gcc optimizes
register usage for inline assembly in C code, we had to replace our
pa_memcpy() function with a pure assembler implementation.
While fixing the memcpy bug we noticed some other issues with our
get_user() and put_user() functions, e.g. nested faults may return
wrong data. This is now fixed by a common fixup handler for
get_user/put_user in the exception handler which additionally makes
generated code smaller and faster.
The third patch is a trivial one-line fix for a patch which went in
during 4.11-rc and which avoids stalled CPU warnings after power
shutdown (for parisc machines which can't plug power off themselves).
Due to the rewrite of pa_memcpy() into assembly this patch got bigger
than what I wanted to have sent at this stage.
Those patches have been running in production during the last few days
on our debian build servers without any further issues"
* 'parisc-4.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Avoid stalled CPU warnings after system shutdown
parisc: Clean up fixup routines for get_user()/put_user()
parisc: Fix access fault handling in pa_memcpy()
Thirteen small fixes: The hopefully final effort to get the lpfc nvme
kconfig problems sorted, there's one important sg fix (user can induce
read after end of buffer) and one minor enhancement (adding an extra
PCI ID to qedi). The rest are a set of minor fixes, which mostly occur
as user visible in error legs or on specific devices.
Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Thirteen small fixes: The hopefully final effort to get the lpfc nvme
kconfig problems sorted, there's one important sg fix (user can induce
read after end of buffer) and one minor enhancement (adding an extra
PCI ID to qedi). The rest are a set of minor fixes, which mostly occur
as user visible in error legs or on specific devices"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: ufs: remove the duplicated checking for supporting clkscaling
scsi: lpfc: fix building without debugfs support
scsi: lpfc: Fix PT2PT PRLI reject
scsi: hpsa: fix volume offline state
scsi: libsas: fix ata xfer length
scsi: scsi_dh_alua: Warn if the first argument of alua_rtpg_queue() is NULL
scsi: scsi_dh_alua: Ensure that alua_activate() calls the completion function
scsi: scsi_dh_alua: Check scsi_device_get() return value
scsi: sg: check length passed to SG_NEXT_CMD_LEN
scsi: ufshcd-platform: remove the useless cast in ERR_PTR/IS_ERR
scsi: qedi: Add PCI device-ID for QL41xxx adapters.
scsi: aacraid: Fix potential null access
scsi: qla2xxx: Fix crash in qla2xxx_eh_abort on bad ptr
Merge misc fixes from Andrew Morton:
"11 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
kasan: do not sanitize kexec purgatory
drivers/rapidio/devices/tsi721.c: make module parameter variable name unique
mm/hugetlb.c: don't call region_abort if region_chg fails
kasan: report only the first error by default
hugetlbfs: initialize shared policy as part of inode allocation
mm: fix section name for .data..ro_after_init
mm, hugetlb: use pte_present() instead of pmd_present() in follow_huge_pmd()
mm: workingset: fix premature shadow node shrinking with cgroups
mm: rmap: fix huge file mmap accounting in the memcg stats
mm: move mm_percpu_wq initialization earlier
mm: migrate: fix remove_migration_pte() for ksm pages
Here are some small USB fixes for 4.11-rc5.
The usual xhci fixes are here, as well as a fix for
yet-another-bug-found-by-KASAN, those developers are doing great stuff
here. And there's a phy build warning fix that showed up in 4.11-rc1.
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB fixes for 4.11-rc5.
The usual xhci fixes are here, as well as a fix for yet-another-bug-
found-by-KASAN, those developers are doing great stuff here.
And there's a phy build warning fix that showed up in 4.11-rc1.
All of these have been in linux-next with no reported issues"
* tag 'usb-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: phy: isp1301: Fix build warning when CONFIG_OF is disabled
xhci: Manually give back cancelled URB if we can't queue it for cancel
xhci: Set URB actual length for stopped control transfers
xhci: plat: Register shutdown for xhci_plat
USB: fix linked-list corruption in rh_call_control()
Here are some small fixes for some serial drivers and Kconfig help text
for 4.11-rc5. Nothing major here at all, a few things resolving
reported bugs in some random serial drivers.
I don't think these made the last linux-next due to me getting to them
yesterday, but I am not sure, they might have snuck in. The patches
only affect drivers that the maintainers of sent me these patches for,
so we should be safe here :)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small fixes for some serial drivers and Kconfig help
text for 4.11-rc5. Nothing major here at all, a few things resolving
reported bugs in some random serial drivers.
I don't think these made the last linux-next due to me getting to them
yesterday, but I am not sure, they might have snuck in. The patches
only affect drivers that the maintainers of sent me these patches for,
so we should be safe here :)"
* tag 'tty-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: pl011: fix earlycon work-around for QDF2400 erratum 44
serial: 8250_EXAR: fix duplicate Kconfig text and add missing help text
tty/serial: atmel: fix TX path in atmel_console_write()
tty/serial: atmel: fix race condition (TX+DMA)
serial: mxs-auart: Fix baudrate calculation
- Drop the unconditional setting of the '-Os' gcc flag from the ACPI
Makefile to make the function graph tracer work correctly with the
ACPI subsystem (Josh Poimboeuf).
- Add missing synchronize_rcu() to ghes_remove() which removes an
element from an RCU-protected list, but fails to synchronize it
properly afterward (James Morse).
- Fix two problems related to IOAPIC hotplug, a local variable
initialization in setup_res() and the creation of platform
device objects for IO(x)APICs which are (a) unused and (b) leaked
on hot-removal (Joerg Roedel).
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Merge tag 'acpi-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These fix two issues related to IOAPIC hotplug, an overzealous build
optimization that prevents the function graph tracer from working with
the ACPI subsystem correctly and an RCU synchronization issue in the
ACPI APEI code.
Specifics:
- drop the unconditional setting of the '-Os' gcc flag from the ACPI
Makefile to make the function graph tracer work correctly with the
ACPI subsystem (Josh Poimboeuf).
- add missing synchronize_rcu() to ghes_remove() which removes an
element from an RCU-protected list, but fails to synchronize it
properly afterward (James Morse).
- fix two problems related to IOAPIC hotplug, a local variable
initialization in setup_res() and the creation of platform device
objects for IO(x)APICs which are (a) unused and (b) leaked on
hot-removal (Joerg Roedel)"
* tag 'acpi-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: Fix incompatibility with mcount-based function graph tracing
ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal
ACPI: Do not create a platform_device for IOAPIC/IOxAPIC
ACPI: ioapic: Clear on-stack resource before using it
- Symbolic links from CPU directories to the corresponding cpufreq
policy directories in sysfs are not created during initialization
in some cases which confuses user space, so prevent that from
happening (Rafael Wysocki).
- The powernv cpuidle driver fails to pass a correct cpumaks to
the cpuidle core in some cases which causes subsequent failures
to occur, so fix it (Vaidyanathan Srinivasan).
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Merge tag 'pm-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a cpufreq core issue with the initialization of the cpufreq
sysfs interface and a cpuidle powernv driver initialization issue.
Specifics:
- symbolic links from CPU directories to the corresponding cpufreq
policy directories in sysfs are not created during initialization
in some cases which confuses user space, so prevent that from
happening (Rafael Wysocki).
- the powernv cpuidle driver fails to pass a correct cpumaks to the
cpuidle core in some cases which causes subsequent failures to
occur, so fix it (Vaidyanathan Srinivasan)"
* tag 'pm-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpuidle: powernv: Pass correct drv->cpumask for registration
cpufreq: Fix creation of symbolic links to policy directories
Pull i2c fixes from Wolfram Sang:
"Two bugfixes from I2C, specifically the I2C mux section. Thanks to
peda for collecting them"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: mux: pca954x: Add missing pca9546 definition to chip_desc
Revert "i2c: mux: pca954x: Add ACPI support for pca954x"
- reading clk from driver vs. device tree [Vlad]
- Fix support for UIO in VDK platform [Alexey]
- SLC busy bit reading workaround
- build warning with kprobes header reorg
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Merge tag 'arc-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
"Accumulated fixes for ARC which I've been been sitting on for a while:
- reading clk from driver vs device tree [Vlad]
- fix support for UIO in VDK platform [Alexey]
- SLC busy bit reading workaround
- build warning with kprobes header reorg"
* tag 'arc-4.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: fix build warnings with !CONFIG_KPROBES
ARCv2: SLC: Make sure busy bit is set properly on SLC flushing
ARC: vdk: Fix support of UIO
ARCv2: make unimplemented vectors as no-ops rather than halt core
ARC: get rate from clk driver instead of reading device tree
ARC: [dts] add cpu nodes to ARCHS SMP device tree
ARC: [dts] add input clocks for cpu nodes
backchannel; fix. Also some minor refinements to the nfsd
version-setting interface that we'd like to get fixed before release.
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Merge tag 'nfsd-4.11-1' of git://linux-nfs.org/~bfields/linux
Pull nfsd fixes from Bruce Fields:
"The restriction of NFSv4 to TCP went overboard and also broke the
backchannel; fix.
Also some minor refinements to the nfsd version-setting interface that
we'd like to get fixed before release"
* tag 'nfsd-4.11-1' of git://linux-nfs.org/~bfields/linux:
svcrdma: set XPT_CONG_CTRL flag for bc xprt
NFSD: fix nfsd_reset_versions for NFSv4.
NFSD: fix nfsd_minorversion(.., NFSD_AVAIL)
NFSD: further refinement of content of /proc/fs/nfsd/versions
nfsd: map the ENOKEY to nfserr_perm for avoiding warning
SUNRPC/backchanel: set XPT_CONG_CTRL flag for bc xprt
The work-around for the Qualcomm Datacenter Technologies QDF2400
erratum 44 sets the "qdf2400_e44_present" global variable if the
work-around is needed. However, this check does not happen until after
earlycon is initialized, which means the work-around is not
used, and the console hangs as soon as it displays one character.
Fixes: d8a4995bce ("tty: pl011: Work around QDF2400 E44 stuck BUSY bit")
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull btrfs fixes from Chris Mason:
"We have three small fixes queued up in my for-linus-4.11 branch"
* 'for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix an integer overflow check
btrfs: Change qgroup_meta_rsv to 64bit
Btrfs: bring back repair during read
kbuild test robot reported a non-static variable name collision between
a staging driver and a RapidIO driver, with a generic variable name of
'dbg_level'.
Both drivers should be changed so that they don't use this generic
public variable name. This patch fixes the RapidIO driver but does not
change the user interface (name) for the module parameter.
drivers/staging/built-in.o:(.bss+0x109d0): multiple definition of `dbg_level'
drivers/rapidio/built-in.o:(.bss+0x16c): first defined here
Link: http://lkml.kernel.org/r/ab527fc5-aa3c-4b07-5d48-eef5de703192@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Jérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Changes to hugetlbfs reservation maps is a two step process. The first
step is a call to region_chg to determine what needs to be changed, and
prepare that change. This should be followed by a call to call to
region_add to commit the change, or region_abort to abort the change.
The error path in hugetlb_reserve_pages called region_abort after a
failed call to region_chg. As a result, the adds_in_progress counter in
the reservation map is off by 1. This is caught by a VM_BUG_ON in
resv_map_release when the reservation map is freed.
syzkaller fuzzer (when using an injected kmalloc failure) found this
bug, that resulted in the following:
kernel BUG at mm/hugetlb.c:742!
Call Trace:
hugetlbfs_evict_inode+0x7b/0xa0 fs/hugetlbfs/inode.c:493
evict+0x481/0x920 fs/inode.c:553
iput_final fs/inode.c:1515 [inline]
iput+0x62b/0xa20 fs/inode.c:1542
hugetlb_file_setup+0x593/0x9f0 fs/hugetlbfs/inode.c:1306
newseg+0x422/0xd30 ipc/shm.c:575
ipcget_new ipc/util.c:285 [inline]
ipcget+0x21e/0x580 ipc/util.c:639
SYSC_shmget ipc/shm.c:673 [inline]
SyS_shmget+0x158/0x230 ipc/shm.c:657
entry_SYSCALL_64_fastpath+0x1f/0xc2
RIP: resv_map_release+0x265/0x330 mm/hugetlb.c:742
Link: http://lkml.kernel.org/r/1490821682-23228-1-git-send-email-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Disable kasan after the first report. There are several reasons for
this:
- Single bug quite often has multiple invalid memory accesses causing
storm in the dmesg.
- Write OOB access might corrupt metadata so the next report will print
bogus alloc/free stacktraces.
- Reports after the first easily could be not bugs by itself but just
side effects of the first one.
Given that multiple reports usually only do harm, it makes sense to
disable kasan after the first one. If user wants to see all the
reports, the boot-time parameter kasan_multi_shot must be used.
[aryabinin@virtuozzo.com: wrote changelog and doc, added missing include]
Link: http://lkml.kernel.org/r/20170323154416.30257-1-aryabinin@virtuozzo.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Any time after inode allocation, destroy_inode can be called. The
hugetlbfs inode contains a shared_policy structure, and
mpol_free_shared_policy is unconditionally called as part of
hugetlbfs_destroy_inode. Initialize the policy as part of inode
allocation so that any quick (error path) calls to destroy_inode will be
handed an initialized policy.
syzkaller fuzzer found this bug, that resulted in the following:
BUG: KASAN: user-memory-access in atomic_inc
include/asm-generic/atomic-instrumented.h:87 [inline] at addr
000000131730bd7a
BUG: KASAN: user-memory-access in __lock_acquire+0x21a/0x3a80
kernel/locking/lockdep.c:3239 at addr 000000131730bd7a
Write of size 4 by task syz-executor6/14086
CPU: 3 PID: 14086 Comm: syz-executor6 Not tainted 4.11.0-rc3+ #364
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
atomic_inc include/asm-generic/atomic-instrumented.h:87 [inline]
__lock_acquire+0x21a/0x3a80 kernel/locking/lockdep.c:3239
lock_acquire+0x1ee/0x590 kernel/locking/lockdep.c:3762
__raw_write_lock include/linux/rwlock_api_smp.h:210 [inline]
_raw_write_lock+0x33/0x50 kernel/locking/spinlock.c:295
mpol_free_shared_policy+0x43/0xb0 mm/mempolicy.c:2536
hugetlbfs_destroy_inode+0xca/0x120 fs/hugetlbfs/inode.c:952
alloc_inode+0x10d/0x180 fs/inode.c:216
new_inode_pseudo+0x69/0x190 fs/inode.c:889
new_inode+0x1c/0x40 fs/inode.c:918
hugetlbfs_get_inode+0x40/0x420 fs/hugetlbfs/inode.c:734
hugetlb_file_setup+0x329/0x9f0 fs/hugetlbfs/inode.c:1282
newseg+0x422/0xd30 ipc/shm.c:575
ipcget_new ipc/util.c:285 [inline]
ipcget+0x21e/0x580 ipc/util.c:639
SYSC_shmget ipc/shm.c:673 [inline]
SyS_shmget+0x158/0x230 ipc/shm.c:657
entry_SYSCALL_64_fastpath+0x1f/0xc2
Analysis provided by Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: http://lkml.kernel.org/r/1490477850-7944-1-git-send-email-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A section name for .data..ro_after_init was added by both:
commit d07a980c1b ("s390: add proper __ro_after_init support")
and
commit d7c19b066d ("mm: kmemleak: scan .data.ro_after_init")
The latter adds incorrect wrapping around the existing s390 section, and
came later. I'd prefer the s390 naming, so this moves the s390-specific
name up to the asm-generic/sections.h and renames the section as used by
kmemleak (and in the future, kernel/extable.c).
Link: http://lkml.kernel.org/r/20170327192213.GA129375@beast
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [s390 parts]
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Eddie Kovsky <ewk@edkovsky.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 0a6b76dd23 ("mm: workingset: make shadow node shrinker memcg
aware") enabled cgroup-awareness in the shadow node shrinker, but forgot
to also enable cgroup-awareness in the list_lru the shadow nodes sit on.
Consequently, all shadow nodes are sitting on a global (per-NUMA node)
list, while the shrinker applies the limits according to the amount of
cache in the cgroup its shrinking. The result is excessive pressure on
the shadow nodes from cgroups that have very little cache.
Enable memcg-mode on the shadow node LRUs, such that per-cgroup limits
are applied to per-cgroup lists.
Fixes: 0a6b76dd23 ("mm: workingset: make shadow node shrinker memcg aware")
Link: http://lkml.kernel.org/r/20170322005320.8165-1-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov@tarantool.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org> [4.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Huge pages are accounted as single units in the memcg's "file_mapped"
counter. Account the correct number of base pages, like we do in the
corresponding node counter.
Link: http://lkml.kernel.org/r/20170322005111.3156-1-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org> [4.8+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Yang Li has reported that drain_all_pages triggers a WARN_ON which means
that this function is called earlier than the mm_percpu_wq is
initialized on arm64 with CMA configured:
WARNING: CPU: 2 PID: 1 at mm/page_alloc.c:2423 drain_all_pages+0x244/0x25c
Modules linked in:
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.11.0-rc1-next-20170310-00027-g64dfbc5 #127
Hardware name: Freescale Layerscape 2088A RDB Board (DT)
task: ffffffc07c4a6d00 task.stack: ffffffc07c4a8000
PC is at drain_all_pages+0x244/0x25c
LR is at start_isolate_page_range+0x14c/0x1f0
[...]
drain_all_pages+0x244/0x25c
start_isolate_page_range+0x14c/0x1f0
alloc_contig_range+0xec/0x354
cma_alloc+0x100/0x1fc
dma_alloc_from_contiguous+0x3c/0x44
atomic_pool_init+0x7c/0x208
arm64_dma_init+0x44/0x4c
do_one_initcall+0x38/0x128
kernel_init_freeable+0x1a0/0x240
kernel_init+0x10/0xfc
ret_from_fork+0x10/0x20
Fix this by moving the whole setup_vmstat which is an initcall right now
to init_mm_internals which will be called right after the WQ subsystem
is initialized.
Link: http://lkml.kernel.org/r/20170315164021.28532-1-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Yang Li <pku.leo@gmail.com>
Tested-by: Yang Li <pku.leo@gmail.com>
Tested-by: Xiaolong Ye <xiaolong.ye@intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* acpi-hotplug-fixes:
ACPI: Do not create a platform_device for IOAPIC/IOxAPIC
ACPI: ioapic: Clear on-stack resource before using it
* acpi-build-fixes:
ACPI: Fix incompatibility with mcount-based function graph tracing
* acpi-apei-fixes:
ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal
Stable Bugfixes:
- Fix infinite loop on BAD_STATEID error
Other Bugfixes:
- Fix old dentry rehash after move
- Fix pnfs GETDEVINFO hangs
- Fix pnfs fallback to MDS on commit errors
- Fix flexfiles kernel oops
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Merge tag 'nfs-for-4.11-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client fixes from Anna Schumaker:
"Here are a few more bugfixes that came in over the last couple of
weeks. Most of these fix various hangs and loops that people found,
but we also had a few error handling fixes.
Stable Bugfixes:
- fix infinite loop on BAD_STATEID error
Other Bugfixes:
- fix old dentry rehash after move
- fix pnfs GETDEVINFO hangs
- fix pnfs fallback to MDS on commit errors
- fix flexfiles kernel oops"
* tag 'nfs-for-4.11-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
nfs: flexfiles: fix kernel OOPS if MDS returns unsupported DS type
NFSv4.1 fix infinite loop on IO BAD_STATEID error
PNFS fix fallback to MDS if got error on commit to DS
NFS filelayout:call GETDEVICEINFO after pnfs_layout_process completes
NFS store nfs4_deviceid in struct nfs4_filelayout_segment
NFS cleanup struct nfs4_filelayout_segment
NFS: Fix old dentry rehash after move
