The 0-day build testing backend noticed that a string could be dereferenced
without validation. Fix that.
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Since commit 8871e99f89 ('asus-laptop: HRWS/HWRS typo'), module
initialisation is very slow on the Asus UL30A. The HWRS method takes
about 12 seconds to run, and subsequent initialisation also seems to
be delayed. Since we don't really need the result, don't bother
calling it on init. Those who are curious can still get the result
through the 'infos' device attribute.
Update the comment about HWRS in show_infos().
Reported-by: ryan <draziw+deb@gmail.com>
References: http://bugs.debian.org/692436
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
SN06 in some cases returns an Integer instead of a buffer. While the
code handling the return value was trying to cope with the difference,
the memcpy call was not making any difference between the two types of
acpi_object union. This regression was introduced in 3.5.
While there also rework the return value logic to improve readability.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=48671
Cc: <stable@vger.kernel.org>
Cc: Fabrizio Narni <shibotto@gmail.com>
Cc: <mus.svz@gmail.com>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
KEY_TOUCHPAD_TOOGLE key is for notice userland change touchpad state
via xf86-input-synaptics on the machine that don't toggle touchpad in
hardware. But, acer laptop actually toggle touchpad in hardware.
So, this patch change to emit KEY_TOUCHPAD_ON/OFF key when acer-wmi grab
device state of touchpad.
Reference: brc#848270
https://bugzilla.redhat.com/show_bug.cgi?id=848270
Tested-by: Nathanael Noblet <nathanael@gnat.ca>
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Fengguang Wu run coccinelle and warns about:
drivers/platform/x86/acer-wmi.c:1200:17-21: ERROR: obj is NULL but dereferenced.
drivers/platform/x86/acer-wmi.c:891:17-21: ERROR: obj is NULL but dereferenced.
drivers/platform/x86/acer-wmi.c:1953:17-21: ERROR: obj is NULL but dereferenced.
It causes by the code in patch 987dfbaa65 doesn't check
obj variable should not be NULL. There have risk for dereference a NULL obj, so add
this patch to fix.
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Due to I moved to use suse.com mail address, so, add patch to change the
mail address in MAINTAINERS file.
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
- Fix a permissions problem when opening NFSv4 files that only have the
exec bit set.
- Fix a couple of typos in pNFS (inverted logic), and the mount parsing
(missing pointer dereference).
- Work around a series of deadlock issues due to workqueues using
struct work_struct pointer address comparisons in the re-entrancy
tests. Ensure that we don't free struct work_struct prematurely if
our work function involves waiting for completion of other work
items (e.g. by calling rpc_shutdown_client).
- Revert the part of commit 168e4b3 that is causing unnecessary warnings
to be issued in the nfsd callback code.
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Merge tag 'nfs-for-3.8-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
- Fix a permissions problem when opening NFSv4 files that only have the
exec bit set.
- Fix a couple of typos in pNFS (inverted logic), and the mount parsing
(missing pointer dereference).
- Work around a series of deadlock issues due to workqueues using
struct work_struct pointer address comparisons in the re-entrancy
tests. Ensure that we don't free struct work_struct prematurely if
our work function involves waiting for completion of other work items
(e.g. by calling rpc_shutdown_client).
- Revert the part of commit 168e4b3 that is causing unnecessary
warnings to be issued in the nfsd callback code.
* tag 'nfs-for-3.8-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
nfs: avoid dereferencing null pointer in initiate_bulk_draining
SUNRPC: Partial revert of commit 168e4b39d1
NFS: Ensure that we free the rpc_task after read and write cleanups are done
SUNRPC: Ensure that we free the rpc_task after cleanups are done
nfs: fix null checking in nfs_get_option_str()
pnfs: Increase the refcount when LAYOUTGET fails the first time
NFS: Fix access to suid/sgid executables
Pull MIPS fixes from Ralf Baechle:
"Various fixes across the tree. The modpost error due to
virt_addr_valid() not being usable from modules required a number of
preparatory cleanups so a clean fix was possible."
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: 64-bit: Fix build if !CONFIG_MODULES
MIPS: Wire up finit_module syscall.
MIPS: Fix modpost error in modules attepting to use virt_addr_valid().
MIPS: page.h: Remove now unnecessary #ifndef __ASSEMBLY__ wrapper.
MIPS: Switch remaining assembler PAGE_SIZE users to <asm/asm-offsets.h>.
MIPS: Include PAGE_S{IZE,HIFT} in <asm/offset.h>.
MIPS: Don't include <asm/page.h> unnecessarily.
MIPS: Fix comment.
Revert "MIPS: Optimise TLB handlers for MIPS32/64 R2 cores."
MIPS: perf: Fix build failure in XLP perf support.
MIPS: Alchemy: Make 32kHz and r4k timer coexist peacefully
Merge emailed fixes from Andrew Morton:
"Bunch of fixes:
- delayed IPC updates. I held back on this because of some possible
outstanding bug reports, but they appear to have been addressed in
later versions
- A bunch of MAINTAINERS updates
- Yet Another RTC driver. I'd held this back while a couple of
little issues were being worked out.
I'm expecting an intrusive-but-simple patchset from Joe Perches which
splits up printk.c into kernel/printk/*. That will be a pig to
maintain for two months so if it passes testing I'd like to get it
upstream after a week or so."
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (35 commits)
printk: fix incorrect length from print_time() when seconds > 99999
drivers/rtc/rtc-vt8500.c: fix handling of data passed in struct rtc_time
drivers/rtc/rtc-vt8500.c: correct handling of CR_24H bitfield
rtc: add RTC driver for TPS6586x
MAINTAINERS: fix drivers/staging/sm7xx/
MAINTAINERS: remove include/linux/of_pwm.h
MAINTAINERS: remove arch/*/lib/perf_event*.c
MAINTAINERS: remove drivers/mmc/host/imxmmc.*
MAINTAINERS: fix Documentation/mei/
MAINTAINERS: remove arch/x86/platform/mrst/pmu.*
MAINTAINERS: remove firmware/isci/
MAINTAINERS: fix drivers/ieee802154/
MAINTAINERS: fix .../plat-mxc/include/mach/imxfb.h
MAINTAINERS: remove drivers/video/epson1355fb.c
MAINTAINERS: fix drivers/media/usb/dvb-usb/cxusb*
MAINTAINERS: adjust for UAPI
MAINTAINERS: fix drivers/media/platform/atmel-isi.c
MAINTAINERS: fix arch/arm/mach-at91/include/mach/at_hdmac.h
MAINTAINERS: fix drivers/rtc/rtc-vt8500.c
MAINTAINERS: remove arch/arm/plat-s5p/
...
Pull microblaze update from Michal Simek:
"This fixes noMMU kernel and I have also added defconfig updates which
fix issue with one external dependency and enable all xilinx device
drivers for 0-day testing system.
Additionally wire up finit_module system call, and do highmem fixup
and pci warnings reported by the 0-day testing system"
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Update microblaze defconfigs
microblaze: Fix pci compilation and sparse warnings
microblaze: Add finit_module syscall
microblaze: Kill __kmap_atomic()
microblaze: Change section flags for noMMU
microblaze: Microblaze wants sys_fork for noMMU too
Pull integrity subsystem regression fix from James Morris:
"Commit fdf90729e5 "ima: support new kernel module syscall" by error
modified init_module() to return INTEGRITY_UNKNOWN (which is 4) to
user space if the kernel was built with CONFIG_IMA_APPRAISE=y.
As a result, user space can no longer load kernel modules using
init_module(). This commit fixes this regression."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
ima: fallback to MODULE_SIG_ENFORCE for existing kernel module syscall
Cleanup. And I think we need more cleanups, in particular
__set_current_blocked() and sigprocmask() should die. Nobody should
ever block SIGKILL or SIGSTOP.
- Change set_current_blocked() to use __set_current_blocked()
- Change sys_sigprocmask() to use set_current_blocked(), this way it
should not worry about SIGKILL/SIGSTOP.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
print_prefix() passes a NULL buf to print_time() to get the length of
the time prefix; when printk times are enabled, the current code just
returns the constant 15, which matches the format "[%5lu.%06lu] " used
to print the time value. However, this is obviously incorrect when the
whole seconds part of the time gets beyond 5 digits (100000 seconds is a
bit more than a day of uptime).
The simple fix is to use snprintf(NULL, 0, ...) to calculate the actual
length of the time prefix. This could be micro-optimized but it seems
better to have simpler, more readable code here.
The bug leads to the syslog system call miscomputing which messages fit
into the userspace buffer. If there are enough messages to fill
log_buf_len and some have a timestamp >= 100000, dmesg may fail with:
# dmesg
klogctl: Bad address
When this happens, strace shows that the failure is indeed EFAULT due to
the kernel mistakenly accessing past the end of dmesg's buffer, since
dmesg asks the kernel how big a buffer it needs, allocates a bit more,
and then gets an error when it asks the kernel to fill it:
syslog(0xa, 0, 0) = 1048576
mmap(NULL, 1052672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa4d25d2000
syslog(0x3, 0x7fa4d25d2010, 0x100008) = -1 EFAULT (Bad address)
As far as I can see, the bug has been there as long as print_time(),
which comes from commit 084681d14e ("printk: flush continuation lines
immediately to console") in 3.5-rc5.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Joe Perches <joe@perches.com>
Cc: Sylvain Munaut <s.munaut@whatever-company.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
tm_mon is 0..11, whereas vt8500 expects 1..12 for the month field,
causing invalid date errors for January, and causing the day field to
roll over incorrectly.
The century flag is only handled in vt8500_rtc_read_time, but not set in
vt8500_rtc_set_time. This patch corrects the behaviour of the century
flag.
Signed-off-by: Edgar Toernig <froese@gmx.de>
Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Control register bitfield for 12H/24H mode is handled incorrectly.
Setting CR_24H actually enables 12H mode. This patch renames the define
and changes the initialization code to correctly set 24H mode.
Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Cc: Edgar Toernig <froese@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add an RTC driver for TPS6586X chips by TI. This driver supports:
- Setting and getting time and date.
- Setting and reading alarm time.
- Alarm and interrupt functionlity.
[akpm@linux-foundation.org: remove stray semicolons]
[akpm@linux-foundation.org: start epoch in 2009]
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This directory was moved to drivers/staging/sm7xxfb/ by commit
925aa6600c ("staging: sm7xxfb: sm7xx becomes sm7xxfb").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Teddy Wang <teddy.wang@siliconmotion.com.cn>
Acked-by: Javier Muñoz <jmunhoz@igalia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Added by commit 200efedd87 ("pwm: Take over maintainership of the PWM
subsystem"), but I could not find any trace of that file being ever
added to the repository.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Acked-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This pattern only matched arch/frv/lib/perf_event.c, which was removed
by commit e360adbe29 ("irq_work: Add generic hardirq context
callbacks").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The documentation was moved to Documentation/misc-devices/mei/ instead.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These files were removed by commit 1a8359e411 ("x86/mid: Remove Intel
Moorestown").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This directory was removed by commit 7d99b3abaf ("isci, firmware:
Remove isci fallback parameter blob and generator").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Intel SCU Linux support <intel-linux-scu@intel.com>
Cc: Lukasz Dorau <lukasz.dorau@intel.com>
Cc: Maciej Patelczyk <maciej.patelczyk@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This directory was moved to drivers/net/ieee802154/ by commit
31d178bffc ("drivers/ieee802154: move ieee802154 drivers to net
folder").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This file was moved to include/linux/platform_data/video-imxfb.h by
commit 82906b13a6 ("ARM: imx: move platform_data definitions").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This driver was removed by commit 1c3a918f78 ("ARM: clps711x: Remove
board support for CEIVA").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Christopher Hoover <ch@murgatroid.com>
Cc: Christopher Hoover <ch@hpl.hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This driver was never at dvb-usb-v2, as far as I could see.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Several headers were moved or split to uapi/.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This file was moved to drivers/media/platform/soc_camera/atmel-isi.c by
commit b47ff4a3ed ("[media] move soc_camera to its own directory").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This file was moved to include/linux/platform_data/dma-atmel.h by commit
7cdc39eead ("ARM: at91: move platform_data definitions").
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These files were merged into plat-samsung.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This file was moved to arch/arm/mach-rpc/time.c by commit a1be5d6496
("ARM: riscpc: move time-acorn.c to mach-rpc"), and the pattern for
arch/arm/mach-rpc/ already exists.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This subdirectory entry was added by commit 8a5700cd67 ("MAINTAINERS:
add drivers/platform/msm to MSM subsystem") back in 2011, but I could
not find any trace of that directory being ever added to the repository.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Cc: Kenneth Heitke <kheitke@codeaurora.org>
Acked-by: David Brown <davidb@codeaurora.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Since commit e303297e6c ("mm: extended batches for generic
mmu_gather") we are batching pages to be freed until either
tlb_next_batch cannot allocate a new batch or we are done.
This works just fine most of the time but we can get in troubles with
non-preemptible kernel (CONFIG_PREEMPT_NONE or CONFIG_PREEMPT_VOLUNTARY)
on large machines where too aggressive batching might lead to soft
lockups during process exit path (exit_mmap) because there are no
scheduling points down the free_pages_and_swap_cache path and so the
freeing can take long enough to trigger the soft lockup.
The lockup is harmless except when the system is setup to panic on
softlockup which is not that unusual.
The simplest way to work around this issue is to limit the maximum
number of batches in a single mmu_gather. 10k of collected pages should
be safe to prevent from soft lockups (we would have 2ms for one) even if
they are all freed without an explicit scheduling point.
This patch doesn't add any new explicit scheduling points because it
relies on zap_pmd_range during page tables zapping which calls
cond_resched per PMD.
The following lockup has been reported for 3.0 kernel with a huge
process (in order of hundreds gigs but I do know any more details).
BUG: soft lockup - CPU#56 stuck for 22s! [kernel:31053]
Modules linked in: af_packet nfs lockd fscache auth_rpcgss nfs_acl sunrpc mptctl mptbase autofs4 binfmt_misc dm_round_robin dm_multipath bonding cpufreq_conservative cpufreq_userspace cpufreq_powersave pcc_cpufreq mperf microcode fuse loop osst sg sd_mod crc_t10dif st qla2xxx scsi_transport_fc scsi_tgt netxen_nic i7core_edac iTCO_wdt joydev e1000e serio_raw pcspkr edac_core iTCO_vendor_support acpi_power_meter rtc_cmos hpwdt hpilo button container usbhid hid dm_mirror dm_region_hash dm_log linear uhci_hcd ehci_hcd usbcore usb_common scsi_dh_emc scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh dm_snapshot pcnet32 mii edd dm_mod raid1 ext3 mbcache jbd fan thermal processor thermal_sys hwmon cciss scsi_mod
Supported: Yes
CPU 56
Pid: 31053, comm: kernel Not tainted 3.0.31-0.9-default #1 HP ProLiant DL580 G7
RIP: 0010: _raw_spin_unlock_irqrestore+0x8/0x10
RSP: 0018:ffff883ec1037af0 EFLAGS: 00000206
RAX: 0000000000000e00 RBX: ffffea01a0817e28 RCX: ffff88803ffd9e80
RDX: 0000000000000200 RSI: 0000000000000206 RDI: 0000000000000206
RBP: 0000000000000002 R08: 0000000000000001 R09: ffff887ec724a400
R10: 0000000000000000 R11: dead000000200200 R12: ffffffff8144c26e
R13: 0000000000000030 R14: 0000000000000297 R15: 000000000000000e
FS: 00007ed834282700(0000) GS:ffff88c03f200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 000000000068b240 CR3: 0000003ec13c5000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process kernel (pid: 31053, threadinfo ffff883ec1036000, task ffff883ebd5d4100)
Call Trace:
release_pages+0xc5/0x260
free_pages_and_swap_cache+0x9d/0xc0
tlb_flush_mmu+0x5c/0x80
tlb_finish_mmu+0xe/0x50
exit_mmap+0xbd/0x120
mmput+0x49/0x120
exit_mm+0x122/0x160
do_exit+0x17a/0x430
do_group_exit+0x3d/0xb0
get_signal_to_deliver+0x247/0x480
do_signal+0x71/0x1b0
do_notify_resume+0x98/0xb0
int_signal+0x12/0x17
DWARF2 unwinder stuck at int_signal+0x12/0x17
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: <stable@vger.kernel.org> [3.0+]
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 702d1a6e07 ("memory-hotplug: fix kswapd looping forever
problem") added an isolated pageblocks counter (nr_pageblock_isolate in
struct zone) and used it to adjust free pages counter in
zone_watermark_ok_safe() to prevent kswapd looping forever problem.
Then later, commit 2139cbe627 ("cma: fix counting of isolated pages")
fixed accounting of isolated pages in global free pages counter. It
made the previous zone_watermark_ok_safe() fix unnecessary and
potentially harmful (cause now isolated pages may be accounted twice
making free pages counter incorrect).
This patch removes the special isolated pageblocks counter altogether
which fixes zone_watermark_ok_safe() free pages check.
Reported-by: Tomasz Stanislawski <t.stanislaws@samsung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Aaditya Kumar <aaditya.kumar.30@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Remove the redundant and confusing fill_copy(). Also add copy_msg()
check for error. In this case exit from the function have to be done
instead of break, because further code interprets any error as EAGAIN.
Also define copy_msg() for the case when CONFIG_CHECKPOINT_RESTORE is
disabled.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This code works if CONFIG_CHECKPOINT_RESTORE is disabled.
[akpm@linux-foundation.org: remove __maybe_unused]
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Passing and checking of msgflg to free_copy() is redundant. This patch
sets copy to NULL on declaration instead and checks for non-NULL in
free_copy().
Note: in case of copy allocation failure, error is returned immediately.
So no need to check for IS_ERR() in free_copy().
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This test can be used to check wheither kernel supports IPC message queue
copy and restore features (required by CRIU project).
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch is required for checkpoint/restore in userspace.
c/r requires some way to get all pending IPC messages without deleting
them from the queue (checkpoint can fail and in this case tasks will be
resumed, so queue have to be valid).
To achive this, new operation flag MSG_COPY for sys_msgrcv() system call
was introduced. If this flag was specified, then mtype is interpreted as
number of the message to copy.
If MSG_COPY is set, then kernel will allocate dummy message with passed
size, and then use new copy_msg() helper function to copy desired message
(instead of unlinking it from the queue).
Notes:
1) Return -ENOSYS if MSG_COPY is specified, but
CONFIG_CHECKPOINT_RESTORE is not set.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Move all message related manipulation into one function msg_fill().
Actually, two functions because of the compat one.
[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
