Return type of work_busy() is unsigned int.
There is return statement returning boolean value, 'false' in work_busy().
It is not problem, because 'false' may be treated '0'.
However, fixing it would make code robust.
Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
8376fe22c7 ("workqueue: implement mod_delayed_work[_on]()")
implemented mod_delayed_work[_on]() using the improved
try_to_grab_pending(). The function is later used, among others, to
replace [__]candel_delayed_work() + queue_delayed_work() combinations.
Unfortunately, a delayed_work item w/ zero @delay is handled slightly
differently by mod_delayed_work_on() compared to
queue_delayed_work_on(). The latter skips timer altogether and
directly queues it using queue_work_on() while the former schedules
timer which will expire on the closest tick. This means, when @delay
is zero, that [__]cancel_delayed_work() + queue_delayed_work_on()
makes the target item immediately executable while
mod_delayed_work_on() may induce delay of upto a full tick.
This somewhat subtle difference breaks some of the converted users.
e.g. block queue plugging uses delayed_work for deferred processing
and uses mod_delayed_work_on() when the queue needs to be immediately
unplugged. The above problem manifested as noticeably higher number
of context switches under certain circumstances.
The difference in behavior was caused by missing special case handling
for 0 delay in mod_delayed_work_on() compared to
queue_delayed_work_on(). Joonsoo Kim posted a patch to add it -
("workqueue: optimize mod_delayed_work_on() when @delay == 0")[1].
The patch was queued for 3.8 but it was described as optimization and
I missed that it was a correctness issue.
As both queue_delayed_work_on() and mod_delayed_work_on() use
__queue_delayed_work() for queueing, it seems that the better approach
is to move the 0 delay special handling to the function instead of
duplicating it in mod_delayed_work_on().
Fix the problem by moving 0 delay special case handling from
queue_delayed_work_on() to __queue_delayed_work(). This replaces
Joonsoo's patch.
[1] http://thread.gmane.org/gmane.linux.kernel/1379011/focus=1379012
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-tested-by: Anders Kaseorg <andersk@MIT.EDU>
Reported-and-tested-by: Zlatko Calusic <zlatko.calusic@iskon.hr>
LKML-Reference: <alpine.DEB.2.00.1211280953350.26602@dr-wily.mit.edu>
LKML-Reference: <50A78AA9.5040904@iskon.hr>
Cc: Joonsoo Kim <js1304@gmail.com>
A rescue thread exiting TASK_INTERRUPTIBLE can lead to a task scheduling
off, never to be seen again. In the case where this occurred, an exiting
thread hit reiserfs homebrew conditional resched while holding a mutex,
bringing the box to its knees.
PID: 18105 TASK: ffff8807fd412180 CPU: 5 COMMAND: "kdmflush"
#0 [ffff8808157e7670] schedule at ffffffff8143f489
#1 [ffff8808157e77b8] reiserfs_get_block at ffffffffa038ab2d [reiserfs]
#2 [ffff8808157e79a8] __block_write_begin at ffffffff8117fb14
#3 [ffff8808157e7a98] reiserfs_write_begin at ffffffffa0388695 [reiserfs]
#4 [ffff8808157e7ad8] generic_perform_write at ffffffff810ee9e2
#5 [ffff8808157e7b58] generic_file_buffered_write at ffffffff810eeb41
#6 [ffff8808157e7ba8] __generic_file_aio_write at ffffffff810f1a3a
#7 [ffff8808157e7c58] generic_file_aio_write at ffffffff810f1c88
#8 [ffff8808157e7cc8] do_sync_write at ffffffff8114f850
#9 [ffff8808157e7dd8] do_acct_process at ffffffff810a268f
[exception RIP: kernel_thread_helper]
RIP: ffffffff8144a5c0 RSP: ffff8808157e7f58 RFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8107af60 RDI: ffff8803ee491d18
RBP: 0000000000000000 R8: 0000000000000000 R9: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Pull RCU fix from Ingo Molnar:
"Fix leaking RCU extended quiescent state, which might trigger warnings
and mess up the extended quiescent state tracking logic into thinking
that we are in "RCU user mode" while we aren't."
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rcu: Fix unrecovered RCU user mode in syscall_trace_leave()
Pull perf fixes from Ingo Molnar:
"This is mostly about unbreaking architectures that took the UAPI
changes in the v3.7 cycle, plus misc fixes."
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf kvm: Fix building perf kvm on non x86 arches
perf kvm: Rename perf_kvm to perf_kvm_stat
perf: Make perf build for x86 with UAPI disintegration applied
perf powerpc: Use uapi/unistd.h to fix build error
tools: Pass the target in descend
tools: Honour the O= flag when tool build called from a higher Makefile
tools: Define a Makefile function to do subdir processing
x86: Export asm/{svm.h,vmx.h,perf_regs.h}
perf tools: Fix strbuf_addf() when the buffer needs to grow
perf header: Fix numa topology printing
perf, powerpc: Fix hw breakpoints returning -ENOSPC
. Don't build 'perf kvm stat" on non-x86 arches, fix from Xiao Guangrong.
. UAPI fixes to get perf building again in non-x86 arches, from David Howells.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
- Don't build 'perf kvm stat" on non-x86 arches, fix from Xiao Guangrong.
- UAPI fixes to get perf building again in non-x86 arches, from David Howells.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull x86 fixes from Peter Anvin.
This includes the resume-time FPU corruption fix from the chromeos guys,
marked for stable.
* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, fpu: Avoid FPU lazy restore after suspend
x86-32: Unbreak booting on some 486 clones
x86, kvm: Remove incorrect redundant assembly constraint
Pull assorted signal-related fixes from Al Viro:
"uml regression fix (braino in sys_execve() patch) + a bunch of fucked
sigaltstack-on-rt_sigreturn uses, similar to sparc64 fix that went in
through davem's tree. m32r horrors not included - that one's waiting
for maintainer."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
microblaze: rt_sigreturn is too trigger-happy about sigaltstack errors
score: do_sigaltstack() expects a userland pointer...
sh64: fix altstack switching on sigreturn
openrisk: fix altstack switching on sigreturn
um: get_safe_registers() should be done in flush_thread(), not start_thread()
Pull CIFS fixes from Steve French:
"Two low risk, small fixes, that fix cifs regressions introduced in
3.7."
* 'for-linus' of git://git.samba.org/sfrench/cifs-2.6:
CIFS: Fix wrong buffer pointer usage in smb_set_file_info
cifs: fix writeback race with file that is growing
Pull target fix from Nicholas Bellinger:
"So just a single target fix for v3.7.0 this time around from Roland to
address a aborted command bug w/ tcm_qla2xxx fabric ports.
Also, there is one outstanding IBLOCK + virtio-blk bug that is still
being tracked down effecting v3.6.x, but AFAICT thus far this appears
to be a bug outside of target code."
* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
target: Fix handling of aborted commands
When a cpu enters S3 state, the FPU state is lost.
After resuming for S3, if we try to lazy restore the FPU for a process running
on the same CPU, this will result in a corrupted FPU context.
Ensure that "fpu_owner_task" is properly invalided when (re-)initializing a CPU,
so nobody will try to lazy restore a state which doesn't exist in the hardware.
Tested with a 64-bit kernel on a 4-core Ivybridge CPU with eagerfpu=off,
by doing thousands of suspend/resume cycles with 4 processes doing FPU
operations running. Without the patch, a process is killed after a
few hundreds cycles by a SIGFPE.
Cc: Duncan Laurie <dlaurie@chromium.org>
Cc: Olof Johansson <olofj@chromium.org>
Cc: <stable@kernel.org> v3.4+ # for 3.4 need to replace this_cpu_write by percpu_write
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Link: http://lkml.kernel.org/r/1354306532-1014-1-git-send-email-vpalatin@chromium.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Pull DRM fixes from Dave Airlie:
"Just driver fixes, nothing major, except maybe the Ironlake rc6
disable:
- intel:
* revert ironlake rc6 - we still have one ilk regression, but this
gets rid of one big one
* turn off cloning
* a directed fix for Apple edp
- radeon: one modesetting fix
- exynos: minor fixes"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
radeon: fix pll/ctrc mapping on dce2 and dce3 hardware
Revert "drm/i915: enable rc6 on ilk again"
drm/i915: do not default to 18 bpp for eDP if missing from VBT
drm/exynos: Fix potential NULL pointer dereference in exynos_drm_encoder.c
drm/exynos: Make exynos4/5_fimd_driver_data static
drm/exynos: fix overlay updating issue
drm/exynos: remove unnecessary code.
drm/exynos: fix linux framebuffer address setting.
drm/i915: disable cloning on sdvo
Merge misc fixes from Andrew Morton:
"Seven fixes, some of them fingers-crossed :("
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (7 patches)
drivers/rtc/rtc-tps65910.c: fix invalid pointer access on _remove()
mm: soft offline: split thp at the beginning of soft_offline_page()
mm: avoid waking kswapd for THP allocations when compaction is deferred or contended
revert "Revert "mm: remove __GFP_NO_KSWAPD""
mm: vmscan: fix endless loop in kswapd balancing
mm/vmemmap: fix wrong use of virt_to_page
mm: compaction: fix return value of capture_free_page()
These are three fixes for the Marvell EBU family and one for the Samsung
s3c platforms. All of them are obvious should still make it into 3.7.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"These are three fixes for the Marvell EBU family and one for the
Samsung s3c platforms. All of them are obvious should still make it
into 3.7."
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: Kirkwood: Update PCI-E fixup
Dove: Fix irq_to_pmu()
Dove: Attempt to fix PMU/RTC interrupts
ARM: S3C24XX: Fix potential NULL pointer dereference error
These were originally prepared by Krzysztof Halasa but not submitted
in time for v3.7 due to some confusion about how ixp4xx patches should
be handled. Jason Cooper thankfully offered to help out sending the
patches upstream through arm-soc now, but given the timing, we could
as well delay them for 3.8.
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Merge tag 'ixp4xx-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM ixp4xx bug fixes from Arnd Bergmann:
"These were originally prepared by Krzysztof Halasa but not submitted
in time for v3.7 due to some confusion about how ixp4xx patches should
be handled. Jason Cooper thankfully offered to help out sending the
patches upstream through arm-soc now, but given the timing, we could
as well delay them for 3.8."
* tag 'ixp4xx-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
IXP4xx: use __iomem for MMIO
IXP4xx: map CPU config registers within VMALLOC region.
IXP4xx: Always ioremap() Queue Manager MMIO region at boot.
ixp4xx: Declare MODULE_FIRMWARE usage
IXP4xx crypto: MOD_AES{128,192,256} already include key size.
WAN: Remove redundant HDLC info printed by IXP4xx HSS driver.
IXP4xx: Remove time limit for PCI TRDY to enable use of slow devices.
IXP4xx: ixp4xx_crypto driver requires Queue Manager and NPE drivers.
IXP4xx: HW pseudo-random generator is available on IXP45x/46x only.
IXP4xx: Fix off-by-one bug in Goramo MultiLink platform.
IXP4xx: Fix Goramo MultiLink platform compilation.
Pull final ARM fix from Russell King:
"One final fix, spotted by Will, to do with what happens when we boot a
SMP kernel on UP."
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7586/1: sp804: set cpumask to cpu_possible_mask for clock event device
The tps65910_rtc data is registered as the platform driver data in
_probe(= ). Therefore the tps65910_rtc should be used on unregistering
the rtc device. And device pointer should be retrieved from the
platform_device structure.
This patch fixes the below oops:
Unable to handle kernel NULL pointer dereference at virtual address 00000008
Modules linked in: rtc_tps65910(-)
CPU: 0 Not tainted (3.7.0-rc7-next-20121128-g6b1f974-dirty #7)
PC is at tps65910_rtc_alarm_irq_enable+0x20/0x2c [rtc_tps65910]
(tps65910_rtc_alarm_irq_enable+0x20/0x2c [rtc_tps65910])
(tps65910_rtc_remove+0x18/0x28 [rtc_tps65910])
(platform_drv_remove+0x18/0x1c)
(__device_release_driver+0x70/0xcc)
(driver_detach+0xb4/0xb8)
(bus_remove_driver+0x7c/0xc0)
(sys_delete_module+0x148/0x21c)
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When we try to soft-offline a thp tail page, put_page() is called on the
tail page unthinkingly and VM_BUG_ON is triggered in put_compound_page().
This patch splits thp before going into the main body of soft-offlining.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
With "mm: vmscan: scale number of pages reclaimed by reclaim/compaction
based on failures" reverted, Zdenek Kabelac reported the following
Hmm, so it's just took longer to hit the problem and observe
kswapd0 spinning on my CPU again - it's not as endless like before -
but still it easily eats minutes - it helps to turn off Firefox
or TB (memory hungry apps) so kswapd0 stops soon - and restart
those apps again. (And I still have like >1GB of cached memory)
kswapd0 R running task 0 30 2 0x00000000
Call Trace:
preempt_schedule+0x42/0x60
_raw_spin_unlock+0x55/0x60
put_super+0x31/0x40
drop_super+0x22/0x30
prune_super+0x149/0x1b0
shrink_slab+0xba/0x510
The sysrq+m indicates the system has no swap so it'll never reclaim
anonymous pages as part of reclaim/compaction. That is one part of the
problem but not the root cause as file-backed pages could also be
reclaimed.
The likely underlying problem is that kswapd is woken up or kept awake
for each THP allocation request in the page allocator slow path.
If compaction fails for the requesting process then compaction will be
deferred for a time and direct reclaim is avoided. However, if there
are a storm of THP requests that are simply rejected, it will still be
the the case that kswapd is awake for a prolonged period of time as
pgdat->kswapd_max_order is updated each time. This is noticed by the
main kswapd() loop and it will not call kswapd_try_to_sleep(). Instead
it will loopp, shrinking a small number of pages and calling
shrink_slab() on each iteration.
This patch defers when kswapd gets woken up for THP allocations. For
!THP allocations, kswapd is always woken up. For THP allocations,
kswapd is woken up iff the process is willing to enter into direct
reclaim/compaction.
[akpm@linux-foundation.org: fix typo in comment]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Zdenek Kabelac <zkabelac@redhat.com>
Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robert Jennings <rcj@linux.vnet.ibm.com>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Cc: Glauber Costa <glommer@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It apepars that this patch was innocent, and we hope that "mm: avoid
waking kswapd for THP allocations when compaction is deferred or
contended" will fix the final kswapd-spinning cause.
Cc: Zdenek Kabelac <zkabelac@redhat.com>
Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robert Jennings <rcj@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kswapd does not in all places have the same criteria for a balanced
zone. Zones are only being reclaimed when their high watermark is
breached, but compaction checks loop over the zonelist again when the
zone does not meet the low watermark plus two times the size of the
allocation. This gets kswapd stuck in an endless loop over a small
zone, like the DMA zone, where the high watermark is smaller than the
compaction requirement.
Add a function, zone_balanced(), that checks the watermark, and, for
higher order allocations, if compaction has enough free memory. Then
use it uniformly to check for balanced zones.
This makes sure that when the compaction watermark is not met, at least
reclaim happens and progress is made - or the zone is declared
unreclaimable at some point and skipped entirely.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: George Spelvin <linux@horizon.com>
Reported-by: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
Reported-by: Tomas Racek <tracek@redhat.com>
Tested-by: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit ef6c5be658 ("fix incorrect NR_FREE_PAGES accounting (appears
like memory leak)") fixes a NR_FREE_PAGE accounting leak but missed the
return value which was also missed by this reviewer until today.
That return value is used by compaction when adding pages to a list of
isolated free pages and without this follow-up fix, there is a risk of
free list corruption.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
From Kukjin Kim <kgene.kim@samsung.com>:
Samsung fixes for v3.7
* 'v3.7-samsung-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: S3C24XX: Fix potential NULL pointer dereference error
This would have been ok to delay to 3.8 according to Kukjin, but since
it's an obvious bug fix and a potential NULL pointer dereference, it
seem appropriate for a late 3.7 submission.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Eliminate an erroneous invocation of rproc_shutdown inside
the error path of rproc_virtio_find_vqs.
Reported-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Pull networking fixes from David Miller:
"Some more fixes trickled in over the past few days:
1) PIM device names can overflow the IFNAMSIZ buffer unless we
properly limit the allowed indexes, fix from Eric Dumazet.
2) Under heavy load we can OOPS in icmp reply processing due to an
unchecked inet_putpeer() call. Fix from Neal Cardwell.
3) SCTP round trip calculations need to use 64-bit math to avoid
overflows, fix from Schoch Christian.
4) Fix a memory leak and an error return flub in SCTP and IRDA
triggerable by userspace. Fix from Tommi Rantala and found by the
syscall fuzzer (trinity).
5) MLX4 driver gives bogus size to memcpy() call, fix from Amir
Vadai.
6) Fix length calculation in VHOST descriptor translation, from
Michael S Tsirkin.
7) Ambassador ATM driver loops forever while loading firmware, fix
from Dan Carpenter.
8) Over MTU packets in openvswitch warn about wrong device, fix from
Jesse Gross.
9) Netfilter IPSET's netlink code can overrun a string buffer because
it's not properly limited to IFNAMSIZ. Fix from Florian Westphal.
10) PCAN USB driver sets wrong timestamp in SKB, from Oliver Hartkopp.
11) Make sure the RX ifindex always has a valid value in the CAN BCM
driver, even if we haven't received a frame yet. Fix also from
Oliver Hartkopp."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
team: fix hw_features setup
atm: forever loop loading ambassador firmware
vhost: fix length for cross region descriptor
irda: irttp: fix memory leak in irttp_open_tsap() error path
net: qmi_wwan: add Huawei E173
net/mlx4_en: Can set maxrate only for TC0
sctp: Error in calculation of RTTvar
sctp: fix -ENOMEM result with invalid user space pointer in sendto() syscall
sctp: fix memory leak in sctp_datamsg_from_user() when copy from user space fails
net: ipmr: limit MRT_TABLE identifiers
ipv4: avoid passing NULL to inet_putpeer() in icmpv4_xrlim_allow()
can: bcm: initialize ifindex for timeouts without previous frame reception
can: peak_usb: fix hwtstamp assignment
netfilter: ipset: fix netiface set name overflow
openvswitch: Store flow key len if ARP opcode is not request or reply.
openvswitch: Print device when warning about over MTU packets.
incidentally, declaring a local variable as __user (!) to make
sparse STFU is really sick. Especially since sparse had been
100% right - it *is* a bug.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Some internal kernel symbols were referenced in the exported setup.h.
This splits out the internal bits from the exported uapi bits.
Signed-off-by: Mark Salter <msalter@redhat.com>
Do this in the same way bonding does. This fixed setup resolves performance
issues when using some cards with certain offloading.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
There was a forever loop introduced here when we converted this to
request_firmware() back in 2008.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
If a single descriptor crosses a region, the
second chunk length should be decremented
by size translated so far, instead it includes
the full descriptor length.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cleanup the memory we allocated earlier in irttp_open_tsap() when we hit
this error path. The leak goes back to at least 1da177e4
("Linux-2.6.12-rc2").
Discovered with Trinity (the syscall fuzzer).
Signed-off-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The Huawei E173 is a QMI/wwan device which normally appear
as 12d1:1436 in Linux. The descriptors displayed in that
mode will be picked up by cdc_ether. But the modem has
another mode with a different device ID and a slightly
different set of descriptors. This is the mode used by
Windows like this:
3Modem: USB\VID_12D1&PID_140C&MI_00\6&3A1D2012&0&0000
Networkcard: USB\VID_12D1&PID_140C&MI_01\6&3A1D2012&0&0001
Appli.Inter: USB\VID_12D1&PID_140C&MI_02\6&3A1D2012&0&0002
PC UI Inter: USB\VID_12D1&PID_140C&MI_03\6&3A1D2012&0&0003
Reported-by: Thomas Schäfer <tschaefer@t-online.de>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
The calculation of RTTVAR involves the subtraction of two unsigned
numbers which
may causes rollover and results in very high values of RTTVAR when RTT > SRTT.
With this patch it is possible to set RTOmin = 1 to get the minimum of RTO at
4 times the clock granularity.
Change Notes:
v2)
*Replaced abs() by abs64() and long by __s64, changed patch
description.
Signed-off-by: Christian Schoch <e0326715@student.tuwien.ac.at>
CC: Vlad Yasevich <vyasevich@gmail.com>
CC: Sridhar Samudrala <sri@us.ibm.com>
CC: Neil Horman <nhorman@tuxdriver.com>
CC: linux-sctp@vger.kernel.org
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Consider the following program, that sets the second argument to the
sendto() syscall incorrectly:
#include <string.h>
#include <arpa/inet.h>
#include <sys/socket.h>
int main(void)
{
int fd;
struct sockaddr_in sa;
fd = socket(AF_INET, SOCK_STREAM, 132 /*IPPROTO_SCTP*/);
if (fd < 0)
return 1;
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = inet_addr("127.0.0.1");
sa.sin_port = htons(11111);
sendto(fd, NULL, 1, 0, (struct sockaddr *)&sa, sizeof(sa));
return 0;
}
We get -ENOMEM:
$ strace -e sendto ./demo
sendto(3, NULL, 1, 0, {sa_family=AF_INET, sin_port=htons(11111), sin_addr=inet_addr("127.0.0.1")}, 16) = -1 ENOMEM (Cannot allocate memory)
Propagate the error code from sctp_user_addto_chunk(), so that we will
tell user space what actually went wrong:
$ strace -e sendto ./demo
sendto(3, NULL, 1, 0, {sa_family=AF_INET, sin_port=htons(11111), sin_addr=inet_addr("127.0.0.1")}, 16) = -1 EFAULT (Bad address)
Noticed while running Trinity (the syscall fuzzer).
Signed-off-by: Tommi Rantala <tt.rantala@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Trinity (the syscall fuzzer) discovered a memory leak in SCTP,
reproducible e.g. with the sendto() syscall by passing invalid
user space pointer in the second argument:
#include <string.h>
#include <arpa/inet.h>
#include <sys/socket.h>
int main(void)
{
int fd;
struct sockaddr_in sa;
fd = socket(AF_INET, SOCK_STREAM, 132 /*IPPROTO_SCTP*/);
if (fd < 0)
return 1;
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = inet_addr("127.0.0.1");
sa.sin_port = htons(11111);
sendto(fd, NULL, 1, 0, (struct sockaddr *)&sa, sizeof(sa));
return 0;
}
As far as I can tell, the leak has been around since ~2003.
Signed-off-by: Tommi Rantala <tt.rantala@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 6bdf6dbd66 caused a regression
in setattr codepath that leads to files with wrong attributes.
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Use synchronize_sched_expedited() instead of synchronize_sched()
to improve mount speed.
This patch improves mount time from 0.500s to 0.013s for Jeff's
test-case.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reported-and-tested-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The SP804 driver statically initialises the cpumask of the clock event
device to be cpu_all_mask, which is derived from the compile-time
constant NR_CPUS. This breaks SMP_ON_UP systems where the interrupt
controller handling the sp804 doesn't have the irq_set_affinity callback
on the irq_chip, because the common timer code fails to identify the
device as cpu-local and ends up treating it as a broadcast device
instead.
This patch fixes the problem by using cpu_possible_mask at runtime,
which will correctly represent the possible CPUs when SMP_ON_UP is being
used.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Just a single pll/crtc regression fix.
* 'drm-fixes-3.7' of git://people.freedesktop.org/~agd5f/linux:
radeon: fix pll/ctrc mapping on dce2 and dce3 hardware
