David Rientjes 066b3aa845 oprofile: fix race condition in event_buffer free ... Looking at the 2.6.31-rc9 code, it appears there is a race condition in the event_buffer cleanup code path (shutdown). This could lead to kernel panic as some CPUs may be operating on the event buffer AFTER it has been freed. The attached patch solves the problem and makes sure CPUs check if the buffer is not NULL before they access it as some may have been spinning on the mutex while the buffer was being freed. The race may happen if the buffer is freed during pending reads. But it is not clear why there are races in add_event_entry() since all workqueues or handlers are canceled or flushed before the event buffer is freed. Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Robert Richter <robert.richter@amd.com>		2009-10-09 18:02:01 +02:00
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accessibility	…
acpi	Merge branch 'acpi-pad' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2009-10-04 15:03:00 -07:00
amba	…
ata	trivial: fix comment typo in drivers/ata/pata_hpt37x.c	2009-09-21 15:15:53 +02:00
atm	net: Make setsockopt() optlen be unsigned.	2009-09-30 16:12:20 -07:00
auxdisplay	…
base	mm: oom analysis: add shmem vmstat	2009-09-22 07:17:27 -07:00
block	Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block	2009-10-04 12:39:14 -07:00
bluetooth	pcmcia: dtl1_cs: fix pcmcia_loop_config logic	2009-09-15 10:17:16 -07:00
cdrom	sysctl: remove "struct file *" argument of ->proc_handler	2009-09-24 07:21:04 -07:00
char	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
clocksource	…
connector	connector: Removed the destruct_data callback since it is always kfree_skb()	2009-10-02 10:54:05 -07:00
cpufreq	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq	2009-09-18 09:16:57 -07:00
cpuidle	cpuidle: menu governor: reduce latency on exit	2009-09-22 07:17:45 -07:00
crypto	…
dca	…
dio	…
dma	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx into for-linus	2009-09-23 18:31:11 +10:00
edac	edac: core: remove completion-wait for complete with rcu_barrier	2009-09-24 07:21:05 -07:00
eisa	…
firewire	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
firmware	mm: don't use alloc_bootmem_low() where not strictly needed	2009-09-22 07:17:38 -07:00
gpio	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
gpu	Merge branch 'drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6	2009-09-30 08:03:00 -07:00
hid	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
hwmon	ltc4215/ltc4245: Discard obsolete detect methods	2009-10-04 22:53:42 +02:00
i2c	i2c: Hide probe errors caused by ACPI resource conflicts	2009-10-04 22:53:45 +02:00
ide	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2009-09-23 09:32:11 -07:00
idle	…
ieee1394	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
ieee802154	…
infiniband	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
input	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
isdn	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
leds	leds: leds-pca9532 - Drop unused module parameters	2009-10-04 22:53:43 +02:00
lguest	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
macintosh	macintosh: Don't assume i2c device probing always succeeds	2009-10-04 22:53:46 +02:00
mca	…
md	Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block	2009-10-04 12:39:14 -07:00
media	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
memstick	memstick: move dev_dbg	2009-09-24 07:21:05 -07:00
message	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-09-22 07:51:45 -07:00
mfd	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
misc	max6875: Discard obsolete detect method	2009-10-04 22:53:41 +02:00
mmc	Merge master.kernel.org:/home/rmk/linux-2.6-arm	2009-10-02 16:20:43 -07:00
mtd	block: use normal I/O path for discard requests	2009-10-01 21:19:30 +02:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2009-10-02 13:37:18 -07:00
nubus	…
of	of: remove "stm,m25p40" alias	2009-09-23 07:39:43 -07:00
oprofile	oprofile: fix race condition in event_buffer free	2009-10-09 18:02:01 +02:00
parisc	mm: replace various uses of num_physpages by totalram_pages	2009-09-22 07:17:38 -07:00
parport	sysctl: remove "struct file *" argument of ->proc_handler	2009-09-24 07:21:04 -07:00
pci	ACPICA: fixup after acpi_get_object_info() change	2009-09-25 14:24:22 -04:00
pcmcia	Merge master.kernel.org:/home/rmk/linux-2.6-arm	2009-10-02 16:20:43 -07:00
platform	Merge branches 'sony-laptop', 'bugzilla-14247' and 'bugzilla-14271' into release	2009-10-02 11:27:57 -04:00
pnp	ACPI: remove acpi_device.flags.hardware_id	2009-09-25 15:09:48 -04:00
power	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	2009-09-23 03:49:27 +04:00
pps	…
ps3	…
rapidio	…
regulator	regulator: fix voltage range in da9034 ldo12	2009-09-22 13:58:23 +01:00
rtc	Merge branch 'origin' into for-linus	2009-09-24 21:22:33 +01:00
s390	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
sbus	const: make block_device_operations const	2009-09-22 07:17:25 -07:00
scsi	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
serial	Merge master.kernel.org:/home/rmk/linux-2.6-arm	2009-10-02 16:20:43 -07:00
sfi	SFI: remove __init from sfi_verify_table	2009-10-03 01:16:12 -04:00
sh	…
sn	…
spi	spi-imx: strip down chipselect function to only drive the chipselect	2009-10-01 16:11:17 -07:00
ssb	ssb/sdio: fix printk format warnings	2009-09-23 11:35:41 -04:00
staging	Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging	2009-10-04 14:59:14 -07:00
tc	…
telephony	…
thermal	thermal: add missing Kconfig dependency	2009-09-19 01:41:49 -04:00
uio	const: mark struct vm_struct_operations	2009-09-27 11:39:25 -07:00
usb	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
uwb	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
video	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2009-10-02 13:37:18 -07:00
virtio	virtio: add virtio IDs file	2009-09-23 22:26:32 +09:30
vlynq	drivers/vlynq/vlynq.c: fix resource size off by 1 error	2009-09-24 07:21:05 -07:00
w1	ds2482: Discard obsolete detect method	2009-10-04 22:53:41 +02:00
watchdog	[WATCHDOG] Add support for the Avionic Design Xanthos watchdog timer.	2009-09-25 08:38:16 +00:00
xen	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
zorro	…
Kconfig	…
Makefile	Merge git://git.infradead.org/mtd-2.6	2009-09-23 10:07:49 -07:00