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
atm
auxdisplay
base
block	Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block	2009-10-04 12:39:14 -07:00
bluetooth
cdrom
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
cpuidle
crypto
dca
dio
dma
edac
eisa
firewire	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
firmware
gpio	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
gpu
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
idle
ieee1394
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
message
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
oprofile	oprofile: fix race condition in event_buffer free	2009-10-09 18:02:01 +02:00
parisc
parport
pci
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
power
pps
ps3
rapidio
regulator
rtc
s390	const: constify remaining file_operations	2009-10-01 16:11:11 -07:00
sbus
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
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
uio
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
vlynq
w1	ds2482: Discard obsolete detect method	2009-10-04 22:53:41 +02:00
watchdog
xen	headers: remove sched.h from poll.h	2009-10-04 15:05:10 -07:00
zorro
Kconfig
Makefile