kernel_samsung_sm7125

jenna

History

Jiri Kosina 10b3a32d29 random: fix accounting race condition with lockless irq entropy_count update Commit `902c098a36` ("random: use lockless techniques in the interrupt path") turned IRQ path from being spinlock protected into lockless cmpxchg-retry update. That commit removed r->lock serialization between crediting entropy bits from IRQ context and accounting when extracting entropy on userspace read path, but didn't turn the r->entropy_count reads/updates in account() to use cmpxchg as well. It has been observed, that under certain circumstances this leads to read() on /dev/urandom to return 0 (EOF), as r->entropy_count gets corrupted and becomes negative, which in turn results in propagating 0 all the way from account() to the actual read() call. Convert the accounting code to be the proper lockless counterpart of what has been partially done by `902c098a36`. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Greg KH <greg@kroah.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		12 years ago
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agp	drm/i915: Disable WC PTE updates to w/a buggy IOMMU on ILK	12 years ago
hw_random	drivers/char/hw_random: don't check resource with devm_ioremap_resource	12 years ago
ipmi	ipmi: ipmi_devintf: compat_ioctl method fails to take ipmi_mutex	12 years ago
mwave	8250: three way resolve of the 8250 diffs	13 years ago
pcmcia	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	12 years ago
tpm	TPM: Retry SaveState command in suspend path	12 years ago
xilinx_hwicap	char: remove use of __devexit	12 years ago
Kconfig	tty: Added a CONFIG_TTY option to allow removal of TTY	12 years ago
Makefile	IPMI: Change link order	12 years ago
apm-emulation.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/apm	13 years ago
applicom.c	applicom: use correct array offset	12 years ago
applicom.h	…
bfin-otp.c	…
bsr.c	powerpc/BSR: cleanup the error path of bsr_init	13 years ago
ds1302.c	Remove all #inclusions of asm/system.h	13 years ago
ds1620.c	ds1620: single_open() leak	12 years ago
dsp56k.c	new helper: file_inode(file)	12 years ago
dtlk.c	new helper: file_inode(file)	12 years ago
efirtc.c	rtc: single_open() leaks	12 years ago
generic_nvram.c	…
genrtc.c	rtc: single_open() leaks	12 years ago
hangcheck-timer.c	…
hpet.c	vm: convert HPET mmap to vm_iomap_memory() helper	12 years ago
i8k.c	…
lp.c	Char: lp, protect LPGETSTATUS with port_mutex	12 years ago
mbcs.c	char: remove use of __devinitconst	12 years ago
mbcs.h	…
mem.c	aio: don't include aio.h in sched.h	12 years ago
misc.c	drivers/char/misc.c:misc_register(): do not loop on misc_list unconditionally	12 years ago
mmtimer.c	drivers/char/mmtimer.c: Remove useless kfree	13 years ago
msm_smd_pkt.c	…
mspec.c	mm: kill vma flag VM_RESERVED and mm->reserved_vm counter	13 years ago
nsc_gpio.c	new helper: file_inode(file)	12 years ago
nvram.c	Remove all #inclusions of asm/system.h	13 years ago
nwbutton.c	drivers/char: removes unnecessary semicolon	13 years ago
nwbutton.h	…
nwflash.c	Merge branch 'late/fixes' into fixes	13 years ago
pc8736x_gpio.c	pc8736x_gpio: use platform_device_unregister in pc8736x_gpio_cleanup()	12 years ago
ppdev.c	new helper: file_inode(file)	12 years ago
ps3flash.c	new helper: file_inode(file)	12 years ago
random.c	random: fix accounting race condition with lockless irq entropy_count update	12 years ago
raw.c	new helper: file_inode(file)	12 years ago
rtc.c	drivers/char: removes unnecessary semicolon	13 years ago
scx200_gpio.c	…
snsc.c	…
snsc.h	…
snsc_event.c	…
sonypi.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	12 years ago
tb0219.c	new helper: file_inode(file)	12 years ago
tile-srom.c	drivers: char: Use PTR_RET function	12 years ago
tlclk.c	drivers/char/tlclk.c: fix error return code	13 years ago
toshiba.c	…
ttyprintk.c	ttyprintk: Fix NULL pointer deref by setting tty_port ops after initializing port	12 years ago
uv_mmtimer.c	…
virtio_console.c	Lots of virtio work which wasn't quite ready for last merge window. Plus	12 years ago