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authorManfred Spraul <manfred@colorfullife.com>2014-06-06 23:37:40 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-07 01:08:14 +0200
commit09c6eb1f651dad601f02435bbd79734954960c42 (patch)
tree8777788a3a4f7ebdc2805cd84d276584ecee3491 /Documentation/spi/spidev_test.c
parentipc/shm.c: check for ulong overflows in shmat (diff)
downloadlinux-09c6eb1f651dad601f02435bbd79734954960c42.tar.xz
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ipc/shm.c: check for overflows of shm_tot
shm_tot counts the total number of pages used by shm segments. If SHMALL is ULONG_MAX (or nearly ULONG_MAX), then the number can overflow. Subsequent calls to shmctl(,SHM_INFO,) would return wrong values for shm_tot. The patch adds a detection for overflows. Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Acked-by: Davidlohr Bueso <davidlohr@hp.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/spi/spidev_test.c')
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