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authorAlexander Potapenko <glider@google.com>2016-08-02 14:02:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-02 17:31:41 -0400
commitc3cee372282cb6bcdf19ac1457581d5dd5ecb554 (patch)
treec69679c97a866019a5efde5078b85fe9e02cc54b /fs/inode.c
parent7e088978933ee186533355ae03a9dc1de99cf6c7 (diff)
kasan: avoid overflowing quarantine size on low memory systems
If the total amount of memory assigned to quarantine is less than the amount of memory assigned to per-cpu quarantines, |new_quarantine_size| may overflow. Instead, set it to zero. [akpm@linux-foundation.org: cleanup: use WARN_ONCE return value] Link: http://lkml.kernel.org/r/1470063563-96266-1-git-send-email-glider@google.com Fixes: 55834c59098d ("mm: kasan: initial memory quarantine implementation") Signed-off-by: Alexander Potapenko <glider@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/inode.c')
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