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linux/mm/kasan
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Alexander Potapenko c3cee37228 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: 55834c5909 ("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>
 		2016-08-02 17:31:41 -04:00
..
Makefile mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB 2016-07-28 16:07:41 -07:00
kasan.c kasan: improve double-free reports 2016-08-02 17:31:41 -04:00
kasan.h kasan: improve double-free reports 2016-08-02 17:31:41 -04:00
kasan_init.c x86/kasan, mm: Introduce generic kasan_populate_zero_shadow() 2015-08-22 14:54:55 +02:00
quarantine.c kasan: avoid overflowing quarantine size on low memory systems 2016-08-02 17:31:41 -04:00
report.c kasan: improve double-free reports 2016-08-02 17:31:41 -04:00