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
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kasan_init.c	x86/kasan, mm: Introduce generic kasan_populate_zero_shadow()	2015-08-22 14:54:55 +02:00
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
Makefile	mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB	2016-07-28 16:07:41 -07:00
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