Re: [PATCH v2] kasan: avoid overflowing quarantine size on low memory systems

From: Andrey Ryabinin
Date: Wed Aug 03 2016 - 02:54:26 EST


On 08/02/2016 01:27 PM, Alexander Potapenko wrote:
> 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.
>
> Reported-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
> Fixes: 55834c59098d ("mm: kasan: initial memory quarantine
> implementation")
> Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>

Acked-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>