mm/mempool: avoid KASAN marking mempool poison checks as use-after-free
authorMatthew Dawson <matthew@mjdsystems.ca>
Fri, 11 Mar 2016 21:08:07 +0000 (13:08 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 12 Mar 2016 00:17:47 +0000 (16:17 -0800)
commit7640131032db9118a78af715ac77ba2debeeb17c
treef95d88b244a0d55b0cc9461542826888db62c6a9
parent2a4fb270daa9c1f1d1b86a53d66ed86cc64ad232
mm/mempool: avoid KASAN marking mempool poison checks as use-after-free

When removing an element from the mempool, mark it as unpoisoned in KASAN
before verifying its contents for SLUB/SLAB debugging.  Otherwise KASAN
will flag the reads checking the element use-after-free writes as
use-after-free reads.

Signed-off-by: Matthew Dawson <matthew@mjdsystems.ca>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/mempool.c