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authorAndrey Ryabinin <aryabinin@virtuozzo.com>2016-08-02 23:02:46 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-02 23:31:41 +0200
commitf7376aed6c032aab820fa36806a89e16e353a0d9 (patch)
tree1733d516f1e420338389bea26c66ef32f72b3409 /mm/kasan
parentmm/kasan: don't reduce quarantine in atomic contexts (diff)
downloadlinux-f7376aed6c032aab820fa36806a89e16e353a0d9.tar.xz
linux-f7376aed6c032aab820fa36806a89e16e353a0d9.zip
mm/kasan, slub: don't disable interrupts when object leaves quarantine
SLUB doesn't require disabled interrupts to call ___cache_free(). Link: http://lkml.kernel.org/r/1470062715-14077-3-git-send-email-aryabinin@virtuozzo.com Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan')
-rw-r--r--mm/kasan/quarantine.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c
index 65793f150d1f..4852625ff851 100644
--- a/mm/kasan/quarantine.c
+++ b/mm/kasan/quarantine.c
@@ -147,10 +147,14 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache)
struct kasan_alloc_meta *alloc_info = get_alloc_info(cache, object);
unsigned long flags;
- local_irq_save(flags);
+ if (IS_ENABLED(CONFIG_SLAB))
+ local_irq_save(flags);
+
alloc_info->state = KASAN_STATE_FREE;
___cache_free(cache, object, _THIS_IP_);
- local_irq_restore(flags);
+
+ if (IS_ENABLED(CONFIG_SLAB))
+ local_irq_restore(flags);
}
static void qlist_free_all(struct qlist_head *q, struct kmem_cache *cache)