[PATCH 3/6] mm/kasan, slub: don't disable interrupts when object leaves quarantine
From: Andrey Ryabinin <hidden>
Date: 2016-08-02 18:45:36
Also in:
lkml
Subsystem:
kasan, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
SLUB doesn't require disabled interrupts to call ___cache_free(). Signed-off-by: Andrey Ryabinin <redacted> --- mm/kasan/quarantine.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c
index 65793f1..4852625 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)
--
2.7.3
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