The patch titled
Subject: mm/kasan, slub: don't disable interrupts when object leaves quarantine
has been added to the -mm tree. Its filename is
mm-kasan-slub-dont-disable-interrupts-when-object-leaves-quarantine.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-kasan-slub-dont-disable-interrupts-when-object-leaves-quarantine.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-kasan-slub-dont-disable-interrupts-when-object-leaves-quarantine.patch
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------------------------------------------------------
From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxx
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Acked-by: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/quarantine.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff -puN mm/kasan/quarantine.c~mm-kasan-slub-dont-disable-interrupts-when-object-leaves-quarantine mm/kasan/quarantine.c
--- a/mm/kasan/quarantine.c~mm-kasan-slub-dont-disable-interrupts-when-object-leaves-quarantine
+++ a/mm/kasan/quarantine.c
@@ -147,10 +147,14 @@ static void qlink_free(struct qlist_node
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)
_
Patches currently in -mm which might be from aryabinin@xxxxxxxxxxxxx are
mm-kasan-fix-corruptions-and-false-positive-reports.patch
mm-kasan-dont-reduce-quarantine-in-atomic-contexts.patch
mm-kasan-slub-dont-disable-interrupts-when-object-leaves-quarantine.patch
mm-kasan-get-rid-of-alloc_size-in-struct-kasan_alloc_meta.patch
mm-kasan-get-rid-of-state-in-struct-kasan_alloc_meta.patch
kasan-improve-double-free-reports.patch
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