From: Andrey Ryabinin <aryabinin@virtuozzo.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Potapenko <glider@google.com>,
Dave Jones <davej@codemonkey.org.uk>,
Vegard Nossum <vegard.nossum@oracle.com>,
Sasha Levin <alexander.levin@verizon.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Andrey Ryabinin <aryabinin@virtuozzo.com>
Subject: [PATCH 3/6] mm/kasan, slub: don't disable interrupts when object leaves quarantine
Date: Mon, 1 Aug 2016 17:45:12 +0300 [thread overview]
Message-ID: <1470062715-14077-3-git-send-email-aryabinin@virtuozzo.com> (raw)
In-Reply-To: <1470062715-14077-1-git-send-email-aryabinin@virtuozzo.com>
SLUB doesn't require disabled interrupts to call ___cache_free().
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
---
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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next prev parent reply other threads:[~2016-08-01 14:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-01 14:45 [PATCH 1/6] mm/kasan: fix corruptions and false positive reports Andrey Ryabinin
2016-08-01 14:45 ` [PATCH 2/6] mm/kasan: don't reduce quarantine in atomic contexts Andrey Ryabinin
2016-08-02 11:42 ` Alexander Potapenko
2016-08-01 14:45 ` Andrey Ryabinin [this message]
2016-08-01 14:47 ` [PATCH 3/6] mm/kasan, slub: don't disable interrupts when object leaves quarantine Alexander Potapenko
2016-08-01 14:45 ` [PATCH 4/6] mm/kasan: get rid of ->alloc_size in struct kasan_alloc_meta Andrey Ryabinin
2016-08-01 14:45 ` [PATCH 5/6] mm/kasan: get rid of ->state " Andrey Ryabinin
2016-08-02 12:37 ` Alexander Potapenko
2016-08-01 14:45 ` [PATCH 6/6] kasan: improve double-free reports Andrey Ryabinin
2016-08-02 11:39 ` Alexander Potapenko
2016-08-02 12:05 ` Alexander Potapenko
2016-08-02 12:34 ` Andrey Ryabinin
2016-08-02 12:53 ` Alexander Potapenko
2016-08-02 16:00 ` [PATCH] kasan-improve-double-free-reports-fix Andrey Ryabinin
2016-08-01 14:45 ` [PATCH 1/6] mm/kasan: fix corruptions and false positive reports Alexander Potapenko
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