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aio: fix possible invalid memory access when DEBUG is enabled 

dprintk() shouldn't access @ring after it's unmapped.

Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Zhao Hongjiang 2013-04-26 11:03:53 +08:00 committed by Linus Torvalds
parent 697dfd8844
commit 91d80a84bb
1 changed files with 1 additions and 1 deletions
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2
fs/aio.c
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@ -1029,9 +1029,9 @@ static int aio_read_evt(struct kioctx *ioctx, struct io_event *ent)
spin_unlock(&info->ring_lock);
out:
kunmap_atomic(ring);
dprintk("leaving aio_read_evt: %d h%lu t%lu\n", ret,
(unsigned long)ring->head, (unsigned long)ring->tail);
kunmap_atomic(ring);
return ret;
}