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aio: fix possible invalid memory access when DEBUG is enabled
author
Zhao Hongjiang
<zhaohongjiang@huawei.com>
Fri, 26 Apr 2013 03:03:53 +0000
(11:03 +0800)
committer
Linus Torvalds
<torvalds@linux-foundation.org>
Fri, 26 Apr 2013 14:56:18 +0000
(07:56 -0700)
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>
fs/aio.c
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diff --git
a/fs/aio.c
b/fs/aio.c
index
3f941f2
..
1dc8786
100644
(file)
--- a/
fs/aio.c
+++ b/
fs/aio.c
@@
-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;
}