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authorZhao Hongjiang <zhaohongjiang@huawei.com>2013-04-26 11:03:53 +0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-26 07:56:18 -0700
commit91d80a84bbc8f28375cca7e65ec666577b4209ad (patch)
tree9b3ace831ebff07b31384e8046f88f1c0399bd6c
parent697dfd884438058b15032b0169887c742704434a (diff)
downloadlinux-91d80a84bbc8f28375cca7e65ec666577b4209ad.tar.gz
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>
-rw-r--r--fs/aio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/aio.c b/fs/aio.c
index 3f941f2a305..1dc8786f458 100644
--- 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;
}