commit: 91d80a84bbc8f28375cca7e65ec666577b4209ad
From: Zhao Hongjiang <zhaohongjiang@xxxxxxxxxx>
Date: Fri, 26 Apr 2013 11:03:53 +0800
Subject: 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@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
---
fs/aio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/aio.c b/fs/aio.c
index 3f941f2..1dc8786 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;
}
--
1.7.10.4
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