From 6bcd3002a29b597e2774a733b74c204c1b344026 Mon Sep 17 00:00:00 2001
From: Zhao Hongjiang <zhaohongjiang@huawei.com>
Date: Fri, 26 Apr 2013 11:03:53 +0800
Subject: aio: fix possible invalid memory access when DEBUG is enabled
commit 91d80a84bbc8f28375cca7e65ec666577b4209ad upstream.
dprintk() shouldn't access @ring after it's unmapped.
Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/aio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'fs/aio.c')
diff --git a/fs/aio.c b/fs/aio.c
index e7f2fad7b4ce..cdc8dc493ed9 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1094,9 +1094,9 @@ 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;
}
--
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