| From 91d80a84bbc8f28375cca7e65ec666577b4209ad 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 |
| |
| From: Zhao Hongjiang <zhaohongjiang@huawei.com> |
| |
| 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(-) |
| |
| --- a/fs/aio.c |
| +++ b/fs/aio.c |
| @@ -1094,9 +1094,9 @@ static int aio_read_evt(struct kioctx *i |
| 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; |
| } |
| |
