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    Subject[092/126] aio: fix possible invalid memory access when DEBUG is enabled
    3.6.11.3 stable review patch.
    If anyone has any objections, please let me know.

    ------------------

    From: Zhao Hongjiang <zhaohongjiang@huawei.com>

    [ Upstream commit 91d80a84bbc8f28375cca7e65ec666577b4209ad ]

    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>
    Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
    ---
    fs/aio.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/fs/aio.c b/fs/aio.c
    index 71f613c..ed762ae 100644
    --- a/fs/aio.c
    +++ b/fs/aio.c
    @@ -1027,9 +1027,9 @@ 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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