Commit 91d80a84 authored by Zhao Hongjiang's avatar Zhao Hongjiang Committed by Linus Torvalds
Browse files

aio: fix possible invalid memory access when DEBUG is enabled 



dprintk() shouldn't access @ring after it's unmapped.

Signed-off-by: default avatarZhao Hongjiang <zhaohongjiang@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 697dfd88

fs/aio.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

}