From 85d273bc26fdd491058394e6dc487b41d02e17f3 Mon Sep 17 00:00:00 2001 From: Zhao Hongjiang Date: Fri, 26 Apr 2013 11:03:53 +0800 Subject: [PATCH] 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 Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- fs/aio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/aio.c b/fs/aio.c index 71f613cf4a85..ed762aebb4ab 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; } -- 2.50.1