Commit fc27691f authored May 01, 2014 by Ming Lei Committed by Jens Axboe May 01, 2014

block: null_blk: fix use after free



entry(cmd->ll_list) may belong to new request once end_cmd()
returns, so fix the bug with the patch.

Without the change, it is easy to observe oops when
doing null_blk(timer) test.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent ec4a3407

drivers/block/null_blk.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -203,8 +203,8 @@ static enum hrtimer_restart null_cmd_timer_expired(struct hrtimer *timer)
		entry = llist_reverse_order(entry);
		do {
		cmd = container_of(entry, struct nullb_cmd, ll_list);
		end_cmd(cmd);
		entry = entry->next;
		end_cmd(cmd);
		} while (entry);
		}

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