Commit 98221eb7 authored May 09, 2007 by Olaf Kirch Committed by Linus Torvalds May 09, 2007

dm crypt: fix avoid cloned bio ref after free



Do not access the bio after generic_make_request

We should never access a bio after generic_make_request - there's no guarantee
it still exists.

Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 027581f3

drivers/md/dm-crypt.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -655,9 +655,12 @@ static void process_write(struct crypt_io *io)

		generic_make_request(clone);

		/* Do not reference clone after this - it
		* may be gone already. */

		/* out of memory -> run queues */
		if (remaining)
		congestion_wait(bio_data_dir(clone), HZ/100);
		congestion_wait(WRITE, HZ/100);
		}
		}