From 12e40d6a180f668810e3706ff43e7c7186293c99 Mon Sep 17 00:00:00 2001 From: Olaf Kirch Date: Wed, 13 Jun 2007 15:59:16 -0400 Subject: [PATCH] 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 Signed-off-by: Alasdair G Kergon Cc: Jens Axboe Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Chris Wright Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-crypt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index bffaf1c20ad5..28831a9d867f 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -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); } } -- cgit v1.2.3