From: olaf.kirch@oracle.com 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@oracle.com Signed-off-by: Alasdair G Kergon --- drivers/md/dm-crypt.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletion(-) Index: linux-2.6.21/drivers/md/dm-crypt.c =================================================================== --- linux-2.6.21.orig/drivers/md/dm-crypt.c 2007-05-01 17:40:48.000000000 +0100 +++ linux-2.6.21/drivers/md/dm-crypt.c 2007-05-01 17:40:48.000000000 +0100 @@ -655,9 +655,12 @@ static void process_write(struct crypt_i 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); } }