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authorOlaf Kirch <olaf.kirch@oracle.com>2007-05-09 02:32:52 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:46 -0700
commit98221eb757de03d9aa6262b1eded2be708640ccc (patch)
treecef3fd80f62d6227551adc75c34023d60cbaa9c1 /drivers/md
parent027581f3515b5ec2218847dab578afa439a9d6b9 (diff)
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>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-crypt.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index db439363f97..1dc2c62200e 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);
}
}