[dm-devel] [PATCH 2/3] Do not access the bio after generic_make_request
Olaf Kirch
okir at lst.de
Wed Mar 21 07:06:44 UTC 2007
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 at oracle.com
---
drivers/md/dm-crypt.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Index: linux-2.6.20/drivers/md/dm-crypt.c
===================================================================
--- linux-2.6.20.orig/drivers/md/dm-crypt.c
+++ linux-2.6.20/drivers/md/dm-crypt.c
@@ -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);
}
}
--
Olaf Kirch | --- o --- Nous sommes du soleil we love when we play
okir at lst.de | / | \ sol.dhoop.naytheet.ah kin.ir.samse.qurax
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