Jan Kara a61d90d75d jbd: fix race in buffer processing in commit code ... In commit code, we scan buffers attached to a transaction. During this scan, we sometimes have to drop j_list_lock and then we recheck whether the journal buffer head didn't get freed by journal_try_to_free_buffers(). But checking for buffer_jbd(bh) isn't enough because a new journal head could get attached to our buffer head. So add a check whether the journal head remained the same and whether it's still at the same transaction and list. This is a nasty bug and can cause problems like memory corruption (use after free) or trigger various assertions in JBD code (observed). Signed-off-by: Jan Kara <jack@suse.cz> Cc: <stable@kernel.org> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-06-09 16:59:03 -07:00
..
checkpoint.c
commit.c	jbd: fix race in buffer processing in commit code	2009-06-09 16:59:03 -07:00
journal.c
Kconfig
Makefile
recovery.c
revoke.c
transaction.c