diff options
| author | Milan Broz <mbroz@redhat.com> | 2007-07-21 04:37:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-21 17:49:14 -0700 |
| commit | 80b16c192e469541263d6bfd9177662ceb632ecc (patch) | |
| tree | c6e8a0abc281eac6e8139b38c4152dc366693f13 | |
| parent | d3fec424b23c47686efcf3f2004c3f1c1cee4d9c (diff) | |
dm io: fix panic on large request
Flush workqueue before releasing bioset and mopools in dm-crypt. There can
be finished but not yet released request.
Call chain causing oops:
run workqueue
dec_pending
bio_endio(...);
<remove device request - remove mempool>
mempool_free(io, cc->io_pool);
This usually happens when cryptsetup create temporary
luks mapping in the beggining of crypt device activation.
When dm-core calls destructor crypt_dtr, no new request
are possible.
Signed-off-by: Milan Broz <mbroz@redhat.com>
Cc: Chuck Ebbert <cebbert@redhat.com>
Cc: Patrick McHardy <kaber@trash.net>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Cc: Christophe Saout <christophe@saout.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/md/dm-crypt.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index ba952a03259..bdc52d6922b 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -920,6 +920,8 @@ static void crypt_dtr(struct dm_target *ti) { struct crypt_config *cc = (struct crypt_config *) ti->private; + flush_workqueue(_kcryptd_workqueue); + bioset_free(cc->bs); mempool_destroy(cc->page_pool); mempool_destroy(cc->io_pool); |