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authorMilan Broz <mbroz@redhat.com>2007-07-21 04:37:27 -0700
committerWilly Tarreau <w@1wt.eu>2007-08-25 17:24:08 +0200
commit04745f208c5b7de16fb35628b0003744b760b2cd (patch)
tree335a4c02780dc862a8e481355af3ca81cbdd7cdc
parent32419ed8545cf3becdc84cfee0efd62becb48b4d (diff)
[PATCH] 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Willy Tarreau <w@1wt.eu>
-rw-r--r--drivers/md/dm-crypt.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index b9ff4e368aad..6b50991623ef 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -917,6 +917,8 @@ 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);