From: Milan Broz Date: Sat, 21 Jul 2007 11:37:27 +0000 (-0700) Subject: dm io: fix panic on large request X-Git-Tag: v2.6.23-rc1~184 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=80b16c192e469541263d6bfd9177662ceb632ecc;p=~shefty%2Frdma-dev.git 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(...); 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 Cc: Chuck Ebbert Cc: Patrick McHardy Acked-by: Alasdair G Kergon Cc: Christophe Saout Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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);