The patch titled
dm io: fix panic on large request
has been added to the -mm tree. Its filename is
dm-io-fix-panic-on-large-request.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: dm io: fix panic on large request
From: Milan Broz <mbroz@xxxxxxxxxx>
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@xxxxxxxxxx>
Cc: Chuck Ebbert <cebbert@xxxxxxxxxx>
Cc: Patrick McHardy <kaber@xxxxxxxxx>
Cc: Alasdair G Kergon <agk@xxxxxxxxxx>
Cc: Christophe Saout <christophe@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-crypt.c | 2 ++
1 files changed, 2 insertions(+)
diff -puN drivers/md/dm-crypt.c~dm-io-fix-panic-on-large-request drivers/md/dm-crypt.c
--- a/drivers/md/dm-crypt.c~dm-io-fix-panic-on-large-request
+++ a/drivers/md/dm-crypt.c
@@ -922,6 +922,8 @@ static void crypt_dtr(struct dm_target *
{
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);
_
Patches currently in -mm which might be from mbroz@xxxxxxxxxx are
origin.patch
dm-io-fix-panic-on-large-request.patch
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