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(parent: b052b07) | patch
dm: free io_barrier after blk_cleanup_queue call
authorTahsin Erdogan <tahsin@google.com>
Mon, 10 Oct 2016 12:35:19 +0000 (05:35 -0700)
committerMike Snitzer <snitzer@redhat.com>
Tue, 18 Oct 2016 16:02:08 +0000 (12:02 -0400)
commitd09960b0032174eb493c4c13be5b9c9ef36dc9a7
tree1dfe65031f7b8b7316806e9abc4eb69f3244295atree | snapshot (tar.gz zip)
parentb052b07c39d593c9954a84d5bbe1563999483f38commit | diff
dm: free io_barrier after blk_cleanup_queue call

dm_old_request_fn() has paths that access md->io_barrier.  The party
destroying io_barrier should ensure that no future execution of
dm_old_request_fn() is possible.  Move io_barrier destruction to below
blk_cleanup_queue() to ensure this and avoid a NULL pointer crash during
request-based DM device shutdown.

Cc: stable@vger.kernel.org # 4.3+
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
drivers/md/dm.c diff | blob | blame | history