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| H A D | dm.c | diff d09960b0032174eb493c4c13be5b9c9ef36dc9a7 Mon Oct 10 07:35:19 CDT 2016 Tahsin Erdogan <tahsin@google.com> 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>
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