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Tahsin Erdogan authored
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>
d09960b0