On Tue, Apr 28, 2015 at 01:52:20PM +0200, Bart Van Assche wrote: > Hello, > > Earlier today I started testing an SRP initiator patch series on top of > Linux kernel v4.1-rc1. Although that patch series works reliably on top of > kernel v4.0, a test during which I triggered scsi_remove_host() + relogin > (for p in /sys/class/srp_remote_ports/*; do echo 1 >$p/delete & done; wait; > srp_daemon -oaec) triggered the following kernel oops: Can you try the patch below? From my cursory reading of the dm code it can have tio->clone allocated for a while before it sets up the ->q pointer for it: diff --git a/drivers/md/dm.c b/drivers/md/dm.c index f8c7ca3..ee74764 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1089,7 +1089,7 @@ static void free_rq_clone(struct request *clone) blk_rq_unprep_clone(clone); - if (clone->q->mq_ops) + if (clone->q && clone->q->mq_ops) tio->ti->type->release_clone_rq(clone); else if (!md->queue->mq_ops) /* request_fn queue stacked on request_fn queue(s) */ -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
