On Tue, Jul 25, 2017 at 03:24:08PM -0700, Shaohua Li wrote:

Disable CONIFG_SMP, kernel crashes at boot time, here is the log.

I can reproduce the issue.  Unfortunately the addresss in the bug
doesn't make any sense to me when resolving it using gdb, as t just
points to the line where blk_mq_init_queue calls
blk_alloc_queue_node.

Can you check if you get better results in your build?