target crash / host hang with nvme-all.3 branch of nvme-fabrics

[Steve Wise]

> On Thu, Jun 16, 2016 at 09:53:45AM -0500, Steve Wise wrote:
> > [11436.603807] nvmet: ctrl 1 keep-alive timer (15 seconds) expired!
> > [11436.609866] BUG: unable to handle kernel NULL pointer dereference at
> > 0000000000000050
> > [11436.617764] IP: [<ffffffffa09c6dff>] nvmet_rdma_delete_ctrl+0x6f/0x100
> 
> Can you check using gdb where in the code this is?


nvmet_rdma_delete_ctrl():
/root/nvmef/nvme-fabrics/drivers/nvme/target/rdma.c:1302
                        &nvmet_rdma_queue_list, queue_list) {
                if (queue->nvme_sq.ctrl->cntlid == ctrl->cntlid)
     df6:       48 8b 40 38             mov    0x38(%rax),%rax
     dfa:       41 0f b7 4d 50          movzwl 0x50(%r13),%ecx
     dff:       66 39 48 50             cmp    %cx,0x50(%rax)      <===========
here
     e03:       75 cd                   jne    dd2 <nvmet_rdma_delete_ctrl+0x42>