On Thu, 2018-02-08 at 09:40 -0800, tj@xxxxxxxxxx wrote: > Heh, sorry about not being clear. What I'm trying to say is that > scmd->device != NULL && device->host == NULL. Or was this what you > were saying all along? What I agree with is that the request pointer (req argument) is stored in %rdi and that mov 0x1b0(%rdi),%rax loads scmd->device into %rax. Since RIP == scsi_times_out+0x17, since the instruction at that address tries to dereference %rax and since the register dump shows that %rax == NULL I think that means that scmd->device == NULL. Thanks, Bart.