when I analyze the crash dump file(/proc/vmcore), crash utility show I insert a module which would trigger a kernel crash, in this module I use request_irq（irq, myinterrupt, ...）to register a irq on the nic, and in the function myinterrupt I just write something at somewhere (int *p = 00202020; *p = 10), the kernel would crash soon , but I cann't open the /proc/vmcore with crash utility after warm reboot, the error look like: --> crash: invalid kernel virtual address: 5fb001 type: "pgd page"