Re: Xen 33 panic while shutting down HVM guest

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

On 28.06.11 20:28, Hugo Silva wrote:
> Just caught this one on the dom0 serial console before rebooting:
> 
> tap0: detached
> tap1: detached
> xbd backend: detach device dm0m for domain 9
> xbd backend: detach device dm0n for domain 9
> uvm_fault(0xffffffff80622de0, 0x0, 1) -> e

This is a NULL pointer dereference in the NetBSD Dom0 kernel.

> fatal page fault in supervisor mode
> trap type 6 code 0 rip ffffffff80217ff6 cs e030 rflags 10287 cr2  10 cpl
> 8 rsp ffffa0003c062af0
> panic: trap
> cpu0: Begin traceback...
> ?() at ffffa0003c062a00
> ?() at 8
> ?() at ffffa0003437f940
> uvm_vnodeops() at netbsd:_prop_stack_push+0x5cafb
> uvm_fault(0xffffffff805fca60, 0xfffffffffffff000, 1) -> e
> fatal page fault in supervisor mode
> trap type 6 code 0 rip ffffffff8014bdc7 cs e030 rflags 10246 cr2
> fffffffffffffffa cpl 8 rsp ffffa0003c062040
> Skipping crash dump on recursive panic
> panic: trap
> Faulted in mid-traceback; aborting...rebooting...
> (XEN) Domain 0 shutdown: rebooting machine.
> 
> 
> The machine had been up for days and survived a lot of vm
> create/destroy.. did nothing different (xm shutdown $vm).