Re: -current dom0 crash

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Feb 01, 2012 at 01:22:24PM -0800, Jeff Rizzo wrote:
> I just updated one of my dom0s from 5.99.59 to 5.99.63, and got this
> crash when destroying a hung domU (an operation that worked fine
> under 5.99.59):
> 
> Feb  1 13:20:02 xenserver1 xenbackendd[335]: Failed to read
> /local/domain/0/backend/console/2/0/script (No such file or
> directory)
> xbd backend: detach device mirror-wintermu for domain 2
> fatal protection fault in supervisor mode
> trap type 4 code 0 rip ffffffff804f7425 cs e030 rflags 10286 cr2
> ffffa000117db7dc cpl 6 rsp ffffa00000a5f880
> kernel: protection fault trap, code=0
> Stopped in pid 0.31 (system) at netbsd:nd6_purge+0xb5:  movl
> 14(%r12),%eax
> nd6_purge() at netbsd:nd6_purge+0xb5
> in6_ifdetach() at netbsd:in6_ifdetach+0x21
> udp6_usrreq() at netbsd:udp6_usrreq+0x208
> if_detach() at netbsd:if_detach+0x112
> xennetback_xenbus_destroy() at netbsd:xennetback_xenbus_destroy+0x8b
> otherend_changed() at netbsd:otherend_changed+0xaf
> xenwatch_thread() at netbsd:xenwatch_thread+0xa2

It looks like an issue in the ipv6 code on interface destroy (it may be
a race condition), so it may not be xen-specific.
Anyone remembers inet6 or if_detach() related changes recently ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--