Re: [Xen-devel] 4.11.0 RC1 panic

[Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>]

On Tue, Jun 12, 2018 at 04:54:30PM +0100, Andrew Cooper wrote:
> On 12/06/18 16:38, Manuel Bouyer wrote:
> > On Tue, Jun 12, 2018 at 01:39:05PM +0200, Manuel Bouyer wrote:
> >> I applied this patch to 4.11rc4 (let's not change too much things at the
> >> same time) and rebooted my test host. Hopefully I'll have some data to 
> >> report
> >> soon
> > Got the first panic (still from a i386 domU):
> > login: (XEN) d4v0 Hit #DB in Xen context: e008:ffff82d08036eb00 [overflow], 
> > stk 0000:ffff8301bf117f78, dr6 ffff0ff0
> > (XEN) d4v0 Hit #DB in Xen context: e008:ffff82d08036eb00 [overflow], stk 
> > 0000:ffff8301bf117f78, dr6 ffff0ff0
> > (XEN) d4v0 Hit #DB in Xen context: e008:ffff82d08036eb00 [overflow], stk 
> > 0000:ffff8301bf117f78, dr6 ffff0ff0
> > (XEN) d4v0 Hit #DB in Xen context: e008:ffff82d08036eb00 [overflow], stk 
> > 0000:ffff8301bf117f78, dr6 ffff0ff0
> > (XEN) d4v0 Hit #DB in Xen context: e008:ffff82d08036eb00 [overflow], stk 
> > 0000:ffff8301bf117f78, dr6 ffff0ff0
> > (XEN) d4v2 Hit #DB in Xen context: e008:ffff82d08036eb00 [overflow], stk 
> > 0000:ffff8301bf077f78, dr6 ffff0ff0
> 
> I presume you're running a XSA-263 (MovSS) exploit in testing?

Not intentionally, these are the NetBSD test suite and I don't think any
specifically targets this (there are 759 tests at this time).
But these includes network tests, so there is probably in kernel bpf code tests.

-- 
Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>
     NetBSD: 26 ans d'experience feront toujours la difference
--

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