From: pageexec@freemail.hu
To: Antoine Martin <antoine@nagafix.co.uk>, Avi Kivity <avi@redhat.com>
Cc: kvm@vger.kernel.org
Subject: Re: guest patched with pax causes "set_cr0: 0xffff88000[...] #GP, reserved bits 0x8004003?" flood on host
Date: Thu, 11 Mar 2010 11:31:17 +0200 [thread overview]
Message-ID: <4B98C675.22780.5AAA17C0@pageexec.freemail.hu> (raw)
In-Reply-To: <4B989162.4080008@redhat.com>
On 11 Mar 2010 at 8:44, Avi Kivity wrote:
> On 03/10/2010 06:17 PM, Antoine Martin wrote:
> > Hi,
> >
> > I've updated my host kernel headers to 2.6.33, rebuilt glibc (and the
> > base system), rebuilt kvm.
> > ... and now I get hundreds of those in dmesg on the host when I start
> > a guest kernel that worked fine before. (2.6.33 + pax patch v5)
> > set_cr0: 0xffff88000ec29d58 #GP, reserved bits 0x80040033
> > set_cr0: 0xffff88000f3cdb38 #GP, reserved bits 0x8004003b
> > set_cr0: 0xffff88000f3dbc88 #GP, reserved bits 0x80040033
> > set_cr0: 0xffff88000f83b958 #GP, reserved bits 0x8004003b
>
> The guest is clearly confused. Can you bisect kvm to find out what
> introduced this problem?
the guest is calling pax_{open,close}_kernel that flip cr0.wp off/on,
respectively. Antoine, can you decode some of those rip values please
(or better, send me the corresponding vmlinux and all logs)?
next prev parent reply other threads:[~2010-03-11 11:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-10 16:17 guest patched with pax causes "set_cr0: 0xffff88000[...] #GP, reserved bits 0x8004003?" flood on host Antoine Martin
2010-03-11 6:44 ` Avi Kivity
2010-03-11 9:31 ` pageexec [this message]
2010-03-11 11:05 ` Antoine Martin
2010-03-11 11:10 ` pageexec
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4B98C675.22780.5AAA17C0@pageexec.freemail.hu \
--to=pageexec@freemail.hu \
--cc=antoine@nagafix.co.uk \
--cc=avi@redhat.com \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox