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Bug#604956: marked as done (CVE-2010-3698 fix crashes i386 KVM userspace with amd64 kernel)

Your message dated Fri, 10 Dec 2010 13:33:28 +0000
with message-id <1291988008.19763.36.camel@localhost>
and subject line Re: Bug#604956: linux-image-2.6.36-trunk-amd64 2.6.36-1~experimental.1 is also affected
has caused the Debian Bug report #604956,
regarding CVE-2010-3698 fix crashes i386 KVM userspace with amd64 kernel
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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604956: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=604956
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--- Begin Message ---
Package: linux-2.6
Version: 2.6.32-28
Severity: normal
Tags: patch

CVE-2010-3698 (denial of service by users with access to /dev/kvm) was
fixed upstream by commit 9581d442b9058d3699b4be568b6e5eae38a41493,
backported in stable update

Unfortunately this causes an i386 qemu-kvm to crash on an amd64 kernel.
Romain Francoise says this is fixed by upstream commits:

commit 0a77fe4c188e25917799f2356d4aa5e6d80c39a2
Author: Avi Kivity <avi@redhat.com>
Date:   Tue Oct 19 18:48:35 2010 +0200

    KVM: Correct ordering of ldt reload wrt fs/gs reload

commit c8770e7ba63bb5dd8fe5f9d251275a8fa717fb78
Author: Avi Kivity <avi@redhat.com>
Date:   Thu Nov 11 12:37:26 2010 +0200

    KVM: VMX: Fix host userspace gsbase corruption


-- System Information:
Debian Release: squeeze/sid
  APT prefers proposed-updates
  APT policy: (500, 'proposed-updates'), (500, 'unstable'), (1, 'experimental')
Architecture: i386 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

--- End Message ---
--- Begin Message ---
On Fri, 2010-12-10 at 12:40 +0100, Václav Ovsík wrote:
> Hi,
> I installed linux-image-2.6.36-trunk-amd64 version
> 2.6.36-1~experimental.1 from experimental
> and the problem is there too.
> Dec 10 10:55:16 bobek kernel: [ 1756.474167] kvm[16483]: segfault at
> ffffff8c ip 00000000f720c047 sp 00000000f684618c error 6 in
> libc-2.11.2.so[f7148000+140000]
> I'm running unstable on desktop.

Already fixed upstream in 2.6.37-rc4 which is in experimental now
(shortly to be replaced with rc5).


Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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