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Date: Wed, 26 Aug 2009 18:50:41 +0100
From: Chris Webb <chris@arachsys.com>
Subject: Re: [Qemu-devel] [GIT PULL] 0.10.7 stable release
Message-ID: <20090826175041.GA2221@arachsys.com>
References: <1251291946-25821-1-git-send-email-glommer@redhat.com>
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To: Glauber Costa <glommer@redhat.com>
Cc: aliguori@us.ibm.com, qemu-devel@nongnu.org

Glauber Costa <glommer@redhat.com> writes:

> These are the patches I am proposing for 0.10.7 stable release. If you disagree
> with any of them, or think a patch should go in that is not in this list, let me know

I have seen a large number of failures of production qemu-kvm virtual
machines with segfaults in the VNC code. (Thread rooted at
<20090812150159.GW5348@arachsys.com>.)

Avi pointed out Gerd's patch 198a00:

  http://git.qemu.org/qemu.git/commit/?id=198a0039c5fca224a77e9761e2350dd9cc102ad0

which I backported <20090819224739.GB17276@arachsys.com>:

  http://lists.gnu.org/archive/html/qemu-devel/2009-08/msg00949.html

This has massively reduced the crash rate of qemu-kvm processes across our
clusters, although I still do a see a (much rarer) vnc-related segfault in
vnc_framebuffer_update().

Although these use-after-free problems were seen in qemu-kvm, the code (and
patch) are identical in standard qemu so I'd strongly recommend this
backport of Gerd's patch for qemu-stable 0.10.7.

Best wishes,

Chris.