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Date: Thu, 05 Jan 2012 12:05:52 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: [Qemu-devel] vhost broken?
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To: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Avi Kivity <avi@redhat.com>

  Hi,

current master seems to corrupt guest memory, I get guest errors like
this one:

swap_dup: Bad swap file entry 1999800080
BUG: Bad page map in process udevd  pte:bec5f30054520100 pmd:1f6f4067
addr:00007fc464a02000 vm_flags:00100073 anon_vma:ffff88001f928ec0
mapping:(null) index:7fc464a02
Pid: 555, comm: udevd Not tainted 2.6.32-220.el6.x86_64 #1

bisecting points to this commit:

commit 04097f7c5957273c578f72b9bd603ba6b1d69e33
Author: Avi Kivity <avi@redhat.com>
Date:   Sun Dec 18 14:06:05 2011 +0200

    vhost: convert to MemoryListener API

cheers,
  Gerd