Updated bug description with SRU template and test case so that the
testcase can be updated as need be.
** Description changed:
+ [Impact]
+
+ * Libvirt migrations using tunnelled libvirt cause a failure to migrate
+ on the destination with error VQ 2 size 0x80 < last_avail_idx 0x9 -
+ used_idx 0xa
+
+ * TBD: justification for backporting the fix to the stable release.
+ * TBD: In addition, it is helpful, but not required, to include an
+ explanation of how the upload fixes this bug.
+
+ [Test Case]
+ 1. Create a VM on shared storage solution. In my case NFS.
+ 2. set start_libvirtd="yes" in /etc/default/libvirt-bin
+ 3. systemctl restart libvirt-bin
+ 4. virsh dommemstat 1 <vm>
+ 4. virsh -c qemu+ssh://${FROM}/system migrate --live --p2p --tunnelled ${VM}
qemu+tcp://ubuntu@${TO}/system
+ 5. Repeat until failure to migrate, then check /var/log/libvirt/qemu/<vm>.log
for error from above.
+
+ * Yes --live, --p2p, and --tunnelled are all required to reproduce
+ afaik.
+
+ [Regression Potential]
+ TBD
+ * discussion of how regressions are most likely to manifest as a result of
this change.
+ * It is assumed that any SRU candidate patch is well-tested before
+ upload and has a low overall risk of regression, but it's important
+ to make the effort to think about what ''could'' happen in the
+ event of a regression.
+ * This both shows the SRU team that the risks have been considered,
+ and provides guidance to testers in regression-testing the SRU.
+
+ [Other Info]
+ TBD
+ * Anything else you think is useful to include
+ * Anticipate questions from users, SRU, +1 maintenance, security teams and
the Technical Board
+ * and address these questions in advance
+
+
+ ___________________ Original Description follows _____________________
+
See updates at the end of #1612089. Sample error message:
Dec 05 14:41:07 zbk130713 libvirtd[29690]: internal error: early end of file
from monitor, possible problem:
2016-12-05T14:41:07.903932Z qemu-system-x86_64: VQ 2 size 0x80 <
last_avail_idx 0x9 - used_idx 0xa
2016-12-05T14:41:07.903981Z qemu-system-x86_64: error while loading state for
instance 0x0 of device '0000:00:05.0/virtio-balloon'
2016-12-05T14:41:07.905180Z qemu-system-x86_64: load of migration failed:
Operation not permitted
Seems related to this patch series:
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg03079.html
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https://bugs.launchpad.net/bugs/1647389
Title:
Regression: Live migrations can still crash after CVE-2016-5403 fix
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