libvirtd[2349]: segfault at 0 ip (null) sp 00007ffd9a762a98 error 14 in libvirtd[55890dd57000+76000]

[Stefan Bader]

This happened while I was restoring a Xen HVM guest from a save file. Cannot say whether this was a one off or not but since there is a dump might be worth to file a bug as a reminder

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: libvirt-daemon 1.3.4-1ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-23.41-generic 4.4.10
Uname: Linux 4.4.0-23-generic x86_64
ApportVersion: 2.20.1-0ubuntu4
Architecture: amd64
Date: Fri Jun 3 13:53:48 2016
ExecutablePath: /usr/sbin/libvirtd
ProcAttrCurrent: /usr/sbin/libvirtd (enforce)
ProcCmdline: placeholder root=UUID=7f19c652-dc82-44e0-b8aa-b9d712205617 ro video=640x480 loglevel=10 earlyprintk=xenboot console=tty0 console=hvc0
ProcEnviron: PATH=(custom, no user)
SegvAnalysis: Skipped: missing required field "Disassembly"
Signal: 11
SourcePackage: libvirt
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceSource:
 #0 0x0000000000000000 in ?? ()
 #1 0x00007fd15f065310 in helper_stdout_readable (egc=0x7ffd9a762b50, ev=0x0, fd=-3, events=0, revents=0) at libxl_save_callout.c:259
   [Error: libxl_save_callout.c was not found in source tree]
 #2 0x0000000000000000 in ?? ()
StacktraceTop:
 ?? ()
 helper_stdout_readable (egc=0x7ffd9a762b50, ev=0x0, fd=-3, events=0, revents=0) at libxl_save_callout.c:259
 ?? ()

[Apport retracing service (apport)]

Thank you for your report!

However, processing it in order to get sufficient information for the
developers failed (it does not generate a useful symbolic stack trace). This
might be caused by some outdated packages which were installed on your system
at the time of the report:

no debug symbol package found for libiscsi2
no debug symbol package found for sed
libxen-4.6 version 4.6.0-1ubuntu5 required, but 4.6.0-1ubuntu4 is available
libxenstore3.0 version 4.6.0-1ubuntu5 required, but 4.6.0-1ubuntu4 is available
no debug symbol package found for libbrlapi0.6
no debug symbol package found for libflac8
no debug symbol package found for xdg-user-dirs
no debug symbol package found for debianutils
no debug symbol package found for qemu-kvm
no debug symbol package found for perl-base
no debug symbol package found for cpu-checker
libxen-4.6 version 4.6.0-1ubuntu5 required, but 4.6.0-1ubuntu4 is available
libxenstore3.0 version 4.6.0-1ubuntu5 required, but 4.6.0-1ubuntu4 is available

Please upgrade your system to the latest package versions. If you still
encounter the crash, please file a new report.

Thank you for your understanding, and sorry for the inconvenience!

[Stefan Bader (smb)]

Note to self to check out:
f9edcfa libxl: support migration stream V2 in migration
5325123 libxl: support Xen migration stream V2 in save/restore
fccf272 libxl: switch to using libxl_domain_create_restore from v4.4 API

[Launchpad Janitor (janitor)]

This bug was fixed in the package libvirt - 1.3.4-1ubuntu6

---------------
libvirt (1.3.4-1ubuntu6) yakkety; urgency=low

  * Fix libvirtd crashing on libxl domain restore (LP: #1588841).
    Patches cherry-picked from upsream libvirt git tree.
    - libxl: switch to using libxl_domain_create_restore from v4.4 API
    - libxl: support Xen migration stream V2 in save/restore
    - libxl: support migration stream V2 in migration

 -- Stefan Bader <email address hidden> Wed, 08 Jun 2016 14:17:23 +0200