libvirtd apparmor profile prevents Xen domains from starting

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Environment

SUSE Linux Enterprise Server 12

Situation

After upgrading libvirt packages on sles 12 virtual guests fail to start:

# virsh create sles12.xml
error: Failed to create domain from sles12.xml
error: internal error: libxenlight failed to create new domain 'sles12'


# cat /var/log/libvirt/libxl/sles12.log:
libxl: debug: libxl_create.c:1362:do_domain_create: ao 0x7fae94005070: create: how=(nil) callback=(nil) poller=0x7fae940008c0
xc: error: xc_alloc_hypercall_buffer: mmap failed (11 = Resource temporarily unavailabl): Internal error
libxl: error: libxl.c:570:libxl_list_domain: geting domain info list: Resource temporarily unavailable
libxl: error: libxl.c:314:libxl__domain_rename: unexpected errorchecking for existing domain
libxl: error: libxl_create.c:762:initiate_domain_create: cannot make domain: -5
libxl: debug: libxl_event.c:1591:libxl__ao_complete: ao 0x7fae94005070: complete, rc=-3
libxl: debug: libxl_create.c:1376:do_domain_create: ao 0x7fae94005070: inprogress: poller=0x7fae940008c0, flags=ic
libxl: debug: libxl_event.c:1563:libxl__ao__destroy: ao 0x7fae94005070: destroy
xc: debug: hypercall buffer: total allocations:17 total releases:16
xc: debug: hypercall buffer: current allocations:1 maximum allocations:3
xc: debug: hypercall buffer: cache current size:2
xc: debug: hypercall buffer: cache hits:14 misses:2 toobig:1

Resolution

As a workaround you can turn off apparmor chkconfig apparmor off and reboot the server.

Cause

The problem is due to a regression in the apparmor profiles for /usr/sbin/libvirtd. This regression prevents Xen from working properly.

Additional Information

Bug 913799 has been filed, and the main repositories will have a fix for this in the near future. this problem is seen in version libvirt-1.2.5-21.1

Disclaimer

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