[libvirt] [Libvirt] segfault with patch "libxl: fix framebuffer port setting for HVM domains"

[Ján Tomko]

On 08/25/2014 01:39 AM, Chris wrote:
> Hello,
> 
> I encountered segfaults with libvirt + libxl with this specific patch :
> http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=b55cc5f4e31b488c4f9c3c8470c992c1f8f5d09c
> 
> My Libvirt/Xen environment (on a slackware64-14.1) :
> 
> virsh # version
> Compiled against library: libvirt 1.2.6
> Using library: libvirt 1.2.6
> Using API: Xen 1.2.6
> Running hypervisor: Xen 4.4.0
> 

> 
> The VM starts fine with "virsh start" (cf attached libxl log), the VNC process is listening as requested on 0.0.0.0 but whenever I open a new virsh cli and send a command (e.g. "list"), libvirtd segfaults. I attached a gdb trace to this mail.
> If I rebuild libvirt without the patch mentioned earlier, no more segfaults, but of course the VNC process is listening on 127.0.0.1 instead of requested 0.0.0.0 when I start the VM.
> 

The trace shows SIGSEGV in malloc_consolidate, which usually means we touched
some memory we shouldn't have and overwritten malloc's internal data.

Could you run libvirtd under valgrind and see if it shows any invalid
reads/writes?

Jan

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: OpenPGP digital signature
URL: <http://listman.redhat.com/archives/libvir-list/attachments/20140825/9193c5cf/attachment-0001.sig>