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Re: [libvirt] python binding: openAuth() segfaulting



On Tue, Mar 16, 2010 at 05:50:42PM +0100, Matthias Bolte wrote:
> 2010/3/16 Dan Kenigsberg <danken redhat com>:
> > I was trying to learn how to use openAuth(uri, auth_cb, flags), and
> > got:
> >
> > Python 2.6.2 (r262:71600, Jan 25 2010, 18:46:47)
> > [GCC 4.4.2 20091222 (Red Hat 4.4.2-20)] on linux2
> > Type "help", "copyright", "credits" or "license" for more information.
> >>>> import libvirt
> >>>> libvirt.openAuth('qemu:///system', lambda x: None, 0)
> > Segmentation fault (core dumped)
> >
> > I guess my lambda expression was not what libvirt expected, but still..
> >
> > Regards,
> >
> > Dan.
> >
> 
> Yes, the python bindings lack proper input validation. If you pass
> something unexpected it'll probably segfault.
> 
> I've started working on a patch that adds input validation to the
> python bindings.
> 
> Until then, see examples/python/esxlist.py in the libvirt codebase for
> the correct usage of the auth parameter in python.

Thanks.

Since I'm using qemu and trying sasl over unix domain, I've changed
    uri = "qemu:///system"
and tried esxlist.py out (on Fedora 12, libvirt-0.7.2-1.fc12.x86_64).

I've got the following in /var/log/messages. Any guesses what went wrong?

Mar 21 18:47:01 myhost python: Bad IPLOCALPORT value
Mar 21 18:47:01 myhost python: abrt: detected unhandled Python exception in /tmp/esxlist.py
Mar 21 18:47:01 myhost abrtd: Directory 'pyhook-1269190021-25439' creation detected
Mar 21 18:47:01 myhost abrtd: Executable '/tmp/esxlist.py' doesn't belong to any package
Mar 21 18:47:01 myhost abrtd: Corrupted or bad crash /var/cache/abrt/pyhook-1269190021-25439 (res
:4), deleting
Mar 21 18:47:01 myhost abrt[25443]: saved python crash dump of pid 25439 to /var/cache/abrt/pyhoo
k-1269190021-25439.new


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