[libvirt] python binding: openAuth() segfaulting
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.
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. Matthias
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
participants (2)
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Dan Kenigsberg -
Matthias Bolte