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A patch for this has been pushed to the upstream repo:
commit 41064facd48676bb311784f29619c1fbd0aed8c4
Author: Stefan Berger <stefanb.ibm.com>
Date: Wed Mar 12 10:35:13 2014 -0400
nwfilter: Add missing goto err_exit in error path
https://bugzilla.redhat.com/show_bug.cgi?id=1071095
Add a missing goto err_exit in the error path where an unsupported
value is assigned to the CTRL_IP_LEARNING key.
Signed-off-by: Stefan Berger <stefanb.ibm.com>
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHSA-2015-0323.html
Description of problem: Libvirt report incorrect error message when parsing invalid value of CTRL_IP_LEARNING in nwfilter Version-Release number of selected component (if applicable): libvirt-1.1.1-25.el7.x86_64 qemu-kvm-rhev-1.5.3-50.el7.x86_64 kernel-3.10.0-97.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. Set invalid value to CTRL_IP_LEARNING, Valid values are any, dhcp, or none. [root@intel-e5530-8-2 ~]# virsh dumpxml r7 | grep interface -A8 <interface type='network'> <mac address='52:54:00:7f:44:cb'/> <source network='default'/> <model type='rtl8139'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='jiahu'/> </filterref> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> ... 2. Start the domain. [root@intel-e5530-8-2 ~]# virsh start r7 error: Failed to start domain r7 error: internal error: Could not find value for variable 'IP' Actual results: As shown above, after checking the codes, lack of "goto err_exit;" after the "virReportError" sentence in virNWFilterInstantiate function in nwfilter/nwfilter_gentech_driver.c 710 } else { 711 rc = -1; 712 virReportError(VIR_ERR_PARSE_FAILED, 713 _("filter '%s' " 714 "learning value '%s' invalid."), 715 filter->name, learning); 716 } 717 } else Expected results: Rebuild libvirt with "goto err_exit;" line after src/nwfilter/nwfilter_gentech_driver.c:715， below message is expected results. [root@intel-3323-24-1 src]# rpm -q libvirt libvirt-1.1.1-25.el7_jiahu_testing.x86_64 [root@intel-3323-24-1 src]# [root@intel-3323-24-1 src]# virsh dumpxml mig1| grep interface -A8 <interface type='network'> <mac address='52:54:00:b7:e7:d8'/> <source network='default'/> <model type='rtl8139'/> <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='jiahu'/> </filterref> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> ... [root@intel-3323-24-1 src]# virsh start mig1 error: Failed to start domain mig1 error: failed to parse configuration file filter 'clean-traffic' learning value 'jiahu' invalid.