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qemu: fix crash when removing <filterref> from interface with update-device

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If a domain network interface that contains a <filterref> is modified
"live" using "virsh update-device --live", libvirtd would crash. This
was because the code supporting live update of an interface's
filterref was assuming that a filterref might be added or modified,
but didn't account for removing the filterref, resulting in a null
dereference of the filter name.

Introduced with commit 258fb278, which was first in libvirt v1.0.1.

This addresses https://bugzilla.redhat.com/show_bug.cgi?id=1093301

(cherry picked from commit 0eac9d1e90fc3388030c6109aeb1f4860f108054)
This commit is contained in:
Laine Stump 2014-05-01 11:40:41 +03:00
parent f4d67fdb05
commit 2c84a8f6de
1 changed files with 2 additions and 1 deletions
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3
src/qemu/qemu_hotplug.c
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@ -1382,7 +1382,8 @@ qemuDomainChangeNetFilter(virConnectPtr conn,
virDomainConfNWFilterTeardown(olddev);
if (virDomainConfNWFilterInstantiate(conn, vm->def->uuid, newdev) < 0) {
if (newdev->filter &&
virDomainConfNWFilterInstantiate(conn, vm->def->uuid, newdev) < 0) {
virErrorPtr errobj;
virReportError(VIR_ERR_OPERATION_FAILED,