libvirt/libvirt-0.7.1-fix-cgroup-crash.patch

diff -rup libvirt-0.7.1/src/qemu_driver.c new/src/qemu_driver.c
--- libvirt-0.7.1/src/qemu_driver.c	2010-06-03 13:51:14.398483000 -0400
+++ new/src/qemu_driver.c	2010-06-03 13:56:05.667092000 -0400
@@ -5988,7 +5988,7 @@ static int qemudDomainAttachDevice(virDo
                              virDomainDiskDeviceTypeToString(dev->data.disk->device));
             /* Fallthrough */
         }
-        if (ret != 0) {
+        if (ret != 0 && cgroup) {
             virCgroupDenyDevicePath(cgroup,
                                     dev->data.disk->src);
         }