qemu: Check if virQEMUCapsNewCopy(...) has failed

Check if virQEMUCapsNewCopy(...) has failed, thus a segmentation fault
in virQEMUCapsFilterByMachineType(...) will be avoided.

Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 3247d2567599115b1e0f74bfd262bbca88d75fb6..399e3144762b33a595f1440b96a5b24b8fdf7ade 100644 (file)
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -4928,6 +4928,10 @@ virQEMUCapsCacheLookupCopy(virCapsPtr caps,
 
     ret = virQEMUCapsNewCopy(qemuCaps);
     virObjectUnref(qemuCaps);
+
+    if (!ret)
+        return NULL;
+
     virQEMUCapsFilterByMachineType(ret, machineType);
     return ret;
 }