[PATCH] util: Prevent a NULl pointer from being accessed

[Yi Wang]

From: Huang Zijiang <huang.ziji...@zte.com.cn>

virJSONValueObjectGetObject maybe return NULL if the key is
missing or if value is not the correct TYPE, so we have to prevent
a NULl pointer from being accessed.

Signed-off-by: Huang Zijiang <huang.ziji...@zte.com.cn>
Signed-off-by: Yi Wang <wang.y...@zte.com.cn>
---
 src/util/virqemu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/util/virqemu.c b/src/util/virqemu.c
index f3a233a..29fbe4e 100644
--- a/src/util/virqemu.c
+++ b/src/util/virqemu.c
@@ -257,6 +257,11 @@ virQEMUBuildObjectCommandlineFromJSON(virBufferPtr buf,
     const char *type = virJSONValueObjectGetString(objprops, "qom-type");
     const char *alias = virJSONValueObjectGetString(objprops, "id");
     virJSONValuePtr props = virJSONValueObjectGetObject(objprops, "props");
+    if (!props) {
+        virReportError(VIR_ERR_INVALID_ARG, "%s",
+                       _("reply was missing return props data"));
+        return -1;
+    }
 
     return virQEMUBuildObjectCommandlineFromJSONInternal(buf, type, alias, 
props);
 }
-- 
1.9.1