Check to make sure extension name is provided

Fixes a null pointer dereference that occurs if an extension is
provided without a name

diff --git a/palacios/src/palacios/vmm_config.c b/palacios/src/palacios/vmm_config.c
index ea772ce..9125d2e 100644 (file)
--- a/palacios/src/palacios/vmm_config.c
+++ b/palacios/src/palacios/vmm_config.c
@@ -607,6 +607,11 @@ static int setup_extensions(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
     while (extension) {
        char * ext_name = v3_cfg_val(extension, "name");
 
+        if (!ext_name) {
+            PrintError("Extension has no name\n");
+            return -1;
+        }
+
        V3_Print("Configuring extension %s\n", ext_name);
 
        if (v3_add_extension(vm, ext_name, extension) == -1) {