modinfo: skip parm entries without a name

Specially crafted/corrupt modules may have a parm/parmtype entry which
lacks the "name:" prefix. Throw a warning and skip such entries.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: #451
Signed-off-by: Lucas De Marchi <demarchi@kernel.org>

Author: evelikov

tools/modinfo.c

@@ -88,6 +88,11 @@ static int process_parm(const char *key, const char *value, struct param **param
 		return 0;
 	}
 
+	if (colon == value) {
+		ERR("Missing param name in value \"%s\"\n", value);
+		return 0;
+	}
+
 	name = value;
 	namelen = colon - value;
 	if (streq(key, "parm")) {