[PATCH v4 2/9] bus: verify bus name on registration

@@ -47,6 +47,8 @@ rte_bus_register(struct rte_bus *bus)
 {
 	RTE_VERIFY(bus);
 	RTE_VERIFY(bus->name && strlen(bus->name));
+	/* Its whole name should be comprised only of valid characters */
+	RTE_VERIFY(rte_bus_name_valid(bus->name) == strlen(bus->name));
 	/* A bus should mandatorily have the scan implemented */
 	RTE_VERIFY(bus->scan);
 	RTE_VERIFY(bus->probe);

@@ -207,3 +209,14 @@ rte_bus_find_device(const struct rte_device *start,
 	}
 	return dev;
 }
+
+/* Validate a bus name. */
+size_t
+rte_bus_name_valid(const char *name)
+{
+	size_t i = 0;
+
+	while (isalnum(name[i]) || name[i] == '_')
+		i++;
+	return i;
+}

@@ -338,4 +338,20 @@ int rte_eal_hugepage_attach(void);
  */
 bool rte_eal_using_phys_addrs(void);
 
+/*
+ * Validate a bus name.
+ *
+ * Counts the number of valid characters in a given name,
+ * starting from the beginning.
+ * A legal bus name is defined by the pattern:
+ *   [:alnum:_]+
+ *
+ * @param name
+ *	bus name
+ *
+ * @return
+ *	number of valid characters in name.
+ */
+size_t rte_bus_name_valid(const char *name);
+
 #endif /* _EAL_PRIVATE_H_ */