common: event: check event_type_name() argument

In event_type_name() we should avoid possible buffer overruns by checking
the type argument.

Addresses-Coverity-ID: 478862 Out-of-bounds access
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

diff --git a/common/event.c b/common/event.c
index dc61b96..16c2ba6 100644 (file)
--- a/common/event.c
+++ b/common/event.c
@@ -56,7 +56,10 @@ _Static_assert(ARRAY_SIZE(type_name) == EVT_COUNT, "event type_name size");
 const char *event_type_name(enum event_t type)
 {
 #if CONFIG_IS_ENABLED(EVENT_DEBUG)
-       return type_name[type];
+       if (type < ARRAY_SIZE(type_name))
+               return type_name[type];
+       else
+               return "(unknown)";
 #else
        return "(unknown)";
 #endif