Silence an UBSAN fuzzing fault

2020-01-01 17:41:43 +01:00
parent 9038988a48
commit 6fe5ea40aa
1 changed files with 4 additions and 1 deletions
@@ -167,7 +167,10 @@ static inline size_t formatClosePayload(char *dst, uint16_t code, const char *me
    if (code) {
        code = cond_byte_swap<uint16_t>(code);
        memcpy(dst, &code, 2);
-        memcpy(dst + 2, message, length);
+        /* It is invalid to pass nullptr to memcpy, even though length is 0 */
+        if (message) {
+            memcpy(dst + 2, message, length);
+        }
        return length + 2;
    }
    return 0;