time-util: add overflow checking to monotonic timestamp specifications

2017-02-02 20:12:32 +01:00
parent 74c5b33b0a
commit 315782db14
1 changed files with 2 additions and 0 deletions
@@ -844,6 +844,8 @@ from_tm:
                return -EINVAL;

 finish:
+        if (ret + plus < ret) /* overflow? */
+                return -EINVAL;
        ret += plus;
        if (ret > USEC_TIMESTAMP_FORMATTABLE_MAX)
                return -EINVAL;