From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 2 Feb 2017 17:35:00 +0000 (+0100)
Subject: time-util: add overflow checking to monotonic timestamp specifications
X-Git-Tag: v233.3~77
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=a61ff8a1eea921800d6225ff137b24e0a0fb60e1;ds=sidebyside

time-util: add overflow checking to monotonic timestamp specifications
---

diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index 265f5995a..6a76b6551 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -857,6 +857,8 @@ from_tm:
                 return -EINVAL;
 
 finish:
+        if (ret + plus < ret) /* overflow? */
+                return -EINVAL;
         ret += plus;
         if (ret > USEC_TIMESTAMP_FORMATTABLE_MAX)
                 return -EINVAL;