[systemd-devel] [PATCH 4/6] util: fix possible integer overflows

[Michal Sekletar]

---
 src/shared/util.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/shared/util.c b/src/shared/util.c
index 2f0aba8..8da2314 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -148,6 +148,9 @@ usec_t timespec_load(const struct timespec *ts) {
             ts->tv_nsec == (long) -1)
                 return (usec_t) -1;
 
+        if (USEC_PER_SEC > ((UINT64_MAX - (ts->tv_nsec / NSEC_PER_USEC)) / (usec_t) ts->tv_sec))
+                return (usec_t) -1;
+
         return
                 (usec_t) ts->tv_sec * USEC_PER_SEC +
                 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
@@ -175,6 +178,9 @@ usec_t timeval_load(const struct timeval *tv) {
             tv->tv_usec == (suseconds_t) -1)
                 return (usec_t) -1;
 
+        if (USEC_PER_SEC > (UINT64_MAX - tv->tv_usec) / (usec_t) tv->tv_sec)
+                return (usec_t) -1;
+
         return
                 (usec_t) tv->tv_sec * USEC_PER_SEC +
                 (usec_t) tv->tv_usec;
-- 
1.7.11.7