check bounds before casting (long long) to time_t

1 files changed, 6 insertions, 0 deletions

diff --git a/crypto/compat/timegm.c b/crypto/compat/timegm.c
index 5a9e600..2658445 100644
--- a/crypto/compat/timegm.c
+++ b/crypto/compat/timegm.c
@@ -208,6 +208,12 @@ time_t timegm(struct tm *tm)
                 errno = EOVERFLOW;
                 return -1;
         }
+#if SIZEOF_TIME_T != 8
+        if (t > (long long)INT_MAX || t < (long long)INT_MIN) {
+                errno = EOVERFLOW;
+                return -1;
+        }
+#endif
         *tm = new;
         tm->tm_isdst = 0;
         return t;