Use largest supported date for cookies if timegm overflows

net/cookies/cookie_util.cc

Index: net/cookies/cookie_util.cc
diff --git a/net/cookies/cookie_util.cc b/net/cookies/cookie_util.cc
index 210b8d479af7bcafc3274746b321a0fc6915d26c..5a378064638309e729e685bbdf8532cf38d475b7 100644
--- a/net/cookies/cookie_util.cc
+++ b/net/cookies/cookie_util.cc
@@ -205,7 +205,16 @@ base::Time ParseCookieTime(const std::string& time_string) {
       exploded.month >= 1 && exploded.month <= 12 &&
       exploded.year >= 1601 && exploded.year <= 30827 &&
       exploded.hour <= 23 && exploded.minute <= 59 && exploded.second <= 59) {
-    return base::Time::FromUTCExploded(exploded);
+    base::Time time;
+    if (!base::Time::FromUTCExploded(exploded, &time)) {
+      if (exploded.year > 1970) {
+        // Overflow occured in the platform time conversion. Let's
+        // used the largest possible time value.
+        time = base::Time::GetMaxPlatformTime();
+        LOG(WARNING) << "Parsed cookie time was clamped to " << time;
+      }
+    }
+    return time;
   }
 
   // One of our values was out of expected range.  For well-formed input,