Fix Integer-overflow in base::Time::FromExploded.

base/time/time_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/time/time.h"
 
 #include <stdint.h>
 #include <time.h>
 #include <limits>
 #include <string>
@@ skipping 36 matching lines @@
       // Negative milliseconds
       {{2016, 10, 0, 25, 7, 47, 20, -500}, false},
       // Hours are too large
       {{2016, 7, 0, 10, 26, 29, 0, 0}, false},
       // Minutes are too large
       {{2016, 3, 0, 14, 10, 78, 0, 0}, false},
       // Seconds are too large
       {{2016, 10, 0, 25, 7, 47, 234, 0}, false},
       // Milliseconds are too large
       {{2016, 10, 0, 25, 6, 31, 23, 1643}, false},
+      // Test overflow. Time is valid, but overflow case
+      // results in Time(0).
+      {{9840633, 1, 0, 1, 1, 1, 0, 0}, true},
+      // Underflow will fail as well.
+      {{-9840633, 1, 0, 1, 1, 1, 0, 0}, true},
   };
 
   for (const auto& test : kDateTestData) {
     EXPECT_EQ(test.explode.HasValidValues(), test.is_valid);
 
     base::Time result;
     EXPECT_FALSE(base::Time::FromUTCExploded(test.explode, &result));
     EXPECT_TRUE(result.is_null());
     EXPECT_FALSE(base::Time::FromLocalExploded(test.explode, &result));
     EXPECT_TRUE(result.is_null());
@@ skipping 1113 matching lines @@
 
 TEST(TimeTicksLogging, DoesNotMakeStreamBad) {
   std::ostringstream oss;
   oss << TimeTicks();
   EXPECT_TRUE(oss.good());
 }
 
 }  // namespace
 
 }  // namespace base