File 0019-dhcp-4.2.4-P1-interval.patch of Package dhcp

commit 9a312e3cd914da2b6f32651c94d1d1d4fb0bf359
Author: Jiri Popelka <jpopelka@redhat.com>
Date:   Fri Jul 27 10:00:49 2012 +0200

    isc_time_nowplusinterval() is not safe with 64-bit time_t (#662254, #789601)

References: bsc#947780
Index: dhcp-4.2.4-P2/common/dispatch.c
===================================================================
--- dhcp-4.2.4-P2.orig/common/dispatch.c
+++ dhcp-4.2.4-P2/common/dispatch.c
@@ -320,7 +320,20 @@ void add_timeout (when, where, what, ref
 	q->next  = timeouts;
 	timeouts = q;
 
-	isc_interval_set(&interval, sec & DHCP_SEC_MAX, usec * 1000);
+	/* isc_time_nowplusinterval() is not safe with 64-bit time_t and will
+	 * return an error for sufficiently large intervals.  We have to limit
+	 * the interval to INT_MAX or less to ensure the interval doesn't
+	 * overflow 32 bits, since the returned isc_time_t fields are
+	 * 32-bit unsigned ints.
+	 *
+	 * HACK: The 9 is a magic number of seconds, since some time may have
+	 * gone by since the last call to gettimeofday() and the one in
+	 * isc_time_nowplusinterval().
+	 */
+	if (sec > TIME_MAX)
+		sec = TIME_MAX - 9;
+
+	isc_interval_set(&interval, sec, usec * 1000);
 	status = isc_time_nowplusinterval(&expires, &interval);
 	if (status != ISC_R_SUCCESS) {
 		/*