avoided invalid memory access in RT{USE,REUSE,RELEASE} when 'time_sec…

…ond' is rewinded. (KAME PR 439)
kame · Aug 23, 2002 · 353dac1 · 353dac1
1 parent 4c2449b
commit 353dac1
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/freebsd4/sys/net/route.h b/freebsd4/sys/net/route.h
@@ -330,7 +330,7 @@ struct rttimer_queue {
 		(rt)->rt_use++; \
 		(rt)->rt_lastreftime = time_second; \
 		i = ((rt)->rt_lastreftime - (rt)->rt_createtime) / 300; \
-		if (i > 12) \
+		if (i < 0 || i > 12) \
 			i = 12; \
 		(rt)->rt_usehist[i]++; \
 	} while (0)
@@ -339,7 +339,7 @@ struct rttimer_queue {
 	do { \
 		int i; \
 		i = (time_second - (rt)->rt_createtime) / 300; \
-		if (i > 12) \
+		if (i < 0 || i > 12) \
 			i = 12; \
 		(rt)->rt_reusehist[i]++; \
 	} while (0)
@@ -348,7 +348,7 @@ struct rttimer_queue {
 	do { \
 		int i; \
 		i = (time_second - (rt)->rt_createtime) / 300; \
-		if (i > 12) \
+		if (i < 0 || i > 12) \
 			i = 12; \
 		(rt)->rt_releasehist[i]++; \
 	} while (0)