From 80e3fae0bde469cf50a4aee8d4a759884c30e3e5 Mon Sep 17 00:00:00 2001
From: Jonathan Gray <jsg@cvs.openbsd.org>
Date: Tue, 16 Dec 2014 03:19:24 +0000
Subject: Don't display formatted time if localtime() fails. Avoids a crash in
 strftime() found with the afl fuzzer. ok guenther@

---
 usr.bin/kdump/ktrstruct.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'usr.bin/kdump')

diff --git a/usr.bin/kdump/ktrstruct.c b/usr.bin/kdump/ktrstruct.c
index 03910666477..b218ee2027e 100644
--- a/usr.bin/kdump/ktrstruct.c
+++ b/usr.bin/kdump/ktrstruct.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ktrstruct.c,v 1.8 2014/12/15 01:48:54 guenther Exp $	*/
+/*	$OpenBSD: ktrstruct.c,v 1.9 2014/12/16 03:19:23 jsg Exp $	*/
 
 /*-
  * Copyright (c) 1988, 1993
@@ -146,8 +146,11 @@ print_time(time_t t, int relative, int have_subsec)
 
 	if (!relative) {
 		tm = localtime(&t);
-		(void)strftime(timestr, sizeof(timestr), TIME_FORMAT, tm);
-		printf("<\"%s\">", timestr);
+		if (tm != NULL) {
+			(void)strftime(timestr, sizeof(timestr), TIME_FORMAT,
+			    tm);
+			printf("<\"%s\">", timestr);
+		}
 	}
 }
 
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