From: jsg <jsg@openbsd.org>
Date: Tue, 16 Dec 2014 03:19:23 +0000 (+0000)
Subject: Don't display formatted time if localtime() fails.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=40f07bdcf47daace717819c51e706e5a063bacf2;p=openbsd

Don't display formatted time if localtime() fails.
Avoids a crash in strftime() found with the afl fuzzer.
ok guenther@
---

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);
+		}
 	}
 }