From: biubiuzy <294772273@qq.com>
Date: Fri, 23 Feb 2024 09:44:12 +0000 (+0800)
Subject: last: avoid out of bounds array access
X-Git-Tag: v2.40~34
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c706b31e8fa42ccdb19588f36569f6799ba71323;p=thirdparty%2Futil-linux.git

last: avoid out of bounds array access

(cherry picked from commit 75822efb8e948b538d9e9ccc329a5430fdabb7ea)
---

diff --git a/login-utils/last.c b/login-utils/last.c
index bbbe817f8..f5a9fec08 100644
--- a/login-utils/last.c
+++ b/login-utils/last.c
@@ -351,7 +351,10 @@ static int time_formatter(int fmt, char *dst, size_t dlen, time_t *when)
 	{
 		char buf[CTIME_BUFSIZ];
 
-		ctime_r(when, buf);
+		if (!ctime_r(when, buf)) {
+			ret = -1;
+			break;
+		}
 		snprintf(dst, dlen, "%s", buf);
 		ret = rtrim_whitespace((unsigned char *) dst);
 		break;