From 7cec343a89a0862c09f5ddd4707eb442157a4af2 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@samba.org>
Date: Tue, 8 May 2018 09:22:00 +0200
Subject: [PATCH] lib:util: Fix string check in mkdir_p()

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13437

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
---
 lib/util/mkdir_p.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/util/mkdir_p.c b/lib/util/mkdir_p.c
index 290a1f39520..87a3f797618 100644
--- a/lib/util/mkdir_p.c
+++ b/lib/util/mkdir_p.c
@@ -49,11 +49,11 @@ int mkdir_p(const char *dir, int mode)
 
 	/* Create ancestors */
 	len = strlen(dir);
-	if (len >= PATH_MAX) {
+	ret = snprintf(t, sizeof(t), "%s", dir);
+	if (ret != len) {
 		errno = ENAMETOOLONG;
 		return -1;
 	}
-	strncpy(t, dir, len+1);
 
 	ret = mkdir_p(dirname(t), mode);
 	if (ret != 0) {