From bbfaec2b2f43ddf7b8ef42a2a687f536ac445183 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Thu, 20 Nov 2008 02:43:34 +0100
Subject: [PATCH] libudev: accept NULL whitelist in util_replace_chars()

---
 udev/lib/libudev-util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/udev/lib/libudev-util.c b/udev/lib/libudev-util.c
index f4e78850..1cd18c89 100644
--- a/udev/lib/libudev-util.c
+++ b/udev/lib/libudev-util.c
@@ -398,7 +398,7 @@ int udev_util_replace_chars(char *str, const char *white)
 		}
 
 		/* if space is allowed, replace whitespace with ordinary space */
-		if (isspace(str[i]) && strchr(white, ' ') != NULL) {
+		if (isspace(str[i]) && white != NULL && strchr(white, ' ') != NULL) {
 			str[i] = ' ';
 			i++;
 			replaced++;
-- 
2.39.5