From: Karel Zak <kzak@redhat.com>
Date: Fri, 19 Jun 2020 08:06:25 +0000 (+0200)
Subject: lib/sysfs: fix prefix use in sysfs_devname_is_hidden()
X-Git-Tag: v2.36-rc2~42
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=51355bea706899deaf47a3ca7092d7cf468437b2;p=thirdparty%2Futil-linux.git

lib/sysfs: fix prefix use in sysfs_devname_is_hidden()

Addresses: https://github.com/karelzak/util-linux/issues/1062
Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/lib/sysfs.c b/lib/sysfs.c
index 38e99c05c7..5b4de2cad9 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -847,6 +847,9 @@ int sysfs_devname_is_hidden(const char *prefix, const char *name)
 
 	if (strncmp("/dev/", name, 5) == 0)
 		return 0;
+
+	if (!prefix)
+		prefix = "";
 	/*
 	 * Create path to /sys/block/<name>/hidden
 	 */