From: Karel Zak <kzak@redhat.com>
Date: Mon, 31 Aug 2015 08:11:01 +0000 (+0200)
Subject: lib/sysfs: make sysfs_next_subsystem() more robust
X-Git-Tag: v2.27~26
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=32c9ce4bafa76003f732b6e60e794c15a1942ca8;p=thirdparty%2Futil-linux.git

lib/sysfs: make sysfs_next_subsystem() more robust

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/lib/sysfs.c b/lib/sysfs.c
index caf89bf536..d2146d5fb9 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -658,6 +658,8 @@ int sysfs_next_subsystem(struct sysfs_cxt *cxt __attribute__((unused)),
 	if (!subsys || !devchain)
 		return -EINVAL;
 
+	*subsys = NULL;
+
 	while ((sub = get_subsystem(devchain, subbuf, sizeof(subbuf)))) {
 		*subsys = strdup(sub);
 		if (!*subsys)