From: Kay Sievers <kay.sievers@vrfy.org>
Date: Fri, 23 Apr 2010 07:22:42 +0000 (+0200)
Subject: libudev: accept NULL in udev_device_get_tags_list_entry()
X-Git-Tag: 174~517
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=65f099c721fa568350f8ac019e3a99fda1966082;p=systemd

libudev: accept NULL in udev_device_get_tags_list_entry()
---

diff --git a/libudev/libudev-device-private.c b/libudev/libudev-device-private.c
index 7e5fcbc2..8c8ac244 100644
--- a/libudev/libudev-device-private.c
+++ b/libudev/libudev-device-private.c
@@ -51,7 +51,7 @@ int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old,
 	struct udev_list_entry *list_entry;
 	bool found;
 
-	if (add) {
+	if (add && dev_old != NULL) {
 		/* delete possible left-over tags */
 		udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(dev_old)) {
 			const char *tag_old = udev_list_entry_get_name(list_entry);
diff --git a/libudev/libudev-device.c b/libudev/libudev-device.c
index 3f441d09..a6a1ecb4 100644
--- a/libudev/libudev-device.c
+++ b/libudev/libudev-device.c
@@ -1289,6 +1289,8 @@ void udev_device_cleanup_tags_list(struct udev_device *udev_device)
 
 struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device)
 {
+	if (udev_device == NULL)
+		return NULL;
 	return udev_list_get_entry(&udev_device->tags_list);
 }