[patch] kobject: don't oops on null kobject.name

[Chuck Ebbert <76306.1226@compuserve.com>]

kobject_get_path() will oops if one of the component names is
NULL.  Fix that by returning NULL instead of oopsing.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
---

Helge, this fixes your "2.6.15 OOPS while trying to mount cdrom".

Probably not the best fix, but It Works For Me (TM).

--- 2.6.15a.orig/lib/kobject.c
+++ 2.6.15a/lib/kobject.c
@@ -72,6 +72,8 @@ static int get_kobj_path_length(struct k
 	 * Add 1 to strlen for leading '/' of each level.
 	 */
 	do {
+		if (kobject_name(parent) == NULL)
+			return 0;
 		length += strlen(kobject_name(parent)) + 1;
 		parent = parent->parent;
 	} while (parent);
@@ -107,6 +109,8 @@ char *kobject_get_path(struct kobject *k
 	int len;
 
 	len = get_kobj_path_length(kobj);
+	if (len == 0)
+		return NULL;
 	path = kmalloc(len, gfp_mask);
 	if (!path)
 		return NULL;
-- 
Chuck
Currently reading: _Olympos_ by Dan Simmons