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kobject: modify kobject_get_path() to take a const * 

[ Upstream commit 33a0a1e3b3 ]

kobject_get_path() does not modify the kobject passed to it, so make the
pointer constant.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20221001165315.2690141-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 3bb2a01caa ("kobject: Fix slab-out-of-bounds in fill_kobj_path()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Greg Kroah-Hartman 2022-10-01 18:53:15 +02:00
parent 7cf515bf9e
commit f3ffd86915
2 changed files with 6 additions and 6 deletions
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2
include/linux/kobject.h
View File

@ -115,7 +115,7 @@ extern void kobject_put(struct kobject *kobj);
extern const void *kobject_namespace(struct kobject *kobj);
extern void kobject_get_ownership(struct kobject *kobj,
kuid_t *uid, kgid_t *gid);
extern char *kobject_get_path(struct kobject *kobj, gfp_t flag);
extern char *kobject_get_path(const struct kobject *kobj, gfp_t flag);
struct kobj_type {
void (*release)(struct kobject *kobj);

10
lib/kobject.c
View File

@ -94,10 +94,10 @@ static int create_dir(struct kobject *kobj)
return 0;
}
static int get_kobj_path_length(struct kobject *kobj)
static int get_kobj_path_length(const struct kobject *kobj)
{
int length = 1;
struct kobject *parent = kobj;
const struct kobject *parent = kobj;
/* walk up the ancestors until we hit the one pointing to the
* root.
@ -112,9 +112,9 @@ static int get_kobj_path_length(struct kobject *kobj)
return length;
}
static void fill_kobj_path(struct kobject *kobj, char *path, int length)
static void fill_kobj_path(const struct kobject *kobj, char *path, int length)
{
struct kobject *parent;
const struct kobject *parent;
--length;
for (parent = kobj; parent; parent = parent->parent) {
@ -136,7 +136,7 @@ static void fill_kobj_path(struct kobject *kobj, char *path, int length)
*
* Return: The newly allocated memory, caller must free with kfree().
*/
char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask)
char *kobject_get_path(const struct kobject *kobj, gfp_t gfp_mask)
{
char *path;
int len;