Messages in this thread Patch in this message | | | From | Chunyan Zhang <> | Subject | [PATCH] class: fix use-after-free in class_register() | Date | Mon, 18 Dec 2023 10:44:03 +0800 |
| |
From: Jing Xia <jing.xia@unisoc.com>
The lock_class_key is still registered and can be found in lock_keys_hash hlist after subsys_private is freed in error handler path.A task who iterate over the lock_keys_hash later may cause use-after-free.So fix that up and unregister the lock_class_key before kfree(cp).
Signed-off-by: Jing Xia <jing.xia@unisoc.com> Signed-off-by: Xuewen Yan <xuewen.yan@unisoc.com> --- drivers/base/class.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/base/class.c b/drivers/base/class.c index 7e78aee0fd6c..7b38fdf8e1d7 100644 --- a/drivers/base/class.c +++ b/drivers/base/class.c @@ -213,6 +213,7 @@ int class_register(const struct class *cls) return 0; err_out: + lockdep_unregister_key(key); kfree(cp); return error; } -- 2.25.1
| |