eCryptfs: use list_for_each_entry_safe() when wiping auth toks

static void wipe_auth_tok_list(struct list_head *auth_tok_list_head)

{

	struct list_head *walker;

	struct ecryptfs_auth_tok_list_item *auth_tok_list_item;

	struct ecryptfs_auth_tok_list_item *auth_tok_list_item_tmp;

	walker = auth_tok_list_head->next;

	while (walker != auth_tok_list_head) {

		auth_tok_list_item =

		    list_entry(walker, struct ecryptfs_auth_tok_list_item,

			       list);

		walker = auth_tok_list_item->list.next;

		memset(auth_tok_list_item, 0,

		       sizeof(struct ecryptfs_auth_tok_list_item));

	list_for_each_entry_safe(auth_tok_list_item, auth_tok_list_item_tmp,

				 auth_tok_list_head, list) {

		list_del(&auth_tok_list_item->list);

		kmem_cache_free(ecryptfs_auth_tok_list_item_cache,

				auth_tok_list_item);

	}

	auth_tok_list_head->next = NULL;

}

struct kmem_cache *ecryptfs_auth_tok_list_item_cache;

/**

 * parse_tag_1_packet

 * @crypt_stat: The cryptographic context to modify based on packet