static int ecryptfs_init_global_auth_toks(
	struct ecryptfs_mount_crypt_stat *mount_crypt_stat)
{
	struct ecryptfs_global_auth_tok *global_auth_tok;
	struct ecryptfs_auth_tok *auth_tok;
	int rc = 0;

	list_for_each_entry(global_auth_tok,
			    &mount_crypt_stat->global_auth_tok_list,
			    mount_crypt_stat_list) {
		rc = ecryptfs_keyring_auth_tok_for_sig(
			&global_auth_tok->global_auth_tok_key, &auth_tok,
			global_auth_tok->sig);
		if (rc) {
			printk(KERN_ERR "Could not find valid key in user "
			       "session keyring for sig specified in mount "
			       "option: [%s]\n", global_auth_tok->sig);
			global_auth_tok->flags |= ECRYPTFS_AUTH_TOK_INVALID;
			goto out;
		} else {
			global_auth_tok->flags &= ~ECRYPTFS_AUTH_TOK_INVALID;
			up_write(&(global_auth_tok->global_auth_tok_key)->sem);
		}
	}
out:
	return rc;
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.