key = lookup_user_key(id, 0, 0, KEY_WRITE); 
key = lookup_user_key(NULL, id, 0, 0, KEY_WRITE); 
long keyctl_revoke_key(key_serial_t id){	struct key *key;	long ret;	key = lookup_user_key(id, 0, 0, KEY_WRITE);	if (IS_ERR(key)) {		ret = PTR_ERR(key);		goto error;	}	key_revoke(key);	ret = 0;	key_put(key); error:	return 0;} /* end keyctl_revoke_key() */
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/3e30148c3d524a9c1c63ca28261bc24c457eb07a/keyctl.c/buggy/security/keys/keyctl.c