function u2fh_register2 get wrong result because pointer error about libu2f-host HOT 5 CLOSED

U2FH_EXPORT u2fh_rc u2fh_register (u2fh_devs * devs,
				const char *challenge,
				const char *origin,
				char **response, u2fh_cmdflags flags);

U2FH_EXPORT u2fh_rc u2fh_register2 (u2fh_devs * devs,
				 const char *challenge,
				 const char *origin,
				 char *response, size_t * response_len,
				 u2fh_cmdflags flags);
u2fh_rc
u2fh_register2 (u2fh_devs * devs,
		const char *challenge,
		const char *origin, char *response, size_t * response_len,
		u2fh_cmdflags flags)
{
  return _u2fh_register (devs, challenge, origin, &response, response_len,
			 flags);
}
u2fh_rc
u2fh_register (u2fh_devs * devs,
	       const char *challenge,
	       const char *origin, char **response, u2fh_cmdflags flags)
{
  size_t response_len = 0;
  *response = NULL;
  return _u2fh_register (devs, challenge, origin, response, &response_len,
			 flags);
}

U2FH_EXPORT u2fh_rc u2fh_register2 (u2fh_devs * devs,
				 const char *challenge,
				 const char *origin,
				 char **response, size_t * response_len,
				 u2fh_cmdflags flags);
u2fh_rc
u2fh_register2 (u2fh_devs * devs,
		const char *challenge,
		const char *origin, char **response, size_t * response_len,
		u2fh_cmdflags flags)
{
  return _u2fh_register (devs, challenge, origin, response, response_len,
			 flags);