question about exclusion control of slapd

Hi, I'm reading the source code of slapd 2.4.21, then I found feel uneasy point.

in servers/slapd/bind.c:207

cleanup: if ( rs->sr_err == LDAP_SUCCESS ) { if ( op->orb_method != LDAP_AUTH_SASL ) { ber_dupbv( &op->o_conn->c_authmech, &mech ); } op->o_conn->c_authtype = op->orb_method; }

I think that this operation need mutex lock as follows.

ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex ); ... ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );

Regards,