There are two bad effects with obd_self_export passing to lut_client_alloc/free. First, it is just not needed to allocate client data for it, second, this can cause assertion in lut_client_free() if lut_init() wasn't called due to failed mdt_init0().

Fix could be just check for exp == exp->exp_obd->obd_self_export in mdt/obdfilter. Alternatively that can be done inside lut_client_alloc/free but I like to keep them generic