Hello all I am currently following a hang at modprobe aes_s390 where crypto_register_alg() does not come back for the xts(aes) algorithm. The registration is waiting forever in algapi.c crypto_wait_for_test() but the completion never occurs. The cryptomgr is triggering a test via kthread_run to invoce cryptomgr_probe and this thread is calling the create() function of the xts template (file xts.c). Following this thread it comes down to api.c crypto_larval_lookup(name="aes") which is first requesting the module "crypto-aes" via request_module() successful and then blocking forever in requesting the module "crypto-aes-all". The xts(aes) has at registration CRYPTO_ALG_NEED_FALLBACK flag on. This problem is seen since about 6 weeks now, first only on the linux next kernel. Now it appers on the 4.10-rc kernels as well. And I still have no idea on how this could be fixed or what's wrong with just the xts registration (ecb, cbc, ctr work fine). Any ideas or hints? Thank's in advance. regards Harald Freudenberger
