>> Could we please queue up the following patch as a stable fix for >> commit a974deee47? It needs to be applied to v4.10 and older. > > Now applied, thanks. Until kernel 4.11.9 is into Fedora's updates, I downgraded our server acting as the NIS master to 4.10.16-200. But all NIS users time out with "ypserv: #011-> Error #-3. Could this be a different issue with rpcbind or nfs-utils? Here are some debug enabled logs for RPC with a different error "xs_error_report client ffff8d8223caa000, error=113" Jul 5 16:13:05 dsm kernel: RPC: looking up machine cred for service * Jul 5 16:13:05 dsm kernel: RPC: set up xprt to 150.108.64.64 (port 2049) via tcp Jul 5 16:13:05 dsm kernel: RPC: created transport ffff8d8223cab800 with 65536 slots Jul 5 16:13:05 dsm kernel: RPC: creating nfs client for erdos (xprt ffff8d8223cab800) Jul 5 16:13:05 dsm kernel: RPC: creating GSS authenticator for client ffff8d8102d37c00 Jul 5 16:13:05 dsm kernel: RPC: Couldn't create auth handle (flavor 390004) Jul 5 16:13:05 dsm kernel: RPC: destroying transport ffff8d8223cab800 Jul 5 16:13:05 dsm kernel: RPC: xs_destroy xprt ffff8d8223cab800 Jul 5 16:13:05 dsm kernel: RPC: xs_close xprt ffff8d8223cab800 Jul 5 16:13:05 dsm kernel: RPC: disconnected transport ffff8d8223cab800 Jul 5 16:13:05 dsm kernel: RPC: set up xprt to ourip (port 2049) via tcp Jul 5 16:13:05 dsm kernel: RPC: created transport ffff8d8223caa000 with 65536 slots Jul 5 16:13:05 dsm kernel: RPC: creating nfs client for erdos (xprt ffff8d8223caa000) Jul 5 16:13:05 dsm kernel: RPC: creating UNIX authenticator for client ffff8d8102d37c00 Jul 5 16:13:05 dsm kernel: RPC: new task initialized, procpid 5281 Jul 5 16:13:05 dsm kernel: RPC: allocated task ffff8d822385a900 Jul 5 16:13:05 dsm kernel: RPC: 65012 __rpc_execute flags=0x680 Jul 5 16:13:05 dsm kernel: RPC: 65012 call_start nfs4 proc NULL (sync) Jul 5 16:13:05 dsm kernel: RPC: 65012 call_reserve (status 0) Jul 5 16:13:05 dsm kernel: RPC: 65012 reserved req ffff8d8102d36000 xid fea54e04 Jul 5 16:13:05 dsm kernel: RPC: wake_up_first(ffff8d8223caa170 "xprt_sending") Jul 5 16:13:05 dsm kernel: RPC: 65012 call_reserveresult (status 0) Jul 5 16:13:05 dsm kernel: RPC: 65012 call_refresh (status 0) Jul 5 16:13:05 dsm kernel: RPC: 65012 holding NULL cred ffffffffc036e440 Jul 5 16:13:05 dsm kernel: RPC: 65012 refreshing NULL cred ffffffffc036e440 Jul 5 16:13:05 dsm kernel: RPC: 65012 call_refreshresult (status 0) Jul 5 16:13:05 dsm kernel: RPC: 65012 call_allocate (status 0) Jul 5 16:13:05 dsm kernel: RPC: 65012 allocated buffer of size 96 at ffff8d8223caa800 Jul 5 16:13:05 dsm kernel: RPC: 65012 call_bind (status 0) Jul 5 16:13:05 dsm kernel: RPC: 65012 call_connect xprt ffff8d8223caa000 is not connected Jul 5 16:13:05 dsm kernel: RPC: 65012 xprt_connect xprt ffff8d8223caa000 is not connected Jul 5 16:13:05 dsm kernel: RPC: 65012 sleep_on(queue "xprt_pending" time 4557317640) Jul 5 16:13:05 dsm kernel: RPC: 65012 added to queue ffff8d8223caa218 "xprt_pending" Jul 5 16:13:05 dsm kernel: RPC: 65012 setting alarm for 60000 ms Jul 5 16:13:05 dsm kernel: RPC: xs_connect scheduled xprt ffff8d8223caa000 Jul 5 16:13:05 dsm kernel: RPC: 65012 sync task going to sleep Jul 5 16:13:05 dsm kernel: RPC: xs_bind 0.0.0.0:699: ok (0) Jul 5 16:13:05 dsm kernel: RPC: worker connecting xprt ffff8d8223caa000 via tcp to our ip (port 2049) Jul 5 16:13:05 dsm kernel: RPC: ffff8d8223caa000 connect status 115 connected 0 sock state 2 Jul 5 16:13:05 dsm kernel: RPC: wake_up_first(ffff8d8223caa170 "xprt_sending") Jul 5 16:13:05 dsm kernel: RPC: xs_error_report client ffff8d8223caa000, error=113... Jul 5 16:13:05 dsm kernel: RPC: 65012 __rpc_wake_up_task (now 4557317640) Jul 5 16:13:05 dsm kernel: RPC: 65012 disabling timer Jul 5 16:13:05 dsm kernel: RPC: 65012 removed from queue ffff8d8223caa218 "xprt_pending" Jul 5 16:13:05 dsm kernel: RPC: __rpc_wake_up_task done Jul 5 16:13:05 dsm kernel: RPC: 65012 sync task resuming Jul 5 16:13:05 dsm kernel: RPC: xs_tcp_state_change client ffff8d8223caa000... Jul 5 16:13:05 dsm kernel: RPC: state 7 conn 0 dead 0 zapped 1 sk_shutdown 3 Jul 5 16:13:05 dsm kernel: RPC: 65012 xprt_connect_status: retrying Jul 5 16:13:05 dsm kernel: RPC: 65012 call_connect_status (status -113) Jul 5 16:13:05 dsm kernel: RPC: disconnected transport ffff8d8223caa000 Jul 5 16:13:05 dsm kernel: RPC: 65012 return 0, status -113