Hello,

I recently ran an upgrade of my freeipa servers, and most of the clients to
4.4.0 (Current with CentOS 7 repos) from version 4.2.0. After the install
and server update, I can no longer log in to update clients via ssh. Login
to non-update clients works as before.

The SSH connections fail with:

Connection closed by UNKNOWN

I ran sssd with debugging on a failing 4.4.0 client and got this error log:

(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [ldb] (0x4000): commit
ldb transaction (nesting: 2)
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [ldb] (0x4000): commit
ldb transaction (nesting: 1)
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [ldb] (0x4000): commit
ldb transaction (nesting: 0)
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]]
[selinux_child_create_buffer] (0x4000): buffer size: 45
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [child_handler_setup]
(0x2000): Setting up signal handler up for pid [437]
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [child_handler_setup]
(0x2000): Signal handler set up for pid [437]
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [sdap_process_result]
(0x2000): Trace: sh[0x560c04c37790], connected[1], ops[(nil)],
ldap[0x560c04c32d60]
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [sdap_process_result]
(0x2000): Trace: end of ldap_result list
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [write_pipe_handler]
(0x0400): All data has been sent!
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [main] (0x0400):
selinux_child started.
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [main] (0x2000):
Running with effective IDs: [0][0].
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [main] (0x2000):
Running with real IDs [0][0].
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [main] (0x0400):
context initialized
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [unpack_buffer]
(0x2000): seuser length: 12
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [unpack_buffer]
(0x2000): seuser: unconfined_u
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [unpack_buffer]
(0x2000): mls_range length: 14
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [unpack_buffer]
(0x2000): mls_range: s0-s0:c0.c1023
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [unpack_buffer]
(0x2000): username length: 7
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [unpack_buffer]
(0x2000): username: ipauser
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [main] (0x0400):
performing selinux operations
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [sss_semanage_init]
(0x0020): SELinux policy not managed
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [get_seuser]
(0x0020): Cannot create SELinux handle
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]]
[seuser_needs_update] (0x2000): get_seuser: ret: 5 seuser: unknown mls:
unknown
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [sss_semanage_init]
(0x0020): SELinux policy not managed
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [set_seuser]
(0x0020): Cannot init SELinux management
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [main] (0x0020):
Cannot set SELinux login context.
(Wed Dec 20 20:38:13 2016) [[sssd[selinux_child[437]]]] [main] (0x0020):
selinux_child failed!
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [read_pipe_handler]
(0x0400): EOF received, client finished
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [selinux_child_done]
(0x0020): selinux_child_parse_response failed: [22][Invalid argument]
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [dp_req_done] (0x0400):
DP Request [PAM SELinux #3]: Request handler finished [0]: Success
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [_dp_req_recv]
(0x0400): DP Request [PAM SELinux #3]: Receiving request data.
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [dp_req_destructor]
(0x0400): DP Request [PAM SELinux #3]: Request removed.
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [dp_req_destructor]
(0x0400): Number of active DP request: 0
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [dp_pam_reply]
(0x1000): DP Request [PAM Account #2]: Sending result [4][domain.local]
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [child_sig_handler]
(0x1000): Waiting for child [437].
(Wed Dec 20 20:38:13 2016) [sssd[be[domain.local]]] [child_sig_handler]
(0x0020): child [437] failed with status [1].
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [sbus_remove_timeout] (0x2000):
0x55f4be11f4c0
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [sbus_dispatch] (0x4000): dbus conn:
0x55f4be1191b0
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [sbus_dispatch] (0x4000):
Dispatching.
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [pam_dp_process_reply] (0x0200):
received: [4 (System error)][domain.local]
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [pam_reply] (0x0200): pam_reply
called with result [4]: System error.
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [pam_reply] (0x0200): blen: 39
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [reset_idle_timer] (0x4000): Idle
timer re-set for client [0x55f4be11f980][19]
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [reset_idle_timer] (0x4000): Idle
timer re-set for client [0x55f4be11f980][19]
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [client_recv] (0x0200): Client
disconnected!
(Wed Dec 20 20:38:13 2016) [sssd[pam]] [client_close_fn] (0x2000):
Terminated client [0x55f4be11f980][19]
(Wed Dec 20 20:38:13 2016) [sssd[nss]] [reset_idle_timer] (0x4000): Idle
timer re-set for client [0x5604f5217c60][22]
(Wed Dec 20 20:38:13 2016) [sssd[nss]] [client_recv] (0x0200): Client
disconnected!
(Wed Dec 20 20:38:13 2016) [sssd[nss]] [client_close_fn] (0x2000):
Terminated client [0x5604f5217c60][22]
(Wed Dec 20 20:38:13 2016) [sssd[nss]] [reset_idle_timer] (0x4000): Idle
timer re-set for client [0x5604f5216b20][21]
(Wed Dec 20 20:38:13 2016) [sssd[nss]] [client_recv] (0x0200): Client
disconnected!
(Wed Dec 20 20:38:13 2016) [sssd[nss]] [client_close_fn] (0x2000):
Terminated client [0x5604f5216b20][21]


SeLinux is disabled, as I am running the clients in LXC containers on a
debian host. My setup is pretty simple, and was working before (and
connections to 4.2.0 clients are still functional!). Nothing looks amiss in
the ssh logs.

Thanks for any help,
-Dan
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