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Description of problem:
running sshd on a redhat 8.0 and connecting from redhat 7.3, i get no response.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.environment (see additional information)
2.ssh <redhat8.0 box>
	

Actual Results:  the ssh hangs and gives no feedback

Expected Results:  i should get the password: prompt

Additional info:

strace of the sshd on the 8.0 box:

# strace -fp 20490
select(4, [3], NULL, NULL, NULL)        = 1 (in [3])
accept(3, {sin_family=AF_INET, sin_port=htons(48740),
sin_addr=inet_addr("193.77.112.21")}}, [16]) = 4
fcntl(4, F_SETFL, O_RDONLY)             = 0
pipe([5, 6])                            = 0
fork()                                  = 20497
[pid 20490] --- SIGCHLD (Child exited) ---
[pid 20490] wait4(-1, 0x7ffff140, WNOHANG, NULL) = -1 ECHILD (No child processes)
[pid 20490] rt_sigaction(SIGCHLD, {0x804cd20, [CHLD], SA_RESTORER|SA_RESTART,
0x2ac7ec88}, {0x804cd20, [CHLD], SA_RESTORER|SA_RESTART, 0x2ac7ec88}, 8) = 0
[pid 20490] sigreturn()                 = ? (mask now [])
[pid 20490] close(6)                    = 0
[pid 20490] rt_sigaction(SIGALRM, {0x804ce80, [ALRM], SA_RESTORER|SA_RESTART,
0x2ac7ec88}, {SIG_DFL}, 8) = 0
[pid 20490] alarm(3600)                 = 0
[pid 20490] getpid()                    = 20490
[pid 20490] getpid()                    = 20490
[pid 20490] close(4)                    = 0
[pid 20490] select(6, [3 5], NULL, NULL, NULL <unfinished ...>

as can be seen, the child process immediately exits for unknown reason.

ssh -vvv output on the 7.3 box:

$ ssh -vvv root@172.16.8.63
OpenSSH_3.1p1, SSH protocols 1.5/2.0, OpenSSL 0x0090600f
debug1: Reading configuration data /home/me/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Rhosts Authentication disabled, originating port will not be trusted.
debug1: restore_uid
debug1: ssh_connect: getuid 8043 geteuid 0 anon 1
debug1: Connecting to 172.16.8.63 [172.16.8.63] port 22.
debug1: temporarily_use_uid: 8043/8000 (e=0)
debug1: restore_uid
debug1: temporarily_use_uid: 8043/8000 (e=0)
debug1: restore_uid
debug1: Connection established.
debug1: read PEM private key done: type DSA
debug1: read PEM private key done: type RSA
debug1: identity file /home/me/.ssh/identity type 0
debug3: Not a RSA1 key file /home/me/.ssh/id_rsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: no key found
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: no key found
debug1: identity file /home/me/.ssh/id_rsa type 1
debug3: Not a RSA1 key file /home/me/.ssh/id_dsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: no key found
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug3: key_read: no space
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: no key found
debug1: identity file /home/me/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version OpenSSH_3.1p1
debug1: match: OpenSSH_3.1p1 pat OpenSSH*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.1p1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: dh_gen_key: priv key bits set: 121/256
debug1: bits set: 1593/3191
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/me/.ssh/known_hosts2
debug3: key_read: type mismatch
debug3: check_host_in_hostfile: filename /etc/ssh/ssh_known_hosts2
debug3: check_host_in_hostfile: filename /home/me/.ssh/known_hosts
debug2: key_type_from_name: unknown key type '1024'
debug3: key_read: no key found
debug3: check_host_in_hostfile: filename /etc/ssh/ssh_known_hosts
Warning: Permanently added '172.16.8.63' (RSA) to the list of known hosts.
debug1: bits set: 1594/3191
debug1: ssh_rsa_verify: signature correct
debug1: kex_derive_keys
debug1: newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: waiting for SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: done: ssh_kex2.
debug1: send SSH2_MSG_SERVICE_REQUEST
debug1: service_accept: ssh-userauth
debug1: got SSH2_MSG_SERVICE_ACCEPT
debug1: authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: next auth method to try is publickey
debug1: try pubkey: /home/me/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: authentications that can continue: publickey,password,keyboard-interactive
debug1: try pubkey: /home/me/.ssh/id_dsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: authentications that can continue: publickey,password,keyboard-interactive
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: next auth method to try is keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug1: authentications that can continue: publickey,password,keyboard-interactive
debug3: userauth_kbdint: disable: no info_req_seen
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: 
debug3: authmethod_is_enabled password
debug1: next auth method to try is password
root@172.16.8.63's password: 
debug1: packet_send2: adding 64 (len 57 padlen 7 extra_pad 64)
debug2: we sent a password packet, wait for reply
debug1: ssh-userauth2 successful: method password
debug3: clear hostkey 0
debug3: clear hostkey 1
debug3: clear hostkey 2
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug1: send channel open 0
debug1: Entering interactive session.
debug2: callback start
debug1: ssh_session2_setup: id 0
debug1: channel request 0: pty-req
debug3: tty_make_modes: ospeed 38400
debug3: tty_make_modes: ispeed 38400
debug3: tty_make_modes: 1 3
debug3: tty_make_modes: 2 28
debug3: tty_make_modes: 3 127
debug3: tty_make_modes: 4 21
debug3: tty_make_modes: 5 4
debug3: tty_make_modes: 6 255
debug3: tty_make_modes: 7 255
debug3: tty_make_modes: 8 17
Connection to 172.16.8.63 closed.


for the 8.0 box: it's one of the famous 440gx machines that refuse to run
properly with any 2.4 kernel (aic7xxx irq routing & co fun). in this case i was
forced to use latest kernel for the redhat 6.2 (2.2.19-6.2.16). could this have
to do something with this ssh issue?