Error Msg --> "fork of unprivileged child failed"

[Eric Desgranges]

I have installed OpenSSH on a RedHat 7.1. When I try to log on I get a 'connection closed' after I enter my password. What is wrong???

Here is the debug info:

# /usr/sbin/sshd -ddd
debug1: sshd version OpenSSH_3.5p1
debug1: private host key: #0 type 0 RSA1
debug3: Not a RSA1 key file /etc/ssh/ssh_host_rsa_key.
debug1: read PEM private key done: type RSA
debug1: private host key: #1 type 1 RSA
debug3: Not a RSA1 key file /etc/ssh/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #2 type 2 DSA
socket: Address family not supported by protocol
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
Generating 768 bit RSA key.
RSA key generation complete.
debug1: Server will not fork when running in debugging mode.
Connection from 148.63.229.186 port 2079
debug1: Client protocol version 2.0; client software version PenguiNet-$Revision:_1.26_$
debug1: no match: PenguiNet-$Revision:_1.26_$
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-1.99-OpenSSH_3.5p1
debug2: Network child is on pid 16135
debug3: privsep user:group 507:508
debug1: permanently_set_uid: 507/508
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug3: preauth child monitor started
debug3: mm_request_receive entering
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
,rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
,rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-sha1-96,
hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at 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: kex_parse_kexinit: diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: 3des-cbc,blowfish-cbc,aes128-cbc,rijndael128-cbc,aes192-cbc,rijndael192-cb
c,aes256-cbc,rijndael256-cbc,cast128-cbc,twofish128-cbc,twofish192-cbc,twofish256-cbc,twofish-cbc,ser
pent128-cbc,serpent192-cbc,serpent256-cbc,arcfour
debug2: kex_parse_kexinit: 3des-cbc,blowfish-cbc,aes128-cbc,rijndael128-cbc,aes192-cbc,rijndael192-cb
c,aes256-cbc,rijndael256-cbc,cast128-cbc,twofish128-cbc,twofish192-cbc,twofish256-cbc,twofish-cbc,ser
pent128-cbc,serpent192-cbc,serpent256-cbc,arcfour
debug2: kex_parse_kexinit: hmac-sha1,hmac-md5,hmac-ripemd160,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-sha1,hmac-md5,hmac-ripemd160,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: zlib,none
debug2: kex_parse_kexinit: zlib,none
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-sha1
debug1: kex: client->server 3des-cbc hmac-sha1 zlib
debug2: mac_init: found hmac-sha1
debug1: kex: server->client 3des-cbc hmac-sha1 zlib
debug1: dh_gen_key: priv key bits set: 196/384
debug1: bits set: 499/1024
debug1: expecting SSH2_MSG_KEXDH_INIT
debug1: bits set: 487/1024
debug3: mm_key_sign entering
debug3: mm_request_send entering: type 4
debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN
debug3: mm_request_receive_expect entering: type 5
debug3: mm_request_receive entering
debug3: monitor_read: checking request 4
debug3: mm_answer_sign
debug3: mm_answer_sign: signature 0x80975c8(143)
debug3: mm_request_send entering: type 5
debug2: monitor_read: 4 used once, disabling now
debug3: mm_request_receive entering
debug1: kex_derive_keys
debug1: newkeys: mode 1
debug1: Enabling compression at level 6.
debug1: SSH2_MSG_NEWKEYS sent
debug1: waiting for SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: KEX done
debug1: userauth-request for user sshd service ssh-connection method password
debug1: attempt 0 failures 0
debug3: mm_getpwnamallow entering
debug3: mm_request_send entering: type 6
debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM
debug3: mm_request_receive_expect entering: type 7
debug3: mm_request_receive entering
debug3: monitor_read: checking request 6
debug3: mm_answer_pwnamallow
debug3: allowed_user: today 12025 sp_expire -1 sp_lstchg 12025 sp_max 99999
debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
debug3: mm_request_send entering: type 7
debug2: monitor_read: 6 used once, disabling now
debug3: mm_request_receive entering
debug2: input_userauth_request: setting up authctxt for sshd
debug3: mm_inform_authserv entering
debug3: mm_request_send entering: type 3
debug2: input_userauth_request: try method password
debug3: mm_auth_password entering
debug3: mm_request_send entering: type 10
debug3: monitor_read: checking request 3
debug3: mm_auth_password: waiting for MONITOR_ANS_AUTHPASSWORD
debug3: mm_answer_authserv: service=ssh-connection, style=
debug2: monitor_read: 3 used once, disabling now
debug3: mm_request_receive entering
debug3: monitor_read: checking request 10
debug3: mm_request_receive_expect entering: type 11
debug3: mm_answer_authpassword: sending result 1
debug3: mm_request_send entering: type 11
Accepted password for sshd from 148.63.229.186 port 2079 ssh2
debug1: monitor_child_preauth: sshd has been authenticated by privileged process
debug3: mm_get_keystate: Waiting for new keys
debug3: mm_request_receive_expect entering: type 24
debug3: mm_request_receive entering
debug3: mm_request_receive entering
debug3: mm_auth_password: user authenticated
Accepted password for sshd from 148.63.229.186 port 2079 ssh2
debug3: mm_send_keystate: Sending new keys: 0x80986b0 0x8091fb0
debug3: mm_newkeys_to_blob: converting 0x80986b0
debug3: mm_newkeys_to_blob: converting 0x8091fb0
debug3: mm_send_keystate: New keys have been sent
debug3: mm_send_keystate: Sending compression state
debug3: mm_request_send entering: type 24
debug3: mm_newkeys_from_blob: 0x80921c8(121)
debug2: mac_init: found hmac-sha1
debug3: mm_get_keystate: Waiting for second key
debug3: mm_newkeys_from_blob: 0x80921c8(121)
debug2: mac_init: found hmac-sha1
debug3: mm_get_keystate: Getting compression state
debug3: mm_get_keystate: Getting Network I/O buffers
debug3: mm_share_sync: Share sync
debug3: mm_share_sync: Share sync end
debug3: mm_send_keystate: Finished sending state
fork of unprivileged child failed
debug1: Calling cleanup 0x8069d3c(0x0)
#

Thank you!
Eric.
eric at lesouk.com