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Date: Wed, 9 May 2007 15:48:51 -0700
From: Christopher Cowart <ccowart@rescomp.berkeley.edu>
To: freebsd-questions@freebsd.org
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Organization: RSSP-IT, UC Berkeley
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Subject: sshd segfaults on exit when no tty allocated
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Hello,

When I ssh into FreeBSD hosts without allocating a tty, sshd segfaults
after the process terminates. This problem occurs on both 6_1_REL and
6_2_REL installations at all sorts of patch levels.

Examples:

Client: `ssh -t server ls`
Server Logs:=20
| May  9 15:33:44 server sshd[1503]: Accepted publickey for ccowart from=20
|     client port 43604 ssh2
| May  9 15:33:45 server sshd[1505]: pam_sm_close_session(): no utmp=20
|     record for ttyp5

Client: `ssh server ls`
Server Logs:
| May  9 15:33:50 server sshd[1509]: Accepted publickey for ccowart from
|   client port 42119 ssh2
| May  9 15:33:51 server pid 1511 (sshd), uid 1225: exited on signal 11

In either example, the client thinks the command has completed
successfully, shows proper output, and propogates the return value from
the remote command. The main problem is I don't like seeing a bunch of
segfaults being logged in the daily run output.

Our sshd_config stock, except we set `PermitRootLogin yes`.

Does anyone know why this happens? Should I file a problem report?

Thanks,

--=20
Chris Cowart
Lead Systems Administrator
Network Infrastructure, RSSP-IT
UC Berkeley

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