core file created on starting sshd

[Tang Poh Leong]

I am using openssh-3.1p1. Run ./opt/openssh2/sbin/sshd&
The ssh daemon ran successfully but a core file is also created. Meanwhile, the ssh daemon seemed to be working OK.

Anyone got any idea what is wrong ?

[U.SivaKumar_2]

hi,
Try running sshd in foreground and look for any errors reported.
#./opt/openssh2/sbin/sshd

regards,
U.SivaKumar

[Tang Poh Leong]

I ran sshd on foreground. No errors appear. Core file is still created whenever I start sshd.

[Steve Steel]

Hi

maybe it is something sshd calls.

do
file core

show us the output


Steve Steel

[Tang Poh Leong]

Below is the output:

# file core
core: core file from 'last' - received SIGSEGV

[Steven Sim Kok Leong]

Hi,

What is the timestamp of the generated core (same time as sshd daemon startup)? Did sshd wrote any error messages into syslog?

Hope this helps. Regards.

Steven Sim Kok Leong

[Bill McNAMARA_1]

Where did you get it from?
The hpux porting archive:
http://hpux.cs.utah.edu/ ?

Later,
Bill

[Tang Poh Leong]

Hi,

I found the reason behind the core file. It is not caused by sshd. The acct facility was trying to write the login session into the wtmp file. The file was corrupted => memory core dump when "last" tries to access it.

I recreate the wtmp file and everything was OK. No more core file when sshd was started up.

Thanks to all who replied.