Coda File System

Kerberos5 auth is causing clog to segfault

From: Mark Phalan <>
Date: Sat, 11 Jan 2003 16:24:22 -0500

I've been trying to get coda to work with kerberos. I've got the kerberos daemons up and running (and working too - kftp works). I've registered the principal name host/myhostname_at_MY.REALM and added it to the keytab file. I've built in kerberos5 support (--with-crypto as in previous post), and the various programs are linking against the correct libs etc. 
The problem arises when I use clog -kerberos5 - it segfaults.
I had a look in the source code to see what is happening and I discovered that during the HashSecret() function in (coda-src/util/) a memcpy is trying to write into a NULL address. The variable it tries to write into is passed to HashSecret() through a number of functions originating from  U_Authenticate() in auser.c where it is declared as a char* and assigned NULL (line 125). As far as I can see nowhere is memory allocated for the variable nor is it assigned any value and hence it causes the segfault in memcpy().
I can't see how kerberos5 support is working at all (and its not for me). Am I missing something important?

Received on 2003-01-12 00:30:35