nfs-server-2.2beta44 on Redhat 5.2, with kernel 2.2.9.

My /etc/exports looks like this:
/hj4    @all-cc(rw)

We've got some hosts that are not in the all-cc netgroup,
and should be denied access to /hj4.  rpc.mountd does deny
the mount to these systems, but suffers a SIGSEGV in the
process.

After inspecting auth.c:auth_unknown_clientbyaddr() this
behavior seems not to be strictly a YP problem, but rather
any unauthorized host requesting services from mountd.

Here is a (quite simple) patch:

*** nfs-server-2.2beta43/auth.c.OLD     Sat Aug 14 21:39:56
1999
--- nfs-server-2.2beta43/auth.c Sat Aug 14 21:40:18 1999
***************
*** 479,485 ****
                auth_add_mountlist(ncp, cp->m, 0);
        }

!       auth_sort_mountlist(ncp->m);
        return ncp;
  }

--- 479,485 ----
                auth_add_mountlist(ncp, cp->m, 0);
        }

!       if(ncp) auth_sort_mountlist(ncp->m);
        return ncp;
  }




------
Neil Bright
Computing and Networking Services
College of Computing
Georgia Institute of Technology