Re: kpasswdd dumps on OpenBSD6.3

> On Aug 2, 2018, at 12:33 PM, ASV <[email protected]> wrote:
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00001db26a5615d6 in change () from
> /usr/local/heimdal/lib/libkadm5srv.so.3.0
> Current language:  auto; currently minimal
> (gdb) The program is running.  Exit anyway? (y or n) n
> Not confirmed.
> (gdb) backtrace
> #0  0x00001db26a5615d6 in change () from
> /usr/local/heimdal/lib/libkadm5srv.so.3.0
> #1  0x00001db26a56155f in kadm5_s_chpass_principal_cond () from
> /usr/local/heimdal/lib/libkadm5srv.so.3.0
> #2  0x00001dafc3001b90 in ?? () from
> /usr/local/heimdal/libexec/kpasswdd
> #3  0x00001dafc3000996 in ?? () from
> /usr/local/heimdal/libexec/kpasswdd
> #4  0x0000000000000000 in ?? ()
> 
> Any help would be highly appreciated.
> Thanks in advance.

1.  Please rebuild heimdal with debugging symbols:

	CFLAGS="-g -ggdb3 -O0"

    that should make possible a stack trace with line numbers, ...

2.  What happens when you try to change the password as root via
    "kadmin -l cpw ..."?  Does that work?

3.  It might be helpful to know what HDB backend you're using.

4.  Even without symbols you can ask GDB for the faulting instruction:

	x/i $pc

    and print the register values:

 	i reg

This may help to understand whether this a NULL pointer dereference,
or something else.

-- 
	Viktor.