Segfault when joining a Mac OSX client

[Andrew Bartlett]

On Wed, 2011-06-29 at 09:05 +1000, Andrew Bartlett wrote:
> On Tue, 2011-06-28 at 20:24 +0100, Adam Thorn wrote:
> > On Tue, 2011-06-28 at 19:38 +0100, Adam Thorn wrote:
> > > Hi,
> > > 
> > > I'm running samba-4.0.0alpha16, and when I try to join a MacOSX client
> > > (specifically, version 10.6.8) to the domain the log shows that the
> > > samba binary has died with signal 11. After setting
> > > 
> > > panic action=/usr/src/samba4/selftest/gdb_backtrace %PID%
> > > 
> > > I can track the segfault down to the call of strncasecomp() at
> > > 
> > > source4/dsdb/samdb/ldb_modules/acl.c:506
> > > 
> > > which is being called with instanceName set to null. Digging a bit more,
> > > at the call to krb5_parse_name on line 468, spn_value is just set to the
> > > computer account name (that is, computername$). 
> > 
> > I also get exactly the same behaviour (spn_value is computername$ and so
> > instanceName is null) with samba-4.0.0alpha15 and MacOS 10.6.2. Although
> > I would generally avoid trying to change multiple variables at the same
> > time, acl.c hasn't changed between alpha15 and alpha16.
> 
> Thank-you for your analysis.  The full backtrace would be useful to
> avoid miscommunication, and I hope to look into this for you shortly.

A network trace would also be handy.

Thanks,

Andrew Bartlett

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org