[Pkg-samba-maint] Bug#732342: Stack Trace

[Andrew Bartlett]

On Tue, 2014-01-07 at 16:58 -0800, Steve Langasek wrote:
> On Wed, Jan 08, 2014 at 01:54:32PM +1300, Andrew Bartlett wrote:
> 
> > > > Reading symbols from /usr/lib/x86_64-linux-gnu/libhdb.so.9...Reading
> > > > symbols from
> > > > /usr/lib/debug/usr/lib/x86_64-linux-gnu/libhdb.so.9.2.0...done.
> > > > done.
> > > > Loaded symbols for /usr/lib/x86_64-linux-gnu/libhdb.so.9
> 
> > > > That happened with the samba server in PDC mode, running "passwd"
> > > > via sssd or changing the password via Windows 8.
> 
> > > I'm sorry to say that this stack trace shows signs of stack corruption.
> > > "0x0000000000000000" and "0x0000000000000008" are not valid addresses to
> > > appear in a backtrace.
> 
> > > You may have better luck debugging by running under valgrind, which can
> > > often detect stack corruption errors at runtime /before/ they clobber the
> > > stack.
> 
> > I strongly suspect in this and in 734355 that Heimdal and Samba have got
> > out of sync.  We use libhdb (and other parts) from Heimdal in a quite
> > intimate manner.
> 
> By "intimate", do you mean "using private interfaces"?

Samba is developed and tested with the in-tree version of Heimdal.  The
way it's packaged in debian isn't how we develop or test it, but allows
us to comply with policies regarding bundled libraries. 

> What are the relevant values of "in-sync-ness" for heimdal?

I would prefer it was exactly the version we have in-tree, but that's
now quite old.

Andrew Bartlett

-- 
Andrew Bartlett
http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba



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