[Samba] WORKAROUND: Re: [samba4] crash of winbind after "ls -l /usr/local/samba/var/locks/sysvol"

[Jeremy Allison]

On Sat, Jun 15, 2013 at 06:35:34PM +1000, Andrew Bartlett wrote:
> On Tue, 2013-04-30 at 20:32 +0000, Philippe.Simonet at swisscom.com wrote:
> > Many thanks Michae for your answer,l
> > 
> > here the results of bisect and some samba 'strange' console output.
> > 
> > I hope this can help
> > 
> > best regards
> > 
> > Philippe
> > 
> > 
> > -----------------------------------------------------------------------------------------------------
> > to produce the problem : 
> > -----------------------------------------------------------------------------------------------------
> > ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --enable-fhs
> > make install
> > samba -i -M single
> > wbinfo --uid-info 3000000
> > 
> > -----------------------------------------------------------------------------------------------------
> > last bisect : 
> > -----------------------------------------------------------------------------------------------------
> > git bisect good
> > f77d5d6479c879c8770fbc9a6ca5656ef3e41019 is the first bad commit
> > commit f77d5d6479c879c8770fbc9a6ca5656ef3e41019
> > Author: Timur Bakeyev <timur at FreeBSD.org>
> > Date:   Wed Feb 27 16:25:07 2013 -0800
> > 
> >     Fix bug # 9666 - Broken filtering of link-local addresses.
> >     
> >     This patch should address the problem with Link Local addresses
> >     on FreeBSD and Linux.
> >     
> >     Reviewed-by: Jeremy Allison <jra at samba.org>
> >     
> >     Autobuild-User(v4-0-test): Karolin Seeger <kseeger at samba.org>
> >     Autobuild-Date(v4-0-test): Fri Mar  1 18:21:19 CET 2013 on sn-devel-104
> > 
> > :040000 040000 e022079ce7298f5cfa9d99e51e7afedb35048b02 164c1aba0559999b0179d3b47f415f6e3e5b3cd7 M      lib
> > -----------------------------------------------------------------------------------------------------
> 
> First, I do apologise for the entirely unacceptable delay in dealing
> with this issue.  I've CC'ed the developers involved in that patch, in
> the hope that they might be able to investigate it.
> 
> It certainly looks like this is a valid bisect, because when I set:
> 	interfaces = virbr0:0 lo 
> 	bind interfaces only = yes
> 
> in the smb.conf the crash isn't reproduced, but when I comment this out,
> it crashes right away. 
> 
> I'll continue to look into this myself, as well as following up with
> those involved in the change, but I wanted to give you a big thankyou
> for doing the bisect, and to say that you clearly are on the right
> track. 

Hmmm. Very strange ! That change prevents link-local and IPv4-compat
addresses being returned in our interface list, otherwise it should
have no effect...

What is the stack backtrace from the crash ?

Jeremy.