[Samba] [PATCH] Do not close winbind socket during use

Philippe.Simonet at swisscom.com Philippe.Simonet at swisscom.com
Thu Jun 27 01:14:55 MDT 2013

Hi Andrew,

i tried your both patches (on a 'clean' 4.0.6), and the difference is that 
samba is not crashing anymore, but winbind seems to be blocked
after a wbinfo --uid-info 3000000.

e.g : 
root at gwnois03.test.ch ~# wbinfo --uid-info 3000011

root at gwnois03.test.ch ~# wbinfo --uid-info 3000000
<<no response, infinite timeout>


> -----Original Message-----
> From: Andrew Bartlett [mailto:abartlet at samba.org]
> Sent: Thursday, June 27, 2013 3:43 AM
> To: Simonet Philippe, ITS-OUS-OP-IFM-NW-IPE; metze at samba.org;
> kai at samba.org
> Cc: samba at samba.org; samba-technical at samba.org
> Subject: [PATCH] Do not close winbind socket during use
> On Wed, 2013-06-26 at 20:39 +1000, Andrew Bartlett wrote:
> > On Mon, 2013-06-24 at 15:26 +0000, Philippe.Simonet at swisscom.com
> wrote:
> > > Hi Andrew, and by putting more num-callers :
> > >
> > > valgrind --num-callers=50 samba -i -M single
> >
> > Thanks for getting me that.  I've managed to reproduce it here, but not
> > under valgrind, and only when I hack the code to force a timeout.  At
> > least this should help me figure out why we process the winbind socket
> > close, which is the crux of this issue.
> I think I've found the cause of the issue you are hitting.  There is
> still another issue with the nested event loop in the krb5 libs, but
> these two patches should help significantly.
> As you have had more luck than I in reproducing this in a unaltered
> setting, please let me know if this helps.
> Patches are for git master, but may apply to 4.0 as well.
> Kai, Metze:
> In reading the code, I cannot see why the DNS server would not suffer
> the same issue, if the DNS clients closed it's socket.  Should we find a
> more generic way to do this in service_stream, or should just duplicate
> this?  I don't think other servers hit the same issue as they are
> currently 'blocking' in terms of the socket handler.
> Thanks,
> Andrew Bartlett
> --
> Andrew Bartlett                                http://samba.org/~abartlet/
> Authentication Developer, Samba Team           http://samba.org

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