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Date:	Fri, 5 Sep 2014 13:56:48 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Windows Server 2012R2 64bit and 32bit Cygwin sshd
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On Sep  5 13:16, Corinna Vinschen wrote:
> On Sep  4 14:12, Achim Gratz wrote:
> > Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes:
> > > > I couldn't start cygserver as a service with (just) the built DLL i=
n place.
> > >=20
> > > No idea why.  The patch just adds debug output to strace ouptput, not=
hing=20
> > > else.
> >=20
> > Whatever.  I've installed all the binaries from that build and things w=
ork
> > normally now.
> >=20
> > > > So I started it in debug mode from the command line (which makes it=
 have
> > > > less rights than it needs) and started the sshd in debug mode also.
> > >=20
> > > In a cyg_server GUI session?  If so, you should have all rights requi=
red
> > > when starting this in an elevated shell.
> >=20
> > Not the token privileges, I don't think so.  But I'm not sure how to ch=
eck.
>=20
> Windows whoami /all
>=20
> > Here's the salient parts from the strace (attaching to the sshd running=
 as a
> > service in sandbox mode, running with no privilege separation produces a
> > slightly different trace, but the events leading up to the error are th=
e same):
> > [...]
> >    44 5026498 [main] sshd 2248 get_user_groups: Before NetUserGetGroups
> > --- Process 2248, exception 00000005 at 75511D4D
> >=20
> > The process apparently gets killed while in the NetUserGetGroups call (=
much
> > as you suspected).  I'm not sure this tells us anything new, though. :-(
>=20
> No, it just confirms it.
>=20
> Please remove the debug_printf patch and try this instead:
>=20
> Index: sec_auth.cc
> [...]

For simplicity I added this experimental patch to the snapshot I just
uploaded to https://cygwin.com/snapshots/.

Please give it a try.


Thanks,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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