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Date: Mon, 9 Jan 2017 14:03:58 +0100
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: Exim & cygwin-2.6.0-1 (x86) fatal Signal 6 on start
Message-ID: <20170109130358.GA843@calimero.vinschen.de>
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References: <31f6707c-6600-c0a3-daff-c0825dcf4f04@rosshemail.com> <586C438A.1060206@alum.mit.edu>
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On Jan  3 19:36, Pierre A. Humblet wrote:
>=20
> On 9/12/2016 8:26 AM, Ross Hemingway wrote:
> > Update to cygwin-2.6.0-1.  Exim has a fatal start error - exim: PID
> > 3756: service `exim' failed: signal 6 raised.
> >=20
> > Rolled back to cygwin-2.5.2-1,  problem averted.
> >=20
>=20
> Sorry for the very long delay in answering.
> The debugging below was done from a non-privileged account, and the
> setuid32() should thus fail, but the program should not abort.
>=20
> It aborts in the call to "free (privs)".
> "privs" are obtained by get_priv_list().
> When the target user is SYSTEM, get_priv_list()  returns (PTOKEN_PRIVILEG=
ES)
> &sys_privs;
> where "sys_privs" is a constant structure that cannot be freed.

Thanks for the analysis.  I pushed a fix.


Corinna

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

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