From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: posix_spawn issues on i686
Date: Wed, 12 Jan 2022 12:24:21 +0100 [thread overview]
Message-ID: <Yd66ZZ3kEecT0KTc@calimero.vinschen.de> (raw)
In-Reply-To: <Yd6wZ0r7EXOGcQfQ@calimero.vinschen.de>
On Jan 12 11:41, Corinna Vinschen wrote:
> On Jan 11 16:08, Ken Brown wrote:
> > On 1/11/2022 1:45 PM, Jeremy Drake via Cygwin wrote:
> > > Sorry, I am not subscribed to the list so don't have the message to reply
> > > to for threading purposes, but attached please find a C reproducer that
> > > works on x86_64 but fails on i686. The particular issue seems to be the
> > > POSIX_SPAWN_RESETIDS flag - not setting that allows i686 to succeed too.
>
> Thanks for the STC, Jeremy!
>
> > I don't have time to check this carefully, but it looks to me like the
> > problem is that process_spawnattr calls setegid and seteuid instead of
> > setegid32 and seteuid32. This causes truncation of the gid and uid.
>
> You're right. Additionally the calls to getgid and getuid have to use
> the internal getgid32 and getuid32 functions.
>
> I'll apply a fix.
New developer snapshot is up at https://cygwin.com/snapshots/
Please test.
Thanks,
Corinna
next prev parent reply other threads:[~2022-01-12 11:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-10 19:38 Jeremy Drake
2022-01-11 10:07 ` Corinna Vinschen
2022-01-11 18:45 ` Jeremy Drake
2022-01-11 21:08 ` Ken Brown
2022-01-12 10:41 ` Corinna Vinschen
2022-01-12 11:24 ` Corinna Vinschen [this message]
2022-01-12 16:32 ` Ken Brown
2022-01-12 21:25 ` Jeremy Drake
2022-01-14 9:15 ` Corinna Vinschen
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