From mboxrd@z Thu Jan  1 00:00:00 1970
X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/1239
Path: news.gmane.org!not-for-mail
From: orc <orc@sibserver.ru>
Newsgroups: gmane.linux.lib.musl.general
Subject: Re: openssh and sendmsg() problem
Date: Wed, 27 Jun 2012 01:24:41 +0800
Message-ID: <20120627012441.2af9b154@sibserver.ru>
References: <20120626190146.1c086ed2@sibserver.ru>
	<20120626120017.GZ17860@port70.net>
	<20120626160106.GJ544@brightrain.aerifal.cx>
Reply-To: musl@lists.openwall.com
NNTP-Posting-Host: plane.gmane.org
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-Trace: dough.gmane.org 1340731601 29721 80.91.229.3 (26 Jun 2012 17:26:41 GMT)
X-Complaints-To: usenet@dough.gmane.org
NNTP-Posting-Date: Tue, 26 Jun 2012 17:26:41 +0000 (UTC)
To: musl@lists.openwall.com
Original-X-From: musl-return-1240-gllmg-musl=m.gmane.org@lists.openwall.com Tue Jun 26 19:26:41 2012
Return-path: <musl-return-1240-gllmg-musl=m.gmane.org@lists.openwall.com>
Envelope-to: gllmg-musl@plane.gmane.org
Original-Received: from mother.openwall.net ([195.42.179.200])
	by plane.gmane.org with smtp (Exim 4.69)
	(envelope-from <musl-return-1240-gllmg-musl=m.gmane.org@lists.openwall.com>)
	id 1SjZXE-0001jB-Rj
	for gllmg-musl@plane.gmane.org; Tue, 26 Jun 2012 19:26:40 +0200
Original-Received: (qmail 7375 invoked by uid 550); 26 Jun 2012 17:26:40 -0000
Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm
Precedence: bulk
List-Post: <mailto:musl@lists.openwall.com>
List-Help: <mailto:musl-help@lists.openwall.com>
List-Unsubscribe: <mailto:musl-unsubscribe@lists.openwall.com>
List-Subscribe: <mailto:musl-subscribe@lists.openwall.com>
Original-Received: (qmail 7367 invoked from network); 26 Jun 2012 17:26:36 -0000
In-Reply-To: <20120626160106.GJ544@brightrain.aerifal.cx>
X-Mailer: claws-mail
Xref: news.gmane.org gmane.linux.lib.musl.general:1239
Archived-At: <http://permalink.gmane.org/gmane.linux.lib.musl.general/1239>

On Tue, 26 Jun 2012 12:01:06 -0400
Rich Felker <dalias@aerifal.cx> wrote:

> On Tue, Jun 26, 2012 at 02:00:17PM +0200, Szabolcs Nagy wrote:
> > * orc <orc@sibserver.ru> [2012-06-26 19:01:46 +0800]:
> > > strace shows that sendmsg system call returns EINVAL:
> > > 
> > > sendmsg(5, {msg_name(0)=NULL, msg_iov(1)=[{"\0", 1}],
> > > msg_controllen=24, {cmsg_len=20, cmsg_level=SOL_SOCKET, cmsg_
> > > type=SCM_RIGHTS, {4, 385875968}}, msg_flags=0}, 0) = -1 EINVAL
> > > (Invalid argument)
> > > 
> > 
> > src/network/sendmsg.c has an ifdef for long>int case
> > 
> > i don't know what it's supposed to do
> 
> It's there because the kernel expects certain fields to be long but
> POSIX requires them to be int. Thus the syscall wrapper has to copy
> the userspace struct (with int and padding) to a kernel-format struct
> (with the padding filled with 0's so it's a valid long).

And how to deal with this? Should it be openssh workaround or fix in
musl itself?