From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/1242 Path: news.gmane.org!not-for-mail From: John Spencer Newsgroups: gmane.linux.lib.musl.general Subject: Re: openssh and sendmsg() problem Date: Tue, 26 Jun 2012 20:32:27 +0200 Message-ID: <4FEA003B.3030100@barfooze.de> References: <20120626190146.1c086ed2@sibserver.ru> <20120626120017.GZ17860@port70.net> <20120626160106.GJ544@brightrain.aerifal.cx> <20120627012441.2af9b154@sibserver.ru> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1340734929 25341 80.91.229.3 (26 Jun 2012 18:22:09 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 26 Jun 2012 18:22:09 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-1243-gllmg-musl=m.gmane.org@lists.openwall.com Tue Jun 26 20:22:09 2012 Return-path: 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 ) id 1SjaOt-0004uj-76 for gllmg-musl@plane.gmane.org; Tue, 26 Jun 2012 20:22:07 +0200 Original-Received: (qmail 32703 invoked by uid 550); 26 Jun 2012 18:22:07 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 32695 invoked from network); 26 Jun 2012 18:22:07 -0000 User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.14) Gecko/20110221 SUSE/3.1.8 Mail/1.0 In-Reply-To: <20120627012441.2af9b154@sibserver.ru> Xref: news.gmane.org gmane.linux.lib.musl.general:1242 Archived-At: On 06/26/2012 07:24 PM, orc wrote: > On Tue, 26 Jun 2012 12:01:06 -0400 > Rich Felker wrote: > >> On Tue, Jun 26, 2012 at 02:00:17PM +0200, Szabolcs Nagy wrote: >>> * orc [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? > you might want to try this recipe, which is known to work https://github.com/rofl0r/sabotage/blob/master/pkg/openssh