From: orc <orc@sibserver.ru>
To: musl@lists.openwall.com
Subject: Re: openssh and sendmsg() problem
Date: Wed, 27 Jun 2012 01:24:41 +0800 [thread overview]
Message-ID: <20120627012441.2af9b154@sibserver.ru> (raw)
In-Reply-To: <20120626160106.GJ544@brightrain.aerifal.cx>
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?
next prev parent reply other threads:[~2012-06-26 17:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-26 11:01 orc
2012-06-26 12:00 ` Szabolcs Nagy
2012-06-26 16:01 ` Rich Felker
2012-06-26 17:24 ` orc [this message]
2012-06-26 17:32 ` Rich Felker
2012-06-26 18:16 ` orc
2012-06-26 19:08 ` Rich Felker
2012-06-26 19:39 ` orc
2012-06-26 20:40 ` Szabolcs Nagy
2012-06-26 21:13 ` Rich Felker
2012-07-01 10:23 ` orc
2012-06-26 18:32 ` John Spencer
2012-06-26 18:34 ` orc
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