Date: Fri, 18 Jan 2008 08:44:00 -0800 From: Sam Leffler <sam@errno.com> To: John Hay <jhay@meraka.org.za> Cc: freebsd-arm@freebsd.org, des@freebsd.org Subject: Re: sshd broken on arm? Message-ID: <4790D750.4060702@errno.com> In-Reply-To: <20080118095439.GA5677@zibbi.meraka.csir.co.za> References: <20080117105854.GA44923@zibbi.meraka.csir.co.za> <20080118095439.GA5677@zibbi.meraka.csir.co.za>
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John Hay wrote:
> On Thu, Jan 17, 2008 at 12:58:54PM +0200, John Hay wrote:
>
>> Hi Guys,
>>
>> I just did a new build using RELENG_7 for the arm (Avila boards) and then
>> found that I cannot ssh into them. The sshd crash with a bus error just
>> after you entered your username and password. My build of mid November
>> did not do it. Anybody got ideas?
>>
>> The last part of "sshd -Dddd" on the arm board looks like this:
>>
>> debug1: server_input_channel_req: channel 0 request pty-req reply 0
>> debug1: session_by_channel: session 0 channel 0
>> debug1: session_input_channel_req: session 0 req pty-req
>> debug1: Allocating pty.
>> debug3: mm_request_send entering: type 25
>> debug3: monitor_read: checking request 25
>> debug3: mm_answer_pty entering
>> debug1: session_new: init
>> debug1: session_new: session 0
>> debug3: mm_pty_allocate: waiting for MONITOR_ANS_PTY
>> debug3: mm_request_receive_expect entering: type 26
>> debug3: mm_request_receive entering
>> debug3: mm_request_send entering: type 26
>> ssh_mm_receive_fd: recvmsg: expected received 1 got 0
>> debug1: do_cleanup
>> debug1: PAM: cleanup
>> Bus error (core dumped)
>> debug3: PAM: sshpam_thread_cleanup entering
>>
>
> Ok, I found the problem. It looks like something changed and now the
> alignment for the char tmp[...] array in monitor_fdpass.c:mm_send_fd
> and monitor_fdpass.c:mm_receive_fd is different and the arm processors
> do not like it. Attached is my quick fix.
>
> One question that I have is if we should just fix all of these "problems"
> or should something be changed so that these things are aligned again? In
> the last month or two I have come across quite a few of these things that
> used to work on the arm and now do not anymore because of alignment
> changes.
>
> (I have cc'ed des@ because his name pitch up a lot in the openssh cvs logs.
> :-)
>
This used to work fine so the problem is elsewhere. Sounds like a
toolchain or header change is the root cause.
Sam
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