Does ssh need sendfd in pledge() call?

[Timothy Brown]

On Fri, Jun 28, 2019 at 01:06:15PM +1000, Damien Miller wrote:
> On Thu, 27 Jun 2019, Timothy Brown wrote:
> 
> > Hi,
> > 
> > I posted this question to the OpenBSD bugs list last week, however
> > I have had no reply and it was suggested on IRC that I post here
> > instead. So I must apologise if this is not appropriate.
> 
> Hi - the OpenBSD tech@ mailing list would probably be a better fit for
> discussions of OpenBSD-only problems (AFAIK nobody else has yet adopted
> pledge(2) unfortunately).

OK, I'll move over there.

> 
> That being said, I'm happy to look at it - but would ask you to send the
> output of ssh in verbose mode (i.e. "ssh -vvv host") to see exactly where
> the problem is happening.
> 

I thought I added this as an attachment as it goes over 80 characters wide.

> > I have attached output for when I crank up there verbosity (ssh_verbose.txt),
> > as it contains long lines.

I'll in-line it here, so please excuse the excessive width.

Regards
Timothy

Authenticated to 192.168.1.100 ([192.168.1.100]:22).
debug1: Remote connections from /home/tbrown/.gnupg/S.gpg-agent:-2 forwarded to local address /home/tbrown/.gnupg/S.gpg-agent.extra:-2
debug3: send packet: type 80
debug1: setting up multiplex master socket
debug3: muxserver_listen: temporary control path /home/tbrown/.ssh/mux/192.168.1.100_22_tbrown.2EvGYCjVoPNdAIrh
debug2: fd 4 setting O_NONBLOCK
debug3: fd 4 is O_NONBLOCK
debug3: fd 4 is O_NONBLOCK
debug1: channel 0: new [/home/tbrown/.ssh/mux/192.168.1.100_22_tbrown]
debug3: muxserver_listen: mux listener channel 0 fd 4
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x20
debug1: deferring postauth fork until remote forward confirmation received
debug1: Entering interactive session.
debug1: pledge: id
debug2: set_control_persist_exit_time: schedule exit in 14400 seconds
debug3: receive packet: type 80
debug1: client_input_global_request: rtype hostkeys-00 at openssh.com want_reply 0
debug3: receive packet: type 4
debug1: Remote: /home/tbrown/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 4
debug1: Remote: /home/tbrown/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug3: receive packet: type 81
debug1: remote forward success for: listen /home/tbrown/.gnupg/S.gpg-agent:-2, connect /home/tbrown/.gnupg/S.gpg-agent.extra:-2
debug1: All remote forwarding requests processed
debug1: control_persist_detach: backgrounding master process
debug2: control_persist_detach: background process is 85607
debug2: fd 4 setting O_NONBLOCK
debug1: forking to background
debug1: multiplexing control connection
debug3: fd 5 is O_NONBLOCK
debug3: fd 5 is O_NONBLOCK
debug1: channel 1: new [mux-control]
debug3: channel_post_mux_listener: new mux channel 1 fd 5
debug3: mux_master_read_cb: channel 1: hello sent
debug2: set_control_persist_exit_time: cancel scheduled exit
debug3: mux_master_read_cb: channel 1 packet type 0x00000001 len 4
debug2: mux_master_process_hello: channel 1 slave version 4
debug2: mux_client_hello_exchange: master version 4
debug3: mux_client_forwards: request forwardings: 0 local, 1 remote
debug1: Requesting forwarding of remote forward /home/tbrown/.gnupg/S.gpg-agent:-2 -> /home/tbrown/.gnupg/S.gpg-agent.extra:-2
debug3: mux_master_read_cb: channel 1 packet type 0x10000006 len 92
debug2: mux_master_process_open_fwd: channel 1: request remote forward /home/tbrown/.gnupg/S.gpg-agent:-2 -> /home/tbrown/.gnupg/S.gpg-agent.extra:-2
debug2: mux_master_process_open_fwd: found existing forwarding
debug3: mux_client_request_session: entering
debug3: mux_client_request_alive: entering
debug3: mux_master_read_cb: channel 1 packet type 0x10000004 len 4
debug2: mux_master_process_alive_check: channel 1: alive check
debug3: mux_client_request_alive: done pid = 806
debug3: mux_master_read_cb: channel 1 packet type 0x10000002 len 57
debug2: mux_master_process_new_session: channel 1: request tty 1, X 0, agent 0, subsys 0, term "rxvt-unicode-256color", cmd "", env 0
debug3: mm_receive_fd: recvmsg: Resource temporarily unavailable
mm_receive_fd: recvmsg: expected received 1 got 0
mux_master_process_new_session: failed to receive fd 0 from slave
debug1: channel 1: mux_rcb failed
debug2: channel 1: zombie
debug2: channel 1: gc: notify user
debug3: mux_master_control_cleanup_cb: entering for channel 1
debug2: channel 1: gc: user detached
debug2: channel 1: zombie
debug2: channel 1: garbage collecting
debug1: channel 1: free: mux-control, nchannels 2
debug3: channel 1: status: The following connections are open:

debug2: set_control_persist_exit_time: schedule exit in 14400 seconds
Abort trap (core dumped)
xps ~$