Call for testing: OpenSSH 8.0

[Damien Miller]

On Sat, 30 Mar 2019, Adam Eijdenberg wrote:

> On Fri, Mar 29, 2019 at 10:31 PM Damien Miller <djm at mindrot.org> wrote:
> > Thanks for testing - are you able to see if there's anything in
> > the server logs?
> 
> I looked in /var/log/secure or /var/log/messages and just saw the 2 lines below:
> 
> Mar 29 20:57:17 ip-10-12-0-116 sshd[14315]: Accepted publickey for
> ec2-user from xxx ssh2: RSA-CERT ID xxx (for xxx) (serial xxx) CA RSA
> SHA256:QtxnpSvhjow+Z68+z5VMnNGitHHc+nkoDMiJM0C+JtM
> Mar 29 20:57:17 ip-10-12-0-116 sshd[14315]: pam_unix(sshd:session):
> session opened for user ec2-user by (uid=0)
> 
> > I've just committed some extra verbosity in the client's log messages that
> > might clarify where it is exiting (patch attached).
> 
> For some reason I couldn't get the patch to apply cleanly over the
> snapshot, so manually applied the lines and ended up with the
> following output:
> 
> (skipped all the pre-authentication logging)
> debug1: Authentication succeeded (publickey).
> Authenticated to xxx
> debug1: channel 0: new [client-session]
> debug3: ssh_session2_open: channel_new: 0
> debug2: channel 0: send open
> debug3: send packet: type 90
> debug1: Requesting no-more-sessions at openssh.com
> debug3: send packet: type 80
> debug1: Entering interactive session.
> debug1: pledge: network
> debug3: receive packet: type 80
> debug1: client_input_global_request: rtype hostkeys-00 at openssh.com want_reply 0
> debug3: receive packet: type 91
> debug2: channel_input_open_confirmation: channel 0: callback start
> debug2: fd 3 setting TCP_NODELAY
> debug3: ssh_packet_set_tos: set IP_TOS 0x48
> debug2: client_session2_setup: id 0
> debug2: channel 0: request pty-req confirm 1
> debug3: send packet: type 98
> debug2: channel 0: request shell confirm 1
> debug3: send packet: type 98
> debug2: channel_input_open_confirmation: channel 0: callback done
> debug2: channel 0: open confirm rwindow 0 rmax 32768
> debug3: send packet: type 1
> client_loop: send disconnect: Broken pipe

It looks like the server hung up unexpectedly. Could you try running the
server in debug mode (sshd -ddd) and capturing its output?

Also, just to confirm - is the server running HEAD or some other version?

Thanks for helping debug this.

-d