Upgraded to 17.10. Uninstalled and reinstalled openssh-client, openssh- server (including loading a fresh /usr/etc/ssh directory).
Still fails. I attach the output of: sudo strace -f -e trace=socket /usr/sbin/sshd -d 2>&1 | tee sshd.result.txt All the other configuration is as before. What other information can I get for you so as not to just get this issue closed again? I've downloaded source, but of course it configures to run from /usr/local. What are the correct flags for ./configure to get it to build the way Ubuntu builds it and install to the Ubuntu paths? Alternatively, where can I find out how to run the daemon from /usr/local/sbin instead of /usr/sbin? (That would allow me to configure the extra debugging information requested in the second comment.) ** Attachment added: "Output of strace - showing the 'socket' call in the child process." https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1690485/+attachment/4993455/+files/sshd.result.txt -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1690485 Title: openssh-server SIGSYS with 'UsePrivilegeSeparation sandbox' Status in openssh package in Ubuntu: New Bug description: The 'sshd' process gets 'authentication failure' and refuses to allow any login. dmesg indicates that the problem is SIGSYS on a call to 'socket' (syscall #41, signal #31). On a hunch, I decided to test whether the problem is related to 'seccomp' and changed /etc/ssh/sshd_config from the default # UsePrivilegeSeparation sandbox to the former standard value UsePrivilegeSeparation yes and logins started to work again. Obviously, I'd like to have the additional protection that sandboxing would give me. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: openssh-server 1:7.4p1-10 ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8 Uname: Linux 4.10.0-20-generic x86_64 ApportVersion: 2.20.4-0ubuntu4 Architecture: amd64 CurrentDesktop: XFCE Date: Fri May 12 21:06:20 2017 InstallationDate: Installed on 2017-04-08 (35 days ago) InstallationMedia: SourcePackage: openssh UpgradeStatus: Upgraded to zesty on 2017-04-24 (19 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1690485/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
