I am also experiencing this problem, and found that some other processes have this strange signal mask. udevd and dhclient3. They are not descendants of sshd. So I guess the culprit is not sshd but somewhere in the system startup scripts.
** Attachment added: "Output from ps axsf" http://launchpadlibrarian.net/31274197/ps.txt -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
