The culprit is udev. udev runs "ifup" when it founds eth0, then ifup starts dhclient3 and restarts sshd!
Temporary fix to this: - Remove "auto eth0" from /etc/network/interfaces - Add "/sbin/ifup eth0" to /etc/rc.local (before "exit 0", of course)
Now only udev has the strange signal mask on my machine.
The culprit is udev.
udev runs "ifup" when it founds eth0, then ifup starts dhclient3 and restarts sshd!
Temporary fix to this: interfaces
- Remove "auto eth0" from /etc/network/
- Add "/sbin/ifup eth0" to /etc/rc.local (before "exit 0", of course)
Now only udev has the strange signal mask on my machine.