"procps" error caused by recent update to Ubuntu 12.04 (12.04.3)

[David Jones]

Recent updates on a typical Ubuntu 12.04 (12.04.3) LAMP server has errors relating to updates to the "procps" package.

Apparently, /proc/sys/kernel/kptr_restrict is no longer editable, even by root,
and is always set to "1", as confirmed by: cat /proc/sys/kernel/kptr_restrict

Therefore, attempts to change it in /etc/sysctl.d/10-kernel-hardening.conf will fail.

As a consequence of this, apt-get will complain with errors and the "procps" package will never finish being installed.

- - - - -

An effective workaround is to comment out this line: (in the file: /etc/sysctl.d/10-kernel-hardening.conf )
# kernel.kptr_restrict = 1

And then run this command: service procps restart

-- David

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andreas Gutlederer (5ndreas)]

Workaround doesn't work for me but I'm able to change /proc/sys/kernel/kptr_restrict:

# cat /proc/sys/kernel/kptr_restrict
1

# echo 2 > /proc/sys/kernel/kptr_restrict
# cat /proc/sys/kernel/kptr_restrict
2

[Filip Dorosz (fihufil)]

This workaround worked for me. However iptables now seem to work quite strange. Valid config (it used to worked well in same containers) block outgoing connections but not incomming etc.
This happen on updated 12.04.3 on OpenVZ.
greetings.
~Filip