tree 5f25d34d1f59d6ef80f2755bf50105b223fe542f
parent bab022db454a4c074054f30344416f12821ca11f
author Ben Hutchings <ben@decadent.org.uk> 1557255844 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1557503531 +0200

timer/debug: Change /proc/timer_stats from 0644 to 0600

The timer_stats facility should filter and translate PIDs if opened
from a non-initial PID namespace, to avoid leaking information about
the wider system.  It should also not show kernel virtual addresses.
Unfortunately it has now been removed upstream (as redundant)
instead of being fixed.

For stable, fix the leak by restricting access to root only.  A
similar change was already made for the /proc/timer_list file.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>