Commit 54ac4ffa authored by Ben Hutchings's avatar Ben Hutchings Committed by Xponential31
Browse files

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: default avatarBen Hutchings <ben@decadent.org.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1be5a9c7

kernel/time/timer_stats.c

+1 −1
Original line number Diff line number Diff line
@@ -417,7 +417,7 @@ static int __init init_tstats_procfs(void) 
{

	struct proc_dir_entry *pe;



	pe = proc_create("timer_stats", 0644, NULL, &tstats_fops);

	pe = proc_create("timer_stats", 0600, NULL, &tstats_fops);

	if (!pe)

		return -ENOMEM;

	return 0;