summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorBen Hutchings <ben@decadent.org.uk>2019-05-07 22:04:04 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-05-16 10:17:21 +0300
commitb784e7a613d1df6f80ff229ec5d8ce45fb7222df (patch)
treea82c2a9e2248c8df53ef6a02cb896a996ff2cf68
parentb16a6c99f88c16c9b4f736226b736d0c53320614 (diff)
downloadlinux-b784e7a613d1df6f80ff229ec5d8ce45fb7222df.tar.xz
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>
-rw-r--r--kernel/time/timer_stats.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 1fb08f21302e..0334899f1d3e 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -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;