The commit is pushed to "branch-rh9-5.14.vz9.1.x-ovz" and will appear at
https://src.openvz.org/scm/ovz/vzkernel.git
after ark-5.14
------>
commit 92dc7e022cab72f6da6d23fd59e822038ab70325
Author: Kirill Tkhai <ktk...@virtuozzo.com>
Date: Thu Sep 30 17:44:07 2021 +0300
mm: Do not leak node data to CT's /proc/vmstat
Extracted from "Initial patch".
Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
(cherry-picked from vz8 commit 9f9072abf5e1 ("mm: Do not leak node
data to CT's /proc/vmstat"))
Signed-off-by: Nikita Yushchenko <nikita.yushche...@virtuozzo.com>
---
mm/vmstat.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 0ed75620f8f2..30436a098821 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1722,6 +1722,12 @@ static void *vmstat_start(struct seq_file *m, loff_t
*pos)
m->private = v;
if (!v)
return ERR_PTR(-ENOMEM);
+
+ if (!ve_is_super(get_exec_env())) {
+ memset(v, 0, NR_VMSTAT_ITEMS * sizeof(unsigned long));
+ return (unsigned long *)m->private + *pos;
+ }
+
for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
v[i] = global_zone_page_state(i);
v += NR_VM_ZONE_STAT_ITEMS;
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