linux-kernel - [PATCH] kernel: make taskstats available from all net namespaces

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Date:   Tue, 12 Apr 2022 07:19:46 +0000
From:   cgel.zte@...il.com
To:     bsingharora@...il.com, akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org, yang.yang29@....com.cn,
        xu xin <xu.xin16@....com.cn>
Subject: [PATCH] kernel: make taskstats available from all net namespaces

From: xu xin <xu.xin16@....com.cn>

If getdelays run in a non-init network namespace, it will fail in
getting delayacct stats even if it has privilege of root user, which
seems to be not very reasonable. We can simply reproduce this by
executing commands:
	unshare -n
	getdelays -d -p <pid>

I don't think net namespace should be an obstacle to the normal
execution of getdelay function. So let's make it available from
all net namespaces.

Signed-off-by: xu xin <xu.xin16@....com.cn>
---
 kernel/taskstats.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 72415e22342b..f7e246336218 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -688,6 +688,7 @@ static struct genl_family family __ro_after_init = {
 	.module		= THIS_MODULE,
 	.ops		= taskstats_ops,
 	.n_ops		= ARRAY_SIZE(taskstats_ops),
+	.netnsok	= true,
 };
 
 /* Needed early in initialization */
-- 
2.25.1