linux-kernel - [PATCH v1 4/9] sysctl: Fixes idmap_cache

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Message-ID: <20250127142014.37834-5-nicolas.bouchinet@clip-os.org>
Date: Mon, 27 Jan 2025 15:20:01 +0100
From: nicolas.bouchinet@...p-os.org
To: linux-kernel@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	linux-scsi@...r.kernel.org,
	codalist@...a.cs.cmu.edu,
	linux-nfs@...r.kernel.org,
	netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org,
	coreteam@...filter.org
Cc: Nicolas Bouchinet <nicolas.bouchinet@....gouv.fr>,
	Joel Granados <j.granados@...sung.com>,
	Bart Van Assche <bvanassche@....org>,
	Leon Romanovsky <leon@...nel.org>,
	Zhu Yanjun <yanjun.zhu@...ux.dev>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Al Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>
Subject: [PATCH v1 4/9] sysctl: Fixes idmap_cache_timeout bounds

From: Nicolas Bouchinet <nicolas.bouchinet@....gouv.fr>

Bound idmap_cache_timeout sysctl writings between SYSCTL_ZERO
and SYSCTL_INT_MAX.

The proc_handler has thus been updated to proc_dointvec_minmax.

Signed-off-by: Nicolas Bouchinet <nicolas.bouchinet@....gouv.fr>
---
 fs/nfs/nfs4sysctl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/nfs/nfs4sysctl.c b/fs/nfs/nfs4sysctl.c
index 886a7c4c60b35..19c1b7ff89f74 100644
--- a/fs/nfs/nfs4sysctl.c
+++ b/fs/nfs/nfs4sysctl.c
@@ -32,7 +32,9 @@ static struct ctl_table nfs4_cb_sysctls[] = {
 		.data = &nfs_idmap_cache_timeout,
 		.maxlen = sizeof(int),
 		.mode = 0644,
-		.proc_handler = proc_dointvec,
+		.proc_handler = proc_dointvec_minmax,
+		.extra1 = SYSCTL_ZERO,
+		.extra2 = SYSCTL_INT_MAX,
 	},
 };
 
-- 
2.48.1