linux-kernel - [PATCH v3 3/3] sysctl: Fixes max-user-freq bounds

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Message-ID: <20250306123514.386434-4-nicolas.bouchinet@clip-os.org>
Date: Thu,  6 Mar 2025 13:35:10 +0100
From: nicolas.bouchinet@...p-os.org
To: coda@...cmu.edu,
	linux-kernel@...r.kernel.org,
	codalist@...a.cs.cmu.edu,
	linux-nfs@...r.kernel.org
Cc: Nicolas Bouchinet <nicolas.bouchinet@....gouv.fr>,
	Joel Granados <j.granados@...sung.com>,
	Clemens Ladisch <clemens@...isch.de>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jan Harkes <jaharkes@...cmu.edu>,
	Trond Myklebust <trondmy@...nel.org>,
	Anna Schumaker <anna@...nel.org>
Subject: [PATCH v3 3/3] sysctl: Fixes max-user-freq bounds

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

Bound max-user-freq 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>
---
 drivers/char/hpet.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index e110857824fcb..528b43e893d49 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -730,7 +730,9 @@ static const struct ctl_table hpet_table[] = {
 	 .data = &hpet_max_freq,
 	 .maxlen = sizeof(int),
 	 .mode = 0644,
-	 .proc_handler = proc_dointvec,
+	 .proc_handler = proc_dointvec_minmax,
+	 .extra1 = SYSCTL_ZERO,
+	 .extra2 = SYSCTL_INT_MAX,
 	 },
 };
 
-- 
2.48.1