linux-kernel - [PATCH 1/2] yama: Make sysctl table const

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Message-Id: <20250123-sysctl-kees-v1-1-533359e74d66@suse.com>
Date: Thu, 23 Jan 2025 16:33:34 -0300
From: Ricardo B. Marliere <ricardo@...liere.net>
To: Kees Cook <kees@...nel.org>, Paul Moore <paul@...l-moore.com>, 
 James Morris <jmorris@...ei.org>, "Serge E. Hallyn" <serge@...lyn.com>
Cc: linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Ricardo B. Marliere" <rbm@...e.com>, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 1/2] yama: Make sysctl table const

Since commit 7abc9b53bd51 ("sysctl: allow registration of const struct
ctl_table"), the sysctl registration API allows for struct ctl_table to be
in read-only memory. Move yama_sysctl_table to be declared at build time,
instead of having to be dynamically allocated at boot time.

Cc: Thomas Weißschuh <linux@...ssschuh.net>
Suggested-by: Thomas Weißschuh <linux@...ssschuh.net>
Signed-off-by: Ricardo B. Marliere <rbm@...e.com>
---
 security/yama/yama_lsm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/yama/yama_lsm.c b/security/yama/yama_lsm.c
index e1a5e13ea269d4917fe2c78cb79f1d44881653c2..54bd5f535ac1fef9409ea96ad60825f565318daf 100644
--- a/security/yama/yama_lsm.c
+++ b/security/yama/yama_lsm.c
@@ -454,7 +454,7 @@ static int yama_dointvec_minmax(const struct ctl_table *table, int write,

 static int max_scope = YAMA_SCOPE_NO_ATTACH;

-static struct ctl_table yama_sysctl_table[] = {
+static const struct ctl_table yama_sysctl_table[] = {
 	{
 		.procname       = "ptrace_scope",
 		.data           = &ptrace_scope,

-- 
2.48.1