linux-kernel - [PATCH 2/7] sysctl: clarify proc_douintvec

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Message-Id: <20251217-jag-no-macro-conv-v1-2-6e4252687915@kernel.org>
Date: Wed, 17 Dec 2025 09:04:40 +0100
From: Joel Granados <joel.granados@...nel.org>
To: Kees Cook <kees@...nel.org>, Alexander Viro <viro@...iv.linux.org.uk>, 
 Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
 Joel Granados <joel.granados@...nel.org>
Subject: [PATCH 2/7] sysctl: clarify proc_douintvec_minmax doc

Specify that the range check is only when assigning kernel variable

Signed-off-by: Joel Granados <joel.granados@...nel.org>
---
 kernel/sysctl.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 84ca24fb1965e97dc9e6f71f42a6c99c01aca3ee..e82716b7c13840cadc3b19a7c9d05b167abebcf6 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -692,10 +692,10 @@ int proc_dointvec_minmax(const struct ctl_table *table, int dir,
  * values from/to the user buffer, treated as an ASCII string. Negative
  * strings are not allowed.
  *
- * This routine will ensure the values are within the range specified by
- * table->extra1 (min) and table->extra2 (max). There is a final sanity
- * check for UINT_MAX to avoid having to support wrap around uses from
- * userspace.
+ * When changing the kernel variable, this routine will ensure the values
+ * are within the range specified by table->extra1 (min) and table->extra2
+ * (max). And Check that the values are less than UINT_MAX to avoid having to
+ * support wrap around uses from userspace.
  *
  * Returns 0 on success or -ERANGE when range check failes and
  * SYSCTL_USER_TO_KERN(dir) == true

-- 
2.50.1