From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/mm/usercopy.c | 13 ++++++-------
1 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/kernel/mm/usercopy.c b/kernel/mm/usercopy.c
index e81d117..540968b 100644
--- a/kernel/mm/usercopy.c
+++ b/kernel/mm/usercopy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* This implements the various checks for CONFIG_HARDENED_USERCOPY*,
* which are designed to protect kernel memory from needless exposure
@@ -6,11 +7,6 @@
*
* Copyright (C) 2001-2016 PaX Team, Bradley Spengler, Open Source
* Security Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -47,7 +43,7 @@
/*
* Reject: object partially overlaps the stack (passing the
- * the check above means at least one end is within the stack,
+ * check above means at least one end is within the stack,
* so if this check fails, the other end is outside the stack).
*/
if (obj < stack || stackend < obj + len)
@@ -298,7 +294,10 @@
static int __init parse_hardened_usercopy(char *str)
{
- return strtobool(str, &enable_checks);
+ if (strtobool(str, &enable_checks))
+ pr_warn("Invalid option string for hardened_usercopy: '%s'\n",
+ str);
+ return 1;
}
__setup("hardened_usercopy=", parse_hardened_usercopy);
--
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