write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/mm/usercopy.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * This implements the various checks for CONFIG_HARDENED_USERCOPY*,
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  * which are designed to protect kernel memory from needless exposure
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@@ -6,11 +7,6 @@
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  *
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  * Copyright (C) 2001-2016 PaX Team, Bradley Spengler, Open Source
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  * Security Inc.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -47,7 +43,7 @@
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 	/*
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 	 * Reject: object partially overlaps the stack (passing the
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-	 * the check above means at least one end is within the stack,
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+	 * check above means at least one end is within the stack,
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 	 * so if this check fails, the other end is outside the stack).
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 	 */
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 	if (obj < stack || stackend < obj + len)
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@@ -298,7 +294,10 @@
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 static int __init parse_hardened_usercopy(char *str)
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 {
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-	return strtobool(str, &enable_checks);
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+	if (strtobool(str, &enable_checks))
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+		pr_warn("Invalid option string for hardened_usercopy: '%s'\n",
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+			str);
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+	return 1;
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 }
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 __setup("hardened_usercopy=", parse_hardened_usercopy);