>From 145913d656bfe8216032b38a576ac150699521e5 Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@xxxxxxxxxx>
Date: Mon, 19 Aug 2013 13:26:08 -0400
Subject: [PATCH 07/13] acpi: Ignore acpi_rsdp kernel parameter when module
loading is restricted
This option allows userspace to pass the RSDP address to the kernel, which
makes it possible for a user to circumvent any restrictions imposed on
loading modules. Disable it in that case.
Signed-off-by: Josh Boyer <jwboyer@xxxxxxxxxx>
---
drivers/acpi/osl.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 6ab2c35..e4c4410 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -45,6 +45,7 @@
#include <linux/list.h>
#include <linux/jiffies.h>
#include <linux/semaphore.h>
+#include <linux/module.h>
#include <asm/io.h>
#include <asm/uaccess.h>
@@ -245,7 +246,7 @@ early_param("acpi_rsdp", setup_acpi_rsdp);
acpi_physical_address __init acpi_os_get_root_pointer(void)
{
#ifdef CONFIG_KEXEC
- if (acpi_rsdp)
+ if (acpi_rsdp && !secure_modules())
return acpi_rsdp;
#endif
--
1.8.3.1
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