kernel/acpi-Ignore-acpi_rsdp-kernel-parameter-when-module-l.patch
Josh Boyer e96360e192 Linux v3.17-rc7-46-g50dddff3cb9a
- Cleanup dead Kconfig symbols in config-* from Paul Bolle
2014-10-02 09:52:37 -04:00

40 lines
1.1 KiB
Diff

From 4a5679eaceb68833c45119e8c1a8bf576c8373da Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@redhat.com>
Date: Mon, 25 Jun 2012 19:57:30 -0400
Subject: [PATCH] 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@redhat.com>
---
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 3abe9b223ba7..ee8f11cf65da 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -44,6 +44,7 @@
#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
--
1.9.3