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