From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: [PATCH V3 07/11] acpi: Ignore acpi_rsdp kernel parameter when module loading is restricted Date: Tue, 3 Sep 2013 19:50:14 -0400 Message-ID: <1378252218-18798-8-git-send-email-matthew.garrett@nebula.com> References: <1378252218-18798-1-git-send-email-matthew.garrett@nebula.com> Return-path: In-Reply-To: <1378252218-18798-1-git-send-email-matthew.garrett-05XSO3Yj/JvQT0dZR+AlfA@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org, hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org, Josh Boyer List-Id: linux-efi@vger.kernel.org From: Josh Boyer 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 --- 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 #include #include +#include #include #include @@ -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