From mboxrd@z Thu Jan 1 00:00:00 1970 From: jlee@suse.com (joeyli) Date: Fri, 20 Oct 2017 14:45:43 +0800 Subject: [PATCH 15/27] acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down In-Reply-To: <150842474713.7923.4851355698276917280.stgit@warthog.procyon.org.uk> References: <150842463163.7923.11081723749106843698.stgit@warthog.procyon.org.uk> <150842474713.7923.4851355698276917280.stgit@warthog.procyon.org.uk> Message-ID: <20171020064543.GW3285@linux-l9pv.suse> To: linux-security-module@vger.kernel.org List-Id: linux-security-module.vger.kernel.org On Thu, Oct 19, 2017 at 03:52:27PM +0100, David Howells wrote: > From: Josh Boyer > > This option allows userspace to pass the RSDP address to the kernel, which > makes it possible for a user to modify the workings of hardware . Reject > the option when the kernel is locked down. > > Signed-off-by: Josh Boyer > Signed-off-by: David Howells I have reviewed this patch. Please feel free to add: Reviewed-by: "Lee, Chun-Yi" Thanks! Joey Lee > cc: Dave Young > cc: linux-acpi at vger.kernel.org > --- > > drivers/acpi/osl.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c > index db78d353bab1..36c6527c1b0a 100644 > --- a/drivers/acpi/osl.c > +++ b/drivers/acpi/osl.c > @@ -192,7 +192,7 @@ acpi_physical_address __init acpi_os_get_root_pointer(void) > acpi_physical_address pa = 0; > > #ifdef CONFIG_KEXEC > - if (acpi_rsdp) > + if (acpi_rsdp && !kernel_is_locked_down("ACPI RSDP specification")) > return acpi_rsdp; > #endif > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-efi" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html