From: Matt Fleming <matt@console-pimps.org>
To: Matthew Garrett <matthew.garrett@nebula.com>
Cc: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
keescook@chromium.org, hpa@zytor.com
Subject: Re: [PATCH V3 11/11] Add option to automatically enforce module signatures when in Secure Boot mode
Date: Thu, 5 Sep 2013 11:16:49 +0100 [thread overview]
Message-ID: <20130905101649.GL28598@console-pimps.org> (raw)
In-Reply-To: <1378252218-18798-12-git-send-email-matthew.garrett@nebula.com>
On Tue, 03 Sep, at 07:50:18PM, Matthew Garrett wrote:
> UEFI Secure Boot provides a mechanism for ensuring that the firmware will
> only load signed bootloaders and kernels. Certain use cases may also
> require that all kernel modules also be signed. Add a configuration option
> that enforces this automatically when enabled.
>
> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
> ---
> Documentation/x86/zero-page.txt | 2 ++
> arch/x86/Kconfig | 10 ++++++++++
> arch/x86/boot/compressed/eboot.c | 36 +++++++++++++++++++++++++++++++++++
> arch/x86/include/uapi/asm/bootparam.h | 3 ++-
> arch/x86/kernel/setup.c | 6 ++++++
> include/linux/module.h | 6 ++++++
> kernel/module.c | 7 +++++++
> 7 files changed, 69 insertions(+), 1 deletion(-)
[...]
> @@ -1129,6 +1129,12 @@ void __init setup_arch(char **cmdline_p)
>
> io_delay_init();
>
> +#ifdef CONFIG_EFI_SECURE_BOOT_SIG_ENFORCE
> + if (boot_params.secure_boot) {
> + enforce_signed_modules();
> + }
> +#endif
> +
I'd advise checking efi_enabled(EFI_BOOT) along with .secure_boot to
guard against garbage values in boot_params.
--
Matt Fleming, Intel Open Source Technology Center
next prev parent reply other threads:[~2013-09-05 10:16 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-03 23:50 Matthew Garrett
2013-09-03 23:50 ` [PATCH V3 01/11] Add secure_modules() call Matthew Garrett
2013-09-04 0:45 ` James Morris
2013-09-05 2:14 ` joeyli
2013-09-03 23:50 ` [PATCH V3 02/11] PCI: Lock down BAR access when module security is enabled Matthew Garrett
2013-09-04 0:45 ` James Morris
2013-09-04 16:57 ` David Woodhouse
2013-09-04 17:04 ` Matthew Garrett
2013-09-04 18:58 ` David Woodhouse
2013-09-04 19:01 ` Matthew Garrett
2013-09-04 19:31 ` David Woodhouse
2013-09-03 23:50 ` [PATCH V3 03/11] x86: Lock down IO port " Matthew Garrett
2013-09-04 0:45 ` James Morris
2013-09-05 3:52 ` H. Peter Anvin
2013-09-05 3:58 ` Matthew Garrett
2013-09-05 15:36 ` H. Peter Anvin
2013-09-03 23:50 ` [PATCH V3 04/11] ACPI: Limit access to custom_method Matthew Garrett
2013-09-04 0:46 ` James Morris
2013-09-03 23:50 ` [PATCH V3 05/11] asus-wmi: Restrict debugfs interface when module loading is restricted Matthew Garrett
2013-09-04 0:46 ` James Morris
2013-09-03 23:50 ` [PATCH V3 06/11] Restrict /dev/mem and /dev/kmem " Matthew Garrett
2013-09-04 0:47 ` James Morris
2013-09-03 23:50 ` [PATCH V3 07/11] acpi: Ignore acpi_rsdp kernel parameter " Matthew Garrett
2013-09-03 23:50 ` [PATCH V3 08/11] kexec: Disable at runtime if the kernel enforces module loading restrictions Matthew Garrett
2013-09-04 0:48 ` James Morris
2013-09-04 20:09 ` jerry.hoemann
2013-09-04 20:12 ` Matthew Garrett
2013-09-04 20:14 ` Josh Boyer
2013-09-08 6:40 ` Greg KH
2013-09-08 6:44 ` Matthew Garrett
2013-09-08 7:24 ` Greg KH
2013-09-08 14:40 ` Matthew Garrett
2013-09-08 15:51 ` Kees Cook
2013-09-08 16:18 ` Greg KH
2013-09-08 16:24 ` Matthew Garrett
2013-09-08 16:39 ` Greg KH
2013-09-08 16:59 ` Matthew Garrett
2013-09-08 17:22 ` Greg KH
2013-09-08 17:25 ` Matthew Garrett
2013-09-08 17:11 ` James Bottomley
2013-09-08 17:15 ` Matthew Garrett
2013-09-08 17:22 ` James Bottomley
2013-09-08 17:27 ` Matthew Garrett
2013-09-08 17:32 ` James Bottomley
2013-09-08 17:38 ` Matthew Garrett
2013-09-03 23:50 ` [PATCH V3 09/11] uswsusp: Disable when module loading is restricted Matthew Garrett
2013-09-04 0:48 ` James Morris
2013-09-05 3:20 ` joeyli
2013-09-03 23:50 ` [PATCH V3 10/11] x86: Restrict MSR access " Matthew Garrett
2013-09-04 0:49 ` James Morris
2013-09-03 23:50 ` [PATCH V3 11/11] Add option to automatically enforce module signatures when in Secure Boot mode Matthew Garrett
2013-09-04 1:42 ` James Morris
2013-09-04 1:42 ` Matthew Garrett
2013-09-05 3:13 ` joeyli
2013-09-05 8:24 ` joeyli
2013-09-05 10:16 ` Matt Fleming [this message]
2013-09-05 12:54 ` Matthew Garrett
2013-09-04 15:53 ` Kees Cook
2013-09-04 16:05 ` Re: Josh Boyer
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