linux-kernel - Re: [PATCH V2 01/10] Secure boot: Add new capability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1350692142.14835.46.camel@linux-s257.site>
Date:	Sat, 20 Oct 2012 08:15:42 +0800
From:	joeyli <jlee@...e.com>
To:	Matt Fleming <matt.fleming@...el.com>
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org,
	Matthew Garrett <mjg@...hat.com>
Subject: Re: [PATCH V2 01/10] Secure boot: Add new capability

Hi Matt, 

Sorry for bother you!

I didn't see this Matthew's patchset merged in EFI git tree. Do you have
plan to merge it? Or those patches need wait different subsystem leaders
merge.


Thanks a lot!
Joey Lee

於 四，2012-09-20 於 10:40 -0400，Matthew Garrett 提到：
> Secure boot adds certain policy requirements, including that root must not
> be able to do anything that could cause the kernel to execute arbitrary code.
> The simplest way to handle this would seem to be to add a new capability
> and gate various functionality on that. We'll then strip it from the initial
> capability set if required.
> 
> Signed-off-by: Matthew Garrett <mjg@...hat.com>
> ---
>  include/linux/capability.h | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/capability.h b/include/linux/capability.h
> index d10b7ed..4345bc8 100644
> --- a/include/linux/capability.h
> +++ b/include/linux/capability.h
> @@ -364,7 +364,11 @@ struct cpu_vfs_cap_data {
>  
>  #define CAP_BLOCK_SUSPEND    36
>  
> -#define CAP_LAST_CAP         CAP_BLOCK_SUSPEND
> +/* Allow things that trivially permit root to modify the running kernel */
> +
> +#define CAP_COMPROMISE_KERNEL  37
> +
> +#define CAP_LAST_CAP         CAP_COMPROMISE_KERNEL
>  
>  #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
>  


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/