netdev - Re: [PATCH net-next 4/4] seccomp, filter: add and use bpf_prog_create_from

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Message-ID: <554A316D.6070305@plumgrid.com>
Date:	Wed, 06 May 2015 08:21:17 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Daniel Borkmann <daniel@...earbox.net>, davem@...emloft.net
CC:	keescook@...omium.org, nschichan@...ebox.fr, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 4/4] seccomp, filter: add and use bpf_prog_create_from_user
 from seccomp

On 5/6/15 7:12 AM, Daniel Borkmann wrote:
> Seccomp has always been a special candidate when it comes to preparation
> of its filters in seccomp_prepare_filter(). Due to the extra checks and
> filter rewrite it partially duplicates code and has BPF internals exposed.
>
> This patch adds a generic API inside the BPF code code that seccomp can use
> and thus keep it's filter preparation code minimal and better maintainable.
> The other side-effect is that now classic JITs can add seccomp support as
> well by only providing a BPF_LDX | BPF_W | BPF_ABS translation.
>
> Tested with seccomp and BPF test suites.
>
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
> Cc: Nicolas Schichan <nschichan@...ebox.fr>
> Cc: Alexei Starovoitov <ast@...mgrid.com>
> Cc: Kees Cook <keescook@...omium.org>

Acked-by: Alexei Starovoitov <ast@...mgrid.com>

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