linux-kernel - Re: [PATCH v8 1/8] sk_run_filter: add support for custom load

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Date:	Thu, 16 Feb 2012 17:54:48 -0800
From:	Joe Perches <joe@...ches.com>
To:	Will Drewry <wad@...omium.org>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	linux-doc@...r.kernel.org, kernel-hardening@...ts.openwall.org,
	netdev@...r.kernel.org, x86@...nel.org, arnd@...db.de,
	davem@...emloft.net, hpa@...or.com, mingo@...hat.com,
	oleg@...hat.com, peterz@...radead.org, rdunlap@...otime.net,
	mcgrathr@...omium.org, tglx@...utronix.de, luto@....edu,
	eparis@...hat.com, serge.hallyn@...onical.com, djm@...drot.org,
	scarybeasts@...il.com, indan@....nu, pmoore@...hat.com,
	akpm@...ux-foundation.org, corbet@....net, eric.dumazet@...il.com,
	markus@...omium.org, keescook@...omium.org
Subject: Re: [PATCH v8 1/8] sk_run_filter: add support for custom
 load_pointer

On Thu, 2012-02-16 at 14:02 -0600, Will Drewry wrote:
> This change allows CONFIG_SECCOMP to make use of BPF programs for
> user-controlled system call filtering (as shown in this patch series).
[]
> diff --git a/net/core/filter.c b/net/core/filter.c
[]
> @@ -542,9 +602,35 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
[]
>  		case BPF_S_LD_W_ABS:
> +			MAYBE_USE_LOAD_FN(LD_W_ABS);
>  		case BPF_S_LD_H_ABS:
> +			MAYBE_USE_LOAD_FN(LD_H_ABS);
>  		case BPF_S_LD_B_ABS:
> +			MAYBE_USE_LOAD_FN(LD_B_ABS);

Would be nice to note fallthrough or add break if necessary.


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