netdev - Re: [REGRESSION][PATCH] bpf_jit drops the ball on indirect negative mem references

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Message-Id: <5DA7DE7D-EF85-4EF6-9E31-5AD7D75274D8@ozlabs.org>
Date:	Fri, 30 Mar 2012 16:24:13 +0100
From:	Matt Evans <matt@...abs.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Jan Seiffert <kaffeemonster@...glemail.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [REGRESSION][PATCH] bpf_jit drops the ball on indirect negative mem references

Howdy Eric,

On 30 Mar 2012, at 15:08, Eric Dumazet <eric.dumazet@...il.com> wrote:

> On Fri, 2012-03-30 at 15:42 +0200, Jan Seiffert wrote:
> 
>> Do you know where i can ping the powerpc guys a little bit harder?
> 
> maybe using CC linux-arch@...r.kernel.org
> 
> One way to handle that would be to split this patch in 3 parts, so that
> I can Ack the non ppc part.
> 
> [1] introduce bpf_internal_load_pointer_neg_helper()
>    [BTW no need to EXPORT_SYMBOL it, since jit is not a module ]
> 
> [2] x86_bpf_iit: handle negative offsets in loads
> 
> [3] ppc_bpf_jit: handle negative offsets in loads

Yeah, that'd be great, then I can stew on it without holding you up further. 

Cheers,

Matt



> 
> 
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