netdev - Re: [PATCH RFC v4 net-next 00/26] BPF syscall, maps, verifier, samples, llvm

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Message-ID: <CAMEtUuxxEvQWHKTrTDazd3RaeYC1_-_CvAyL+GFpMVDKBPi32A@mail.gmail.com>
Date:	Wed, 13 Aug 2014 11:00:24 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	David Laight <David.Laight@...lab.com>,
	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Daniel Borkmann <dborkman@...hat.com>,
	Chema Gonzalez <chema@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC v4 net-next 00/26] BPF syscall, maps, verifier,
 samples, llvm

On Wed, Aug 13, 2014 at 10:40 AM, Andy Lutomirski <luto@...capital.net> wrote:
>
> But don't you need some kind of detection anyway to handle the case
> where something jumps to the middle of the "load 64-bit immediate"?  I

added few test cases to test_verifier to see that this case is caught
and it looks ok, but you got me worried. May be few more checks needed.
Thanks!
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