netdev - Re: [PATCH v2 bpf-next 0/3] bpf: Pointers beyond packet end.

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Date:   Fri, 13 Nov 2020 00:50:23 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     davem@...emloft.net, daniel@...earbox.net, netdev@...r.kernel.org,
        bpf@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH v2 bpf-next 0/3] bpf: Pointers beyond packet end.

Hello:

This series was applied to bpf/bpf-next.git (refs/heads/master):

On Tue, 10 Nov 2020 19:12:10 -0800 you wrote:
> From: Alexei Starovoitov <ast@...nel.org>
> 
> v1->v2:
> - removed set-but-unused variable.
> - added Jiri's Tested-by.
> 
> In some cases LLVM uses the knowledge that branch is taken to optimze the code
> which causes the verifier to reject valid programs.
> Teach the verifier to recognize that
> r1 = skb->data;
> r1 += 10;
> r2 = skb->data_end;
> if (r1 > r2) {
>   here r1 points beyond packet_end and subsequent
>   if (r1 > r2) // always evaluates to "true".
> }
> 
> [...]

Here is the summary with links:
  - [v2,bpf-next,1/3] bpf: Support for pointers beyond pkt_end.
    https://git.kernel.org/bpf/bpf-next/c/6d94e741a8ff
  - [v2,bpf-next,2/3] selftests/bpf: Add skb_pkt_end test
    https://git.kernel.org/bpf/bpf-next/c/9cc873e85800
  - [v2,bpf-next,3/3] selftests/bpf: Add asm tests for pkt vs pkt_end comparison.
    https://git.kernel.org/bpf/bpf-next/c/cb62d34019d9

You are awesome, thank you!
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