netdev - Re: [PATCH bpf 0/2] selftests: bpf: more sub-register zero extension unit tests

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Date:   Wed, 29 May 2019 14:59:46 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jiong Wang <jiong.wang@...ronome.com>, alexei.starovoitov@...il.com
Cc:     bjorn.topel@...el.com, bpf@...r.kernel.org, netdev@...r.kernel.org,
        oss-drivers@...ronome.com
Subject: Re: [PATCH bpf 0/2] selftests: bpf: more sub-register zero extension
 unit tests

On 05/29/2019 11:57 AM, Jiong Wang wrote:
> JIT back-ends need to guarantee high 32-bit cleared whenever one eBPF insn
> write low 32-bit sub-register only. It is possible that some JIT back-ends
> have failed doing this and are silently generating wrong image.
> 
> This set completes the unit tests, so bug on this could be exposed.
> 
> Jiong Wang (2):
>   selftests: bpf: move sub-register zero extension checks into subreg.c
>   selftests: bpf: complete sub-register zero extension checks
> 
>  tools/testing/selftests/bpf/verifier/basic_instr.c |  39 --
>  tools/testing/selftests/bpf/verifier/subreg.c      | 533 +++++++++++++++++++++
>  2 files changed, 533 insertions(+), 39 deletions(-)
>  create mode 100644 tools/testing/selftests/bpf/verifier/subreg.c

Looks good, thanks for following up! Applied, thanks!