From: patchwork-bot+netdevbpf@kernel.org
To: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Cc: bpf@vger.kernel.org, daniel@iogearbox.net, toke@redhat.com
Subject: Re: [PATCH] bpf: selftests: test_verifier: mask bpf_csum_diff() return value to 16 bits
Date: Tue, 02 Mar 2021 10:50:06 +0000 [thread overview]
Message-ID: <161468220671.25431.2892545906043923234.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20210228103017.320240-1-yauheni.kaliuta@redhat.com>
Hello:
This patch was applied to bpf/bpf.git (refs/heads/master):
On Sun, 28 Feb 2021 12:30:17 +0200 you wrote:
> The verifier test labelled "valid read map access into a read-only array
> 2" calls the bpf_csum_diff() helper and checks its return value.
> However, architecture implementations of csum_partial() (which is what
> the helper uses) differ in whether they fold the return value to 16 bit
> or not. For example, x86 version has:
>
> if (unlikely(odd)) {
> result = from32to16(result);
> result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
> }
>
> [...]
Here is the summary with links:
- bpf: selftests: test_verifier: mask bpf_csum_diff() return value to 16 bits
https://git.kernel.org/bpf/bpf/c/cf14da96aa18
You are awesome, thank you!
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prev parent reply other threads:[~2021-03-03 3:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-28 10:30 [PATCH] bpf: selftests: test_verifier: mask bpf_csum_diff() return value to 16 bits Yauheni Kaliuta
2021-03-01 5:18 ` Yonghong Song
2021-03-02 11:14 ` Daniel Borkmann
2021-03-02 10:50 ` patchwork-bot+netdevbpf [this message]
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