netdev - Re: [PATCH bpf 1/2] bpf: allow empty module BTFs

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Message-Id: <64ab3a61-1488-4334-8831-60e7052864d7@www.fastmail.com>
Date:   Mon, 25 Jan 2021 18:17:10 -0800
From:   "Christopher William Snowhill" <chris@...e54.net>
To:     "Andrii Nakryiko" <andrii.nakryiko@...il.com>
Cc:     patchwork-bot+netdevbpf <patchwork-bot+netdevbpf@...nel.org>,
        "Andrii Nakryiko" <andrii@...nel.org>, bpf <bpf@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        "Alexei Starovoitov" <ast@...com>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        "Kernel Team" <kernel-team@...com>
Subject: Re: [PATCH bpf 1/2] bpf: allow empty module BTFs

Aha, that was just released. Nice. I'll report this to the issue tracker where I had lodged the bpf patches for QoL use when testing rc4 and older.

On Mon, Jan 25, 2021, at 5:26 PM, Andrii Nakryiko wrote:
> On Sun, Jan 24, 2021 at 2:28 AM Christopher William Snowhill
> <chris@...e54.net> wrote:
> >
> > When is this being applied to an actual kernel? 5.11 is still quite broken without these two patches. Unless you're not using a vfat EFI partition, I guess.
> >
> 
> It's in v5.11-rc5.
> 
> > On Tue, Jan 12, 2021, at 12:20 PM, patchwork-bot+netdevbpf@...nel.org wrote:
> > > Hello:
> > >
> > > This series was applied to bpf/bpf.git (refs/heads/master):
> > >
> > > On Sat, 9 Jan 2021 23:03:40 -0800 you wrote:
> > > > Some modules don't declare any new types and end up with an empty BTF,
> > > > containing only valid BTF header and no types or strings sections. This
> > > > currently causes BTF validation error. There is nothing wrong with such BTF,
> > > > so fix the issue by allowing module BTFs with no types or strings.
> > > >
> > > > Reported-by: Christopher William Snowhill <chris@...e54.net>
> > > > Fixes: 36e68442d1af ("bpf: Load and verify kernel module BTFs")
> > > > Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
> > > >
> > > > [...]
> > >
> > > Here is the summary with links:
> > >   - [bpf,1/2] bpf: allow empty module BTFs
> > >     https://git.kernel.org/bpf/bpf/c/bcc5e6162d66
> > >   - [bpf,2/2] libbpf: allow loading empty BTFs
> > >     https://git.kernel.org/bpf/bpf/c/b8d52264df85
> > >
> > > You are awesome, thank you!
> > > --
> > > Deet-doot-dot, I am a bot.
> > > https://korg.docs.kernel.org/patchwork/pwbot.html
> > >
> > >
> > >
>