linux-kernel - Re: [PATCH net-next] udp6: Fix __ip6_append_data()'s handling of MSG_SPLICE

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Message-Id: <169106822109.11210.4147932489626206535.git-patchwork-notify@kernel.org>
Date:   Thu, 03 Aug 2023 13:10:21 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     David Howells <dhowells@...hat.com>
Cc:     netdev@...r.kernel.org, willemdebruijn.kernel@...il.com,
        syzbot+f527b971b4bdc8e79f9e@...kaller.appspotmail.com,
        bpf@...r.kernel.org, brauner@...nel.org, davem@...emloft.net,
        dsahern@...nel.org, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, axboe@...nel.dk, viro@...iv.linux.org.uk,
        linux-fsdevel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] udp6: Fix __ip6_append_data()'s handling of
 MSG_SPLICE_PAGES

Hello:

This patch was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Wed, 02 Aug 2023 08:36:50 +0100 you wrote:
> __ip6_append_data() can has a similar problem to __ip_append_data()[1] when
> asked to splice into a partially-built UDP message that has more than the
> frag-limit data and up to the MTU limit, but in the ipv6 case, it errors
> out with EINVAL.  This can be triggered with something like:
> 
>         pipe(pfd);
>         sfd = socket(AF_INET6, SOCK_DGRAM, 0);
>         connect(sfd, ...);
>         send(sfd, buffer, 8137, MSG_CONFIRM|MSG_MORE);
>         write(pfd[1], buffer, 8);
>         splice(pfd[0], 0, sfd, 0, 0x4ffe0ul, 0);
> 
> [...]

Here is the summary with links:
  - [net-next] udp6: Fix __ip6_append_data()'s handling of MSG_SPLICE_PAGES
    https://git.kernel.org/netdev/net-next/c/ce650a166335

You are awesome, thank you!
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