netdev - Re: [PATCH net] tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN

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Message-Id: 
 <171470222917.28714.1735864391101159950.git-patchwork-notify@kernel.org>
Date: Fri, 03 May 2024 02:10:29 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
 ncardwell@...gle.com, ycheng@...gle.com, kuniyu@...zon.com,
 netdev@...r.kernel.org, eric.dumazet@...il.com, syzkaller@...glegroups.com
Subject: Re: [PATCH net] tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV
 sockets

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Wed,  1 May 2024 12:54:48 +0000 you wrote:
> TCP_SYN_RECV state is really special, it is only used by
> cross-syn connections, mostly used by fuzzers.
> 
> In the following crash [1], syzbot managed to trigger a divide
> by zero in tcp_rcv_space_adjust()
> 
> A socket makes the following state transitions,
> without ever calling tcp_init_transfer(),
> meaning tcp_init_buffer_space() is also not called.
> 
> [...]

Here is the summary with links:
  - [net] tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets
    https://git.kernel.org/netdev/net/c/94062790aedb

You are awesome, thank you!
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