Re: [PATCH net-next] tcp: tcp_data_ready() must look at SOCK_DONE

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Sat, 13 Feb 2021 06:26:34 -0800 you wrote:

From: Eric Dumazet <edumazet@google.com>

My prior cleanup missed that tcp_data_ready() has to look at SOCK_DONE.
Otherwise, an application using SO_RCVLOWAT will not get EPOLLIN event
if a FIN is received in the middle of expected payload.

The reason SOCK_DONE is not examined in tcp_epollin_ready()
is that tcp_poll() catches the FIN because tcp_fin()
is also setting RCV_SHUTDOWN into sk->sk_shutdown

[...]

Here is the summary with links:
  - [net-next] tcp: tcp_data_ready() must look at SOCK_DONE
    https://git.kernel.org/netdev/net-next/c/39354eb29f59

You are awesome, thank you!
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