linux-kernel - Re: [PATCH net v2] af_unix: Fix data races in unix_release_sock/unix_stream

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Date: Sat, 11 May 2024 02:30:33 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Breno Leitao <leitao@...ian.org>
Cc: kuniyu@...zon.com, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org, horms@...nel.org,
 paulmck@...nel.org, dhowells@...hat.com, alexander@...alicyn.com,
 john.fastabend@...il.com, daan.j.demeyer@...il.com,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] af_unix: Fix data races in
 unix_release_sock/unix_stream_sendmsg

Hello:

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

On Thu,  9 May 2024 01:14:46 -0700 you wrote:
> A data-race condition has been identified in af_unix. In one data path,
> the write function unix_release_sock() atomically writes to
> sk->sk_shutdown using WRITE_ONCE. However, on the reader side,
> unix_stream_sendmsg() does not read it atomically. Consequently, this
> issue is causing the following KCSAN splat to occur:
> 
> 	BUG: KCSAN: data-race in unix_release_sock / unix_stream_sendmsg
> 
> [...]

Here is the summary with links:
  - [net,v2] af_unix: Fix data races in unix_release_sock/unix_stream_sendmsg
    https://git.kernel.org/netdev/net/c/540bf24fba16

You are awesome, thank you!
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