linux-kernel - Re: [PATCH net-next] netpoll: Fix race condition in netpoll_owner

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Date: Wed, 01 May 2024 02:10:32 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Breno Leitao <leitao@...ian.org>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, leit@...a.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] netpoll: Fix race condition in netpoll_owner_active

Hello:

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

On Mon, 29 Apr 2024 03:04:33 -0700 you wrote:
> KCSAN detected a race condition in netpoll:
> 
> 	BUG: KCSAN: data-race in net_rx_action / netpoll_send_skb
> 	write (marked) to 0xffff8881164168b0 of 4 bytes by interrupt on cpu 10:
> 	net_rx_action (./include/linux/netpoll.h:90 net/core/dev.c:6712 net/core/dev.c:6822)
> <snip>
> 	read to 0xffff8881164168b0 of 4 bytes by task 1 on cpu 2:
> 	netpoll_send_skb (net/core/netpoll.c:319 net/core/netpoll.c:345 net/core/netpoll.c:393)
> 	netpoll_send_udp (net/core/netpoll.c:?)
> <snip>
> 	value changed: 0x0000000a -> 0xffffffff
> 
> [...]

Here is the summary with links:
  - [net-next] netpoll: Fix race condition in netpoll_owner_active
    https://git.kernel.org/netdev/net-next/c/c2e6a872bde9

You are awesome, thank you!
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