netdev - Re: [PATCH v0] ax25: NPD bug when detaching AX25 device

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Date:   Sat, 18 Dec 2021 12:40:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Lin Ma <linma@....edu.cn>
Cc:     linux-hams@...r.kernel.org, jreuter@...na.de, ralf@...ux-mips.org,
        davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
        nagi@....edu.cn
Subject: Re: [PATCH v0] ax25: NPD bug when detaching AX25 device

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@...emloft.net>:

On Fri, 17 Dec 2021 10:29:41 +0800 you wrote:
> The existing cleanup routine implementation is not well synchronized
> with the syscall routine. When a device is detaching, below race could
> occur.
> 
> static int ax25_sendmsg(...) {
>   ...
>   lock_sock()
>   ax25 = sk_to_ax25(sk);
>   if (ax25->ax25_dev == NULL) // CHECK
>   ...
>   ax25_queue_xmit(skb, ax25->ax25_dev->dev); // USE
>   ...
> }
> 
> [...]

Here is the summary with links:
  - [v0] ax25: NPD bug when detaching AX25 device
    https://git.kernel.org/netdev/net/c/1ade48d0c27d

You are awesome, thank you!
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