linux-kernel - Re: [PATCH] ax25: Fix NULL pointer dereference in ax25_kill_by

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Message-Id: <164683021074.2371.639793018206811147.git-patchwork-notify@kernel.org>
Date:   Wed, 09 Mar 2022 12:50:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Duoming Zhou <duoming@....edu.cn>
Cc:     linux-hams@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kuba@...nel.org, davem@...emloft.net,
        ralf@...ux-mips.org, jreuter@...na.de
Subject: Re: [PATCH] ax25: Fix NULL pointer dereference in ax25_kill_by_device

Hello:

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

On Tue,  8 Mar 2022 16:12:23 +0800 you wrote:
> When two ax25 devices attempted to establish connection, the requester use ax25_create(),
> ax25_bind() and ax25_connect() to initiate connection. The receiver use ax25_rcv() to
> accept connection and use ax25_create_cb() in ax25_rcv() to create ax25_cb, but the
> ax25_cb->sk is NULL. When the receiver is detaching, a NULL pointer dereference bug
> caused by sock_hold(sk) in ax25_kill_by_device() will happen. The corresponding
> fail log is shown below:
> 
> [...]

Here is the summary with links:
  - ax25: Fix NULL pointer dereference in ax25_kill_by_device
    https://git.kernel.org/netdev/net/c/71171ac8eb34

You are awesome, thank you!
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