netdev - Re: [PATCH] Bluetooth: L2CAP: fix use-after-free in l2cap_conn

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Message-Id: <166603861674.10129.97922978333278137.git-patchwork-notify@kernel.org>
Date:   Mon, 17 Oct 2022 20:30:16 +0000
From:   patchwork-bot+bluetooth@...nel.org
To:     Zhengchao Shao <shaozhengchao@...wei.com>
Cc:     linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, marcel@...tmann.org, johan.hedberg@...il.com,
        luiz.dentz@...il.com, weiyongjun1@...wei.com, yuehaibing@...wei.com
Subject: Re: [PATCH] Bluetooth: L2CAP: fix use-after-free in l2cap_conn_del()

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@...el.com>:

On Mon, 17 Oct 2022 15:58:13 +0800 you wrote:
> When l2cap_recv_frame() is invoked to receive data, and the cid is
> L2CAP_CID_A2MP, if the channel does not exist, it will create a channel.
> However, after a channel is created, the hold operation of the channel
> is not performed. In this case, the value of channel reference counting
> is 1. As a result, after hci_error_reset() is triggered, l2cap_conn_del()
> invokes the close hook function of A2MP to release the channel. Then
>  l2cap_chan_unlock(chan) will trigger UAF issue.
> 
> [...]

Here is the summary with links:
  - Bluetooth: L2CAP: fix use-after-free in l2cap_conn_del()
    https://git.kernel.org/bluetooth/bluetooth-next/c/42cf46dea905

You are awesome, thank you!
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