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Subject: Re: [PATCH v1] Bluetooth: af_bluetooth: Fix deadlock
From: patchwork-bot+bluetooth@kernel.org
Message-Id: 
 <170956982888.9053.11683995132686615918.git-patchwork-notify@kernel.org>
Date: Mon, 04 Mar 2024 16:30:28 +0000
References: <20240301185034.2756103-1-luiz.dentz@gmail.com>
In-Reply-To: <20240301185034.2756103-1-luiz.dentz@gmail.com>
To: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: linux-bluetooth@vger.kernel.org

Hello:

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

On Fri,  1 Mar 2024 13:50:34 -0500 you wrote:
> From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
> 
> Attemting to do sock_lock on .recvmsg may cause a deadlock as shown
> bellow, so instead of using sock_sock this uses sk_receive_queue.lock
> on bt_sock_ioctl to avoid the UAF:
> 
> INFO: task kworker/u9:1:121 blocked for more than 30 seconds.
>       Not tainted 6.7.6-lemon #183
> Workqueue: hci0 hci_rx_work
> Call Trace:
>  <TASK>
>  __schedule+0x37d/0xa00
>  schedule+0x32/0xe0
>  __lock_sock+0x68/0xa0
>  ? __pfx_autoremove_wake_function+0x10/0x10
>  lock_sock_nested+0x43/0x50
>  l2cap_sock_recv_cb+0x21/0xa0
>  l2cap_recv_frame+0x55b/0x30a0
>  ? psi_task_switch+0xeb/0x270
>  ? finish_task_switch.isra.0+0x93/0x2a0
>  hci_rx_work+0x33a/0x3f0
>  process_one_work+0x13a/0x2f0
>  worker_thread+0x2f0/0x410
>  ? __pfx_worker_thread+0x10/0x10
>  kthread+0xe0/0x110
>  ? __pfx_kthread+0x10/0x10
>  ret_from_fork+0x2c/0x50
>  ? __pfx_kthread+0x10/0x10
>  ret_from_fork_asm+0x1b/0x30
>  </TASK>
> 
> [...]

Here is the summary with links:
  - [v1] Bluetooth: af_bluetooth: Fix deadlock
    https://git.kernel.org/bluetooth/bluetooth-next/c/40245851528a

You are awesome, thank you!
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