linux-kernel - Re: [PATCH] Bluetooth: Avoid potential use-after-free in hci_error

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Message-Id: 
 <170440682632.8457.15681827016026801324.git-patchwork-notify@kernel.org>
Date: Thu, 04 Jan 2024 22:20:26 +0000
From: patchwork-bot+bluetooth@...nel.org
To: Ying Hsu <yinghsu@...omium.org>
Cc: linux-bluetooth@...r.kernel.org, luiz.dentz@...il.com,
 linux-kernel@...r.kernel.org, chromeos-bluetooth-upstreaming@...omium.org
Subject: Re: [PATCH] Bluetooth: Avoid potential use-after-free in hci_error_reset

Hello:

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

On Thu,  4 Jan 2024 11:56:32 +0000 you wrote:
> While handling the HCI_EV_HARDWARE_ERROR event, if the underlying
> BT controller is not responding, the GPIO reset mechanism would
> free the hci_dev and lead to a use-after-free in hci_error_reset.
> 
> Here's the call trace observed on a ChromeOS device with Intel AX201:
>    queue_work_on+0x3e/0x6c
>    __hci_cmd_sync_sk+0x2ee/0x4c0 [bluetooth <HASH:3b4a6>]
>    ? init_wait_entry+0x31/0x31
>    __hci_cmd_sync+0x16/0x20 [bluetooth <HASH:3b4a 6>]
>    hci_error_reset+0x4f/0xa4 [bluetooth <HASH:3b4a 6>]
>    process_one_work+0x1d8/0x33f
>    worker_thread+0x21b/0x373
>    kthread+0x13a/0x152
>    ? pr_cont_work+0x54/0x54
>    ? kthread_blkcg+0x31/0x31
>     ret_from_fork+0x1f/0x30
> 
> [...]

Here is the summary with links:
  - Bluetooth: Avoid potential use-after-free in hci_error_reset
    https://git.kernel.org/bluetooth/bluetooth-next/c/c6d011a4e7d3

You are awesome, thank you!
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