linux-kernel - Re: [PATCH] platform/chrome: cros_ec

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Date: Wed, 24 Apr 2024 08:51:50 +0000
From: patchwork-bot+chrome-platform@...nel.org
To: Noah Loomans <noah@...hloomans.com>
Cc: bhanumaiya@...omium.org, bleung@...omium.org, tzungbi@...nel.org,
 groeck@...omium.org, robertzieba@...gle.com, chrome-platform@...ts.linux.dev,
 linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] platform/chrome: cros_ec_uart: properly fix race condition

Hello:

This patch was applied to chrome-platform/linux.git (for-kernelci)
by Tzung-Bi Shih <tzungbi@...nel.org>:

On Wed, 10 Apr 2024 20:26:19 +0200 you wrote:
> The cros_ec_uart_probe() function calls devm_serdev_device_open() before
> it calls serdev_device_set_client_ops(). This can trigger a NULL pointer
> dereference:
> 
>     BUG: kernel NULL pointer dereference, address: 0000000000000000
>     ...
>     CPU: 5 PID: 103 Comm: kworker/u16:3 Not tainted 6.8.4-zen1-1-zen #1 4a88f2661038c2a3bb69aa70fb41a5735338823c
>     Hardware name: Google Morphius/Morphius, BIOS MrChromebox-4.22.2-1-g2a93624aebf 01/22/2024
>     Workqueue: events_unbound flush_to_ldisc
>     RIP: 0010:ttyport_receive_buf+0x3f/0xf0
>     ...
>     Call Trace:
>      <TASK>
>      ? __die+0x10f/0x120
>      ? page_fault_oops+0x171/0x4e0
>      ? srso_return_thunk+0x5/0x5f
>      ? exc_page_fault+0x7f/0x180
>      ? asm_exc_page_fault+0x26/0x30
>      ? ttyport_receive_buf+0x3f/0xf0
>      flush_to_ldisc+0x9b/0x1c0
>      process_one_work+0x17b/0x340
>      worker_thread+0x301/0x490
>      ? __pfx_worker_thread+0x10/0x10
>      kthread+0xe8/0x120
>      ? __pfx_kthread+0x10/0x10
>      ret_from_fork+0x34/0x50
>      ? __pfx_kthread+0x10/0x10
>      ret_from_fork_asm+0x1b/0x30
>      </TASK>
> 
> [...]

Here is the summary with links:
  - platform/chrome: cros_ec_uart: properly fix race condition
    https://git.kernel.org/chrome-platform/c/5e700b384ec1

You are awesome, thank you!
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