Re: [PATCH] platform/chrome: cros_ec_uart: properly fix race condition

Hello:

This patch was applied to chrome-platform/linux.git (for-next) by Tzung-Bi Shih tzungbi@kernel.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!