Re: [PATCH v2 1/2] Revert "thermal/drivers/hwmon: Cleanup coding style a bit"

[Lukasz Luba <lukasz.luba@arm.com>]

On 8/4/26 21:09, Rafael J. Wysocki wrote:
> From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
> 
> Revert commit 030a48b0f6ce ("thermal/drivers/hwmon: Cleanup coding style
> a bit") that introduced a use-after-free into the error path of
> thermal_add_hwmon_sysfs() by removing a valid check from it.
> 
> Link: https://lore.kernel.org/linux-hwmon/20260803183915.4ED7D1F000E9@smtp.kernel.org/
> Cc: All applicable <stable@vger.kernel.org>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
>   drivers/thermal/thermal_hwmon.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/thermal_hwmon.c b/drivers/thermal/thermal_hwmon.c
> index 597c33c8a555..ec73d03a1e60 100644
> --- a/drivers/thermal/thermal_hwmon.c
> +++ b/drivers/thermal/thermal_hwmon.c
> @@ -212,7 +212,8 @@ int thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
>   	if (new_hwmon_device)
>   		hwmon_device_unregister(hwmon->device);
>    free_mem:
> -	kfree(hwmon);
> +	if (new_hwmon_device)
> +		kfree(hwmon);
>   
>   	return result;
>   }

LGTM, a tricky plumbing. I'm sorry for being late with review.

Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>