On 10/3/24 13:27, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> The object pointed to by tz->tzp may still be accessed after being
> freed in thermal_zone_device_unregister(), so move the freeing of it
> to the point after the removal completion has been completed at which
> it cannot be accessed any more.
>
> Fixes: 3d439b1a2ad3 ("thermal/core: Alloc-copy-free the thermal zone parameters structure")
> Cc: 6.8+ <stable@vger.kernel.org> # 6.8+
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
>
> v1 -> v2: No changes
>
> ---
> drivers/thermal/thermal_core.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> Index: linux-pm/drivers/thermal/thermal_core.c
> ===================================================================
> --- linux-pm.orig/drivers/thermal/thermal_core.c
> +++ linux-pm/drivers/thermal/thermal_core.c
> @@ -1606,14 +1606,12 @@ void thermal_zone_device_unregister(stru
> ida_destroy(&tz->ida);
>
> device_del(&tz->device);
> -
> - kfree(tz->tzp);
> -
> put_device(&tz->device);
>
> thermal_notify_tz_delete(tz);
>
> wait_for_completion(&tz->removal);
> + kfree(tz->tzp);
> kfree(tz);
> }
> EXPORT_SYMBOL_GPL(thermal_zone_device_unregister);
>
>
>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>