Commit a257e818 authored by Boris Brezillon's avatar Boris Brezillon
Browse files

drm/panthor: Reset the FW VM to NULL on unplug 



This way get NULL derefs instead of use-after-free if the FW VM is
referenced after the device has been unplugged.

Signed-off-by: default avatarBoris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: default avatarSteven Price <steven.price@arm.com>
Acked-by: default avatarLiviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240502183813.1612017-4-boris.brezillon@collabora.com
parent ff60c8da

drivers/gpu/drm/panthor/panthor_fw.c

+1 −0
Original line number Diff line number Diff line
@@ -1142,6 +1142,7 @@ void panthor_fw_unplug(struct panthor_device *ptdev) 
	 * state to keep the active_refcnt balanced.

	 */

	panthor_vm_put(ptdev->fw->vm);

	ptdev->fw->vm = NULL;



	panthor_gpu_power_off(ptdev, L2, ptdev->gpu_info.l2_present, 20000);

}