Re: [PATCH] fix: accel/qaic: qaic_attach_slice_bo_ioctl: success path missing drm_gem_object_put

[WenTao Liang]

> 2026年6月26日 19:43，WenTao Liang <vulab@xxxxxxxxxxx> 写道：
> 
> drm_gem_object_lookup() acquires a GEM object reference on success. All
>  error paths correctly release it via put_bo, but the success path returns
>  without calling drm_gem_object_put(obj). Since list_add_tail does not
>  transfer ownership, the GEM object reference is permanently leaked on
>  each successful call.
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 75af0a585af9 ("accel/qaic: Grab ch_lock during QAIC_ATTACH_SLICE_BO")
> Signed-off-by: WenTao Liang <vulab@xxxxxxxxxxx>
> ---
> drivers/accel/qaic/qaic_data.c | 1 +
> 1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/accel/qaic/qaic_data.c b/drivers/accel/qaic/qaic_data.c
> index 1e4c579d2725..b17df7bf565d 100644
> --- a/drivers/accel/qaic/qaic_data.c
> +++ b/drivers/accel/qaic/qaic_data.c
> @@ -1084,6 +1084,7 @@ int qaic_attach_slice_bo_ioctl(struct drm_device *dev, void *data, struct drm_fi
> 
> 	bo->sliced = true;
> 	list_add_tail(&bo->bo_list, &bo->dbc->bo_lists);
> +	drm_gem_object_put(obj);
> 	srcu_read_unlock(&dbc->ch_lock, rcu_id);
> 	mutex_unlock(&bo->lock);
> 	kfree(slice_ent);
> -- 
> 2.39.5 (Apple Git-154)

Please ignore this patch. I will resend a proper version after
learning the kernel submission process.

Apologies for the noise.

Best regards,
WenTao Liang