I think it makes sense to add a Fixes tag to this:
Fixes: 822cab6150d3 ("drm/nouveau/svm: check for SVM initialized
before migrating")
Reviewed-by: Karol Herbst
On Tue, Sep 7, 2021 at 3:20 PM Chenyuan Mi wrote:
>
> The reference counting issue happens in one exception handling path of
> nouveau
The reference counting issue happens in one exception handling path of
nouveau_svmm_bind(). When cli->svm.svmm is null, the function forgets
to decrease the refcount of mm increased by get_task_mm(), causing a
refcount leak.
Fix this issue by using mmput() to decrease the refcount in the
exception
