# \[PATCH AUTOSEL 4.14 12/45\] drm/virtio: Fixes a potential NULL pointer dereference on probe failure - From: Sasha Levin \ - Date: 2021-07-06 11:54:32 - List: virtualization - Page: https://ratatoskr.run/virtualization/2021/07/1434329 - Thread: https://ratatoskr.run/stable/2021/07/1434302/t.md ```text From: Xie Yongji [ Upstream commit 17f46f488a5d82c5568e6e786cd760bba1c2ee09 ] The dev->dev_private might not be allocated if virtio_gpu_pci_quirk() or virtio_gpu_init() failed. In this case, we should avoid the cleanup in virtio_gpu_release(). Signed-off-by: Xie Yongji Link: http://patchwork.freedesktop.org/patch/msgid/20210517084913.403-1-xieyongji@bytedance.com Signed-off-by: Gerd Hoffmann Signed-off-by: Sasha Levin --- drivers/gpu/drm/virtio/virtgpu_kms.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c index bed450fbb216..e1a5e74f4080 100644 --- a/drivers/gpu/drm/virtio/virtgpu_kms.c +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c @@ -261,6 +261,9 @@ void virtio_gpu_driver_unload(struct drm_device *dev) flush_work(&vgdev->config_changed_work); vgdev->vdev->config->del_vqs(vgdev->vdev); + if (!vgdev) + return; + virtio_gpu_modeset_fini(vgdev); virtio_gpu_ttm_fini(vgdev); virtio_gpu_free_vbufs(vgdev); -- 2.30.2 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization ```