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drm/virtio: Fix double free on probe failure 

[ Upstream commit cec7f1774605a5ef47c134af62afe7c75c30b0ee ]

The virtio_gpu_init() will free vgdev and vgdev->vbufs on failure.
But such failure will be caught by virtio_gpu_probe() and then
virtio_gpu_release() will be called to do some cleanup which
will free vgdev and vgdev->vbufs again. So let's set dev->dev_private
to NULL to avoid double free.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210517084913.403-2-xieyongji@bytedance.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xie Yongji 2021-05-17 16:49:12 +08:00 committed by Greg Kroah-Hartman
parent 5e2d303b45
commit 6ebfdf01cc
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/virtio/virtgpu_kms.c
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@ -218,6 +218,7 @@ err_ttm:
err_vbufs:
vgdev->vdev->config->del_vqs(vgdev->vdev);
err_vqs:
dev->dev_private = NULL;
kfree(vgdev);
return ret;
}