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vhost-user-gpu: fix memory leak while calling 'vg_resource_unref' (CVE-2021-3544)
If the guest trigger following sequences, the attach_backing will be leaked:
vg_resource_create_2d
vg_resource_attach_backing
vg_resource_unref
This patch fix this by freeing 'res->iov' in vg_resource_destroy.
Fixes: CVE-2021-3544
Reported-by: Li Qiang <liq3ea@163.com>
virtio-gpu fix: 5e8e3c4c75
("virtio-gpu: fix resource leak
in virgl_cmd_resource_unref")
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Li Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-5-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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@ -400,6 +400,7 @@ vg_resource_destroy(VuGpu *g,
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}
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vugbm_buffer_destroy(&res->buffer);
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g_free(res->iov);
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pixman_image_unref(res->image);
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QTAILQ_REMOVE(&g->reslist, res, next);
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g_free(res);
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