Commit b9f79858 authored by Li Qiang's avatar Li Qiang Committed by Gerd Hoffmann
Browse files

vhost-user-gpu: fix memory leak in vg_resource_attach_backing (CVE-2021-3544)



Check whether the 'res' has already been attach_backing to avoid
memory leak.

Fixes: CVE-2021-3544
Reported-by: default avatarLi Qiang <liq3ea@163.com>
virtio-gpu fix: 204f01b3

 ("virtio-gpu: fix memory leak
in resource attach backing")
Signed-off-by: default avatarLi Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau's avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-4-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann's avatarGerd Hoffmann <kraxel@redhat.com>
parent 86dd8fac
......@@ -489,6 +489,11 @@ vg_resource_attach_backing(VuGpu *g,
return;
}
if (res->iov) {
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
return;
}
ret = vg_create_mapping_iov(g, &ab, cmd, &res->iov);
if (ret != 0) {
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
......
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