vhost/vsock: accept only packets with the right dst_cid (8a3cc29c) · Commits · 戴 / test

When we receive a new packet from the guest, we check if the src_cid is correct, but we forgot to check the dst_cid. The host should accept only packets where dst_cid is equal to the host CID. Signed-off-by:

Stefano Garzarella <sgarzare@redhat.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

drivers/vhost/vsock.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -480,7 +480,9 @@ static void vhost_vsock_handle_tx_kick(struct vhost_work *work)
		virtio_transport_deliver_tap_pkt(pkt);

		/* Only accept correctly addressed packets */
		if (le64_to_cpu(pkt->hdr.src_cid) == vsock->guest_cid)
		if (le64_to_cpu(pkt->hdr.src_cid) == vsock->guest_cid &&
		le64_to_cpu(pkt->hdr.dst_cid) ==
		vhost_transport_get_local_cid())
		virtio_transport_recv_pkt(&vhost_transport, pkt);
		else
		virtio_transport_free_pkt(pkt);

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