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Will DeaconandGreg Kroah-Hartman
969b06bd8b
commit0dab924844upstream. When receiving a vsock packet in the guest, only the virtqueue buffer size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately, virtio_vsock_skb_rx_put() uses the length from the packet header as the length argument to skb_put(), potentially resulting in SKB overflow if the host has gone wonky. Validate the length as advertised by the packet header before calling virtio_vsock_skb_rx_put(). Cc: <stable@vger.kernel.org> Fixes:71dc9ec9ac("virtio/vsock: replace virtio_vsock_pkt with sk_buff") Signed-off-by: Will Deacon <will@kernel.org> Message-Id: <20250717090116.11987-3-will@kernel.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>