Comment 1 for bug 1271669

The modules build by the open-vm-tools-dkms package require symbols from drivers/misc/vmw_vmci/vmw_vmci.ko which is currently shipped in the extra. These are the insmod errors from the dkms modules, the symbols are provided by vmw_vmci.ko:

vmhgfs fails to load:
[386915.338195] vmhgfs: module verification failed: signature and/or required key missing - tainting kernel
[386915.338245] vmhgfs: Unknown symbol vmci_datagram_destroy_handle (err 0)
[386915.338288] vmhgfs: Unknown symbol vmci_datagram_send (err 0)
[386915.338337] vmhgfs: Unknown symbol vmci_datagram_create_handle (err 0)

As well as vsock:
[386943.938818] vsock: Unknown symbol vmci_datagram_create_handle_priv (err 0)
[386943.938827] vsock: Unknown symbol vmci_context_get_priv_flags (err 0)
[386943.938836] vsock: Unknown symbol vmci_qpair_get_produce_indexes (err 0)
[386943.938840] vsock: Unknown symbol vmci_qpair_consume_buf_ready (err 0)
[386943.938848] vsock: Unknown symbol vmci_datagram_destroy_handle (err 0)
[386943.938864] vsock: Unknown symbol vmci_qpair_produce_buf_ready (err 0)
[386943.938873] vsock: Unknown symbol vmci_event_subscribe (err 0)
[386943.938882] vsock: Unknown symbol vmci_datagram_send (err 0)
[386943.938889] vsock: Unknown symbol vmci_qpair_produce_free_space (err 0)
[386943.938909] vsock: Unknown symbol vmci_qpair_get_consume_indexes (err 0)
[386943.938917] vsock: Unknown symbol vmci_qpair_consume_free_space (err 0)
[386943.938921] vsock: Unknown symbol vmci_qpair_peekv (err 0)
[386943.938925] vsock: Unknown symbol vmci_is_context_owner (err 0)
[386943.938928] vsock: Unknown symbol vmci_datagram_create_handle (err 0)
[386943.938935] vsock: Unknown symbol vmci_qpair_alloc (err 0)
[386943.938946] vsock: Unknown symbol vmci_qpair_detach (err 0)
[386943.938953] vsock: Unknown symbol vmci_qpair_dequev (err 0)
[386943.938959] vsock: Unknown symbol vmci_qpair_enquev (err 0)
[386943.938967] vsock: Unknown symbol vmci_event_unsubscribe (err 0)
[386943.938971] vsock: Unknown symbol vmci_get_context_id (err 0)