VMCI: Enforce queuepair max size for IOCTL_VMCI_QUEUEPAIR_ALLOC

VMCI: Enforce queuepair max size for IOCTL_VMCI_QUEUEPAIR_ALLOC

When create the VMCI queue pair tracking data structures on the host
side, the IOCTL for creating the VMCI queue pair didn't validate
the queue pair size parameters. This change adds checks for this.

This avoids a memory allocation issue in qp_host_alloc_queue, as
reported by nslusarek@gmx.net. The check in qp_host_alloc_queue
has also been updated to enforce the maximum queue pair size
as defined by VMCI_MAX_GUEST_QP_MEMORY.

The fix has been verified using sample code supplied by
nslusarek@gmx.net.

Reported-by: nslusarek@gmx.net
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Link: https://lore.kernel.org/r/1611160420-30573-1-git-send-email-jhansen@vmware.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>