net: vmxnet3: validate configuration values during activate (CVE-2021-20203)

net: vmxnet3: validate configuration values during activate (CVE-2021-20203)

While activating device in vmxnet3_acticate_device(), it does not
validate guest supplied configuration values against predefined
minimum - maximum limits. This may lead to integer overflow or
OOB access issues. Add checks to avoid it.

Fixes: CVE-2021-20203
Buglink: https://bugs.launchpad.net/qemu/+bug/1913873
Reported-by: Gaoning Pan <pgn@zju.edu.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit d05dcd94aee88728facafb993c7280547eb4d645)
Signed-off-by: Michael Roth <michael.roth@amd.com>