Description: drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=1711194
 https://www.openwall.com/lists/oss-security/2019/05/22/5
Notes:
 carnil> CONFIG_FSL_HV_MANAGER not enabled, so only affected source-wise.
Bugs:
upstream: released (5.2-rc1) [6a024330650e24556b8a18cc654ad00cfecf6c6c]
4.19-upstream-stable: released (4.19.44) [e9ec5073c90d6de2ca5338bd67f7935b19d7c0c7]
4.9-upstream-stable: released (4.9.177) [71e29a15b4babddba1a6faab6d98d2dcce1cd0ff]
3.16-upstream-stable: released (3.16.69) [bfa8c73482dae6bafc0741cbfd63f84d11311b36]
sid: released (5.2.6-1)
4.19-buster-security: released (4.19.67-1)
4.9-stretch-security: released (4.9.184-1)
3.16-jessie-security: released (3.16.70-1)