Description: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=1836244
 https://lore.kernel.org/kvm/158871401328.15589.17598154478222071285.stgit@gimli.home/
 https://lore.kernel.org/kvm/158871570274.15589.10563806532874116326.stgit@gimli.home/
Notes:
Bugs:
upstream: released (5.8-rc1) [abafbc551fddede3e0a08dee1dcde08fc0eb8476]
4.19-upstream-stable: released (4.19.144) [da7aea6eb5608695f590dcd72523536b709d0399]
4.9-upstream-stable: released (4.9.236) [5f2c69e2ef24a79b6909a6dc6b249a17909965f8]
3.16-upstream-stable: ignored "EOL"
sid: released (5.8.7-1)
4.19-buster-security: released (4.19.146-1)
4.9-stretch-security: released (4.9.240-1)
3.16-jessie-security: ignored "EOL"