Description: nVMX: Check current_vmcs12 before accessing in handle_invept()
References:
Notes:
 carnil> Introduced in bfd0a56b90005f8c8a004baf407ad90045c2b11e (3.12-rc1)
 carnil> for linux-3.2.y commit 02a988e6e4511b1f6d83525710a12db9c5a45149 (3.2.64)
 carnil> backports bfd0a56b90005f8c8a004baf407ad90045c2b11e but is quite
 carnil> reduced.
 bwh> The backport to 3.2 was a *non*-implementation of INVEPT that doesn't
 bwh> have this issue.
Bugs:
 https://bugzilla.kernel.org/show_bug.cgi?id=195167
 https://launchpad.net/bugs/1678676
upstream: released (3.16-rc4) [4b855078601fc422dbac3059f2215e776f49780f]
4.9-upstream-stable: N/A "Fixed before branch point" 
3.16-upstream-stable: N/A "Fixed before branch point"
3.2-upstream-stable: N/A "Vulnerable code not present"
sid: released (3.16.2-1)
3.16-jessie-security: N/A "Vulnerable code not present"
3.2-wheezy-security: N/A "Vulnerable code not present"