Description: KVM: x86: hyper-v: Fix Hyper-V context null-ptr-deref
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=1947139#c4
Notes:
 carnil> Possibly only an issue after 8f014550dfb1 ("KVM: x86: hyper-v:
 carnil> Make Hyper-V emulation enablement conditional") in 5.12-rc1.
Bugs:
upstream: released (5.12-rc2) [919f4ebc598701670e80e31573a58f1f2d2bf918]
5.10-upstream-stable: N/A "Vulnerable code introduced later"
4.19-upstream-stable: N/A "Vulnerable code introduced later"
4.9-upstream-stable: N/A "Vulnerable code introduced later"
sid: N/A "Vulnerable code introduced later"
4.19-buster-security: N/A "Vulnerable code introduced later"
4.9-stretch-security: N/A "Vulnerable code introduced later"