Description: KVM: LAPIC: Fix pv ipis use-before-initialization
References:
 https://lkml.org/lkml/2018/11/20/411
 https://marc.info/?t=154270881000036&r=1&w=2
Notes:
 carnil> Introduced by 4180bf1b655a791a0a6ef93a2ffffc762722c782 (4.19-rc1)
Bugs:
upstream: released (4.20-rc5) [38ab012f109caf10f471db1adf284e620dd8d701]
4.9-upstream-stable: N/A "Vulnerable code introduced later"
3.16-upstream-stable: N/A "Vulnerable code introduced later"
sid: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"
3.16-jessie-security: N/A "Vulnerable code not present"