tree b6b0b7a722019ceb767d5c089a5545ebb209b654
parent 0dd67ff814b1a313558e2693b802b4da5d61daf5
author David Brazdil <dbrazdil@google.com> 1569586856 +0100
committer David Brazdil <dbrazdil@google.com> 1569589610 +0000

Fix panic in vm_find() for reserved IDs

vm_find() is called from VM API and should return NULL if the given ID
does not correspond to a valid VM. This was not the case for ID zero
(reserved for the hypervisor), upon which Hafnium would fail a CHECK
and panic. Fix the issue and add a test case.

Test: hf_vcpu_get_count.reserved_vm_id
Change-Id: I0205e64c5cb5a98cdb24ba2cd75d417845ffaddd