syz-ci: de-hardcode list of VMs that support overcommit

We currently have this list in multiple places (somewhat diverged).
Specify this "overcommit" property in VM implementations.
In particular, we also want to allow overcommit for "vmm" type.

Update #712

1 files changed, 2 insertions, 4 deletions

diff --git a/pkg/instance/instance.go b/pkg/instance/instance.go
index ad0a1ba76..c7c457ea6 100644
--- a/pkg/instance/instance.go
+++ b/pkg/instance/instance.go
@@ -31,10 +31,8 @@ type Env struct {
 }
 
 func NewEnv(cfg *mgrconfig.Config) (*Env, error) {
-	switch cfg.Type {
-	case "gce", "qemu", "gvisor":
-	default:
-		return nil, fmt.Errorf("test instances can only work with qemu/gce")
+	if !vm.AllowsOvercommit(cfg.Type) {
+		return nil, fmt.Errorf("test instances are not supported for %v VMs", cfg.Type)
 	}
 	if cfg.Workdir == "" {
 		return nil, fmt.Errorf("workdir path is empty")