vm: don't treat actor state serialization errors as fatal

chain/vm/runtime.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"encoding/binary"
 	"fmt"
+	"io"
 
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/specs-actors/actors/abi"
@@ -55,6 +56,32 @@ type Runtime struct {
 	allowInternal      bool
 }
 
+type safeCBORMarshaler struct {
+	m cbg.CBORMarshaler
+}
+
+func (s *safeCBORMarshaler) MarshalCBOR(w io.Writer) error {
+	if err := s.m.MarshalCBOR(w); err != nil {
+		panic(aerrors.Newf(exitcode.ErrSerialization,"failed to marshal cbor object %s", err))
+	}
+
+	return nil
+}
+
+type safeCBORUnmarshaler struct {
+	m cbg.CBORUnmarshaler
+}
+
+func (s *safeCBORUnmarshaler) UnmarshalCBOR(r io.Reader) error {
+	if err := s.m.UnmarshalCBOR(r); err != nil {
+		panic(aerrors.Newf(exitcode.ErrSerialization,"failed to unmarshal cbor object %s", err))
+	}
+
+	return nil
+}
+
+var _ cbg.CBORUnmarshaler = &safeCBORUnmarshaler{}
+
 func (rt *Runtime) TotalFilCircSupply() abi.TokenAmount {
 	total := types.FromFil(build.TotalFilecoin)
 
@@ -106,7 +133,7 @@ type notFoundErr interface {
 }
 
 func (rs *Runtime) Get(c cid.Cid, o vmr.CBORUnmarshaler) bool {
-	if err := rs.cst.Get(context.TODO(), c, o); err != nil {
+	if err := rs.cst.Get(context.TODO(), c, &safeCBORUnmarshaler{o}); err != nil {
 		var nfe notFoundErr
 		if xerrors.As(err, &nfe) && nfe.IsNotFound() {
 			return false
@@ -118,7 +145,7 @@ func (rs *Runtime) Get(c cid.Cid, o vmr.CBORUnmarshaler) bool {
 }
 
 func (rs *Runtime) Put(x vmr.CBORMarshaler) cid.Cid {
-	c, err := rs.cst.Put(context.TODO(), x)
+	c, err := rs.cst.Put(context.TODO(), &safeCBORMarshaler{x})
 	if err != nil {
 		panic(aerrors.Fatalf("failed to put cbor object: %s", err))
 	}