evm: check height overflow (#597)

* evm: check height overflow * rm * c++
2021-09-28 09:48:11 +00:00
parent bc82f3f8eb
commit 83627b9967
4 changed files with 76 additions and 1 deletions
@@ -66,8 +66,14 @@ func (k Keeper) VMConfig(msg core.Message, params types.Params, tracer vm.Tracer
 //  3. The requested height is from a height greater than the latest one
 func (k Keeper) GetHashFn() vm.GetHashFunc {
 	return func(height uint64) common.Hash {
-		h := int64(height)
 		ctx := k.Ctx()
+
+		h, err := ethermint.SafeInt64(height)
+		if err != nil {
+			k.Logger(ctx).Error("failed to cast height to int64", "error", err)
+			return common.Hash{}
+		}
+
 		switch {
 		case ctx.BlockHeight() == h:
 			// Case 1: The requested height matches the one from the context so we can retrieve the header