test/fuzzers: fuzz rlp handling of big.Int and uint256.Int (#26917)

test/fuzzers: fuzz rlp handling of big.Lnt and uint256.Int

tests/fuzzers/rlp/rlp_fuzzer.go

@@ -19,9 +19,11 @@ package rlp
 import (
 	"bytes"
 	"fmt"
+	"math/big"
 
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/holiman/uint256"
 )
 
 func decodeEncode(input []byte, val interface{}, i int) {
@@ -126,5 +128,16 @@ func Fuzz(input []byte) int {
 		var rs types.Receipts
 		decodeEncode(input, &rs, i)
 	}
+	{
+		i++
+		var v struct {
+			AnIntPtr  *big.Int
+			AnInt     big.Int
+			AnU256Ptr *uint256.Int
+			AnU256    uint256.Int
+			NotAnU256 [4]uint64
+		}
+		decodeEncode(input, &v, i)
+	}
 	return 1
 }