From a1b9e741d4c49b79db94fb45e46034020350bdfb Mon Sep 17 00:00:00 2001
From: Romeo Rosete <roseteromeo56@gmail.com>
Date: Tue, 20 May 2025 11:00:33 -0400
Subject: [PATCH] Potential fix for code scanning alert no. 5: Size computation
 for allocation may overflow

Romeo Rosete

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
---
 common/hexutil/hexutil.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/hexutil/hexutil.go b/common/hexutil/hexutil.go
index d3201850a8..d9b5721a21 100644
--- a/common/hexutil/hexutil.go
+++ b/common/hexutil/hexutil.go
@@ -82,6 +82,9 @@ func MustDecode(input string) []byte {
 
 // Encode encodes b as a hex string with 0x prefix.
 func Encode(b []byte) string {
+	if len(b) > (int(^uint(0) >> 1))/2 {
+		panic("input too large to encode as hex string")
+	}
 	enc := make([]byte, len(b)*2+2)
 	copy(enc, "0x")
 	hex.Encode(enc[2:], b)