core/types: sanity check the basefee length inside a header (ethereum…

…#23171)
METADIUM · Jul 6, 2021 · e13d14e · e13d14e
1 parent d21a069
commit e13d14e
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/core/types/block.go b/core/types/block.go
@@ -129,6 +129,11 @@ func (h *Header) SanityCheck() error {
 	if eLen := len(h.Extra); eLen > 100*1024 {
 		return fmt.Errorf("too large block extradata: size %d", eLen)
 	}
+	if h.BaseFee != nil {
+		if bfLen := h.BaseFee.BitLen(); bfLen > 256 {
+			return fmt.Errorf("too large base fee: bitlen %d", bfLen)
+		}
+	}
 	return nil
 }