Whitelist permitted types when adding constraint in integer_underflow.py

7 years ago · 61e74fb774
parent 3077017a90
commit 61e74fb774
1 changed files with 16 additions and 13 deletions
--- a/mythril/analysis/modules/integer_underflow.py
+++ b/mythril/analysis/modules/integer_underflow.py
@ -52,6 +52,9 @@ def execute(statespace):

                logging.debug("[INTEGER_UNDERFLOW] Checking SUB " + str(op0) + ", " + str(op1) + " at address " + str(instruction['address']))

+                allowed_types = [int, BitVecRef, BitVecNumRef]
+
+                if type(op0) in allowed_types and type(op1) in allowed_types:
                    constraints.append(UGT(op1,op0))

                    try: