tlsfuzzer: avoid mutable default arguments

1 files changed, 18 insertions, 6 deletions

diff --git a/src/regress/lib/libssl/tlsfuzzer/tlsfuzzer.py b/src/regress/lib/libssl/tlsfuzzer/tlsfuzzer.py
index 2b78e07b4e..8e12494379 100644
--- a/src/regress/lib/libssl/tlsfuzzer/tlsfuzzer.py
+++ b/src/regress/lib/libssl/tlsfuzzer/tlsfuzzer.py
@@ -1,4 +1,4 @@
-#   $OpenBSD: tlsfuzzer.py,v 1.61 2026/07/28 10:21:34 tb Exp $
+#   $OpenBSD: tlsfuzzer.py,v 1.62 2026/07/28 10:29:05 tb Exp $
 #
 # Copyright (c) 2020 Theo Buehler <tb@openbsd.org>
 #
@@ -32,7 +32,15 @@ class Test:
 
     XXX Add client cert support.
     """
-    def __init__(self, name="", args=[], tls12_args=[], tls13_args=[]):
+
+    def __init__(self, name="", args=None, tls12_args=None, tls13_args=None):
+        if args is None:
+            args = []
+        if tls12_args is None:
+            tls12_args = []
+        if tls13_args is None:
+            tls13_args = []
+
         self.name = name
         self.tls12_args = args
         self.tls13_args = args
@@ -55,7 +63,10 @@ class Test:
 class TestGroup:
     """A group of Test objects to be run by TestRunner."""
 
-    def __init__(self, title="Tests", tests=[]):
+    def __init__(self, title="Tests", tests=None):
+        if tests is None:
+            tests = []
+
         self.title = title
         self.tests = tests
 
@@ -654,7 +665,7 @@ class TestRunner:
 
     def __init__(
         self, timing=False, verbose=False, host="localhost", port=4433,
-        use_tls1_3=True, dry_run=False, tests=[], scriptdir=tlsfuzzer_scriptdir,
+        use_tls1_3=True, dry_run=False, scriptdir=tlsfuzzer_scriptdir,
     ):
         self.tests = []
 
@@ -671,8 +682,9 @@ class TestRunner:
         self.timing = timing
         self.verbose = verbose
 
-    def add(self, title="tests", tests=[]):
-        # tests.sort(key=lambda test: test.name)
+    def add(self, title="tests", tests=None):
+        if tests is None:
+            tests = []
         self.tests.append(TestGroup(title, tests))
 
     def add_group(self, group):