Merge tag 'linux_kselftest-kunit-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kunit updates from Shuah Khan:

 - fix race condition in try-catch completion

 - change __kunit_test_suites_init() to exit early if there is
   nothing to test

 - change string-stream-test to use KUNIT_DEFINE_ACTION_WRAPPER

 - move fault tests behind KUNIT_FAULT_TEST Kconfig option

 - kthread test fixes and improvements

 - iov_iter test fixes

* tag 'linux_kselftest-kunit-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kunit: bail out early in __kunit_test_suites_init() if there are no suites to test
  kunit: string-stream-test: use KUNIT_DEFINE_ACTION_WRAPPER
  kunit: test: Move fault tests behind KUNIT_FAULT_TEST Kconfig option
  kunit: unregister the device on error
  kunit: Fix race condition in try-catch completion
  kunit: Add tests for fault
  kunit: Print last test location on fault
  kunit: Fix KUNIT_SUCCESS() calls in iov_iter tests
  kunit: Handle test faults
  kunit: Fix timeout message
  kunit: Fix kthread reference
  kunit: Handle thread creation error

1 files changed, 44 insertions, 1 deletions

diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c
index f7980ef236a3..e3412e0ca399 100644
--- a/lib/kunit/kunit-test.c
+++ b/lib/kunit/kunit-test.c
@@ -109,6 +109,48 @@ static struct kunit_suite kunit_try_catch_test_suite = {
 	.test_cases = kunit_try_catch_test_cases,
 };
 
+#if IS_ENABLED(CONFIG_KUNIT_FAULT_TEST)
+
+static void kunit_test_null_dereference(void *data)
+{
+	struct kunit *test = data;
+	int *null = NULL;
+
+	*null = 0;
+
+	KUNIT_FAIL(test, "This line should never be reached\n");
+}
+
+static void kunit_test_fault_null_dereference(struct kunit *test)
+{
+	struct kunit_try_catch_test_context *ctx = test->priv;
+	struct kunit_try_catch *try_catch = ctx->try_catch;
+
+	kunit_try_catch_init(try_catch,
+			     test,
+			     kunit_test_null_dereference,
+			     kunit_test_catch);
+	kunit_try_catch_run(try_catch, test);
+
+	KUNIT_EXPECT_EQ(test, try_catch->try_result, -EINTR);
+	KUNIT_EXPECT_TRUE(test, ctx->function_called);
+}
+
+#endif /* CONFIG_KUNIT_FAULT_TEST */
+
+static struct kunit_case kunit_fault_test_cases[] = {
+#if IS_ENABLED(CONFIG_KUNIT_FAULT_TEST)
+	KUNIT_CASE(kunit_test_fault_null_dereference),
+#endif /* CONFIG_KUNIT_FAULT_TEST */
+	{}
+};
+
+static struct kunit_suite kunit_fault_test_suite = {
+	.name = "kunit_fault",
+	.init = kunit_try_catch_test_init,
+	.test_cases = kunit_fault_test_cases,
+};
+
 /*
  * Context for testing test managed resources
  * is_resource_initialized is used to test arbitrary resources
@@ -826,6 +868,7 @@ static struct kunit_suite kunit_current_test_suite = {
 
 kunit_test_suites(&kunit_try_catch_test_suite, &kunit_resource_test_suite,
 		  &kunit_log_test_suite, &kunit_status_test_suite,
-		  &kunit_current_test_suite, &kunit_device_test_suite);
+		  &kunit_current_test_suite, &kunit_device_test_suite,
+		  &kunit_fault_test_suite);
 
 MODULE_LICENSE("GPL v2");