Merge tag 'linux-kselftest-kunit-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull KUnit updates from Shuah Khan:
 "Several fixes, cleanups, and enhancements to tests and framework:

   - introduce _NULL and _NOT_NULL macros to pointer error checks

   - rework kunit_resource allocation policy to fix memory leaks when
     caller doesn't specify free() function to be used when allocating
     memory using kunit_add_resource() and kunit_alloc_resource() funcs.

   - add ability to specify suite-level init and exit functions"

* tag 'linux-kselftest-kunit-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (41 commits)
  kunit: tool: Use qemu-system-i386 for i386 runs
  kunit: fix executor OOM error handling logic on non-UML
  kunit: tool: update riscv QEMU config with new serial dependency
  kcsan: test: use new suite_{init,exit} support
  kunit: tool: Add list of all valid test configs on UML
  kunit: take `kunit_assert` as `const`
  kunit: tool: misc cleanups
  kunit: tool: minor cosmetic cleanups in kunit_parser.py
  kunit: tool: make parser stop overwriting status of suites w/ no_tests
  kunit: tool: remove dead parse_crash_in_log() logic
  kunit: tool: print clearer error message when there's no TAP output
  kunit: tool: stop using a shell to run kernel under QEMU
  kunit: tool: update test counts summary line format
  kunit: bail out of test filtering logic quicker if OOM
  lib/Kconfig.debug: change KUnit tests to default to KUNIT_ALL_TESTS
  kunit: Rework kunit_resource allocation policy
  kunit: fix debugfs code to use enum kunit_status, not bool
  kfence: test: use new suite_{init/exit} support, add .kunitconfig
  kunit: add ability to specify suite-level init and exit functions
  kunit: rename print_subtest_{start,end} for clarity (s/subtest/suite)
  ...

1 files changed, 36 insertions, 1 deletions

diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c
index 555601d17f79..13d0bd8b07a9 100644
--- a/lib/kunit/kunit-test.c
+++ b/lib/kunit/kunit-test.c
@@ -190,6 +190,40 @@ static void kunit_resource_test_destroy_resource(struct kunit *test)
 	KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
 }
 
+static void kunit_resource_test_remove_resource(struct kunit *test)
+{
+	struct kunit_test_resource_context *ctx = test->priv;
+	struct kunit_resource *res = kunit_alloc_and_get_resource(
+			&ctx->test,
+			fake_resource_init,
+			fake_resource_free,
+			GFP_KERNEL,
+			ctx);
+
+	/* The resource is in the list */
+	KUNIT_EXPECT_FALSE(test, list_empty(&ctx->test.resources));
+
+	/* Remove the resource. The pointer is still valid, but it can't be
+	 * found.
+	 */
+	kunit_remove_resource(test, res);
+	KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+	/* We haven't been freed yet. */
+	KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
+
+	/* Removing the resource multiple times is valid. */
+	kunit_remove_resource(test, res);
+	KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
+	/* Despite having been removed twice (from only one reference), the
+	 * resource still has not been freed.
+	 */
+	KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
+
+	/* Free the resource. */
+	kunit_put_resource(res);
+	KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
+}
+
 static void kunit_resource_test_cleanup_resources(struct kunit *test)
 {
 	int i;
@@ -387,6 +421,7 @@ static struct kunit_case kunit_resource_test_cases[] = {
 	KUNIT_CASE(kunit_resource_test_init_resources),
 	KUNIT_CASE(kunit_resource_test_alloc_resource),
 	KUNIT_CASE(kunit_resource_test_destroy_resource),
+	KUNIT_CASE(kunit_resource_test_remove_resource),
 	KUNIT_CASE(kunit_resource_test_cleanup_resources),
 	KUNIT_CASE(kunit_resource_test_proper_free_ordering),
 	KUNIT_CASE(kunit_resource_test_static),
@@ -435,7 +470,7 @@ static void kunit_log_test(struct kunit *test)
 	KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
 				     strstr(suite.log, "along with this."));
 #else
-	KUNIT_EXPECT_PTR_EQ(test, test->log, (char *)NULL);
+	KUNIT_EXPECT_NULL(test, test->log);
 #endif
 }