diff options
Diffstat (limited to 'lib/test_kasan.c')
| -rw-r--r-- | lib/test_kasan.c | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c index c344fe506ffc..502709db41c0 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -41,16 +41,20 @@ static bool multishot; /* * Temporarily enable multi-shot mode. Otherwise, KASAN would only report the - * first detected bug and panic the kernel if panic_on_warn is enabled. + * first detected bug and panic the kernel if panic_on_warn is enabled. For + * hardware tag-based KASAN also allow tag checking to be reenabled for each + * test, see the comment for KUNIT_EXPECT_KASAN_FAIL(). */ static int kasan_test_init(struct kunit *test) { multishot = kasan_save_enable_multi_shot(); + kasan_set_tagging_report_once(false); return 0; } static void kasan_test_exit(struct kunit *test) { + kasan_set_tagging_report_once(true); kasan_restore_multi_shot(multishot); } @@ -59,19 +63,31 @@ static void kasan_test_exit(struct kunit *test) * KASAN report; causes a test failure otherwise. This relies on a KUnit * resource named "kasan_data". Do not use this name for KUnit resources * outside of KASAN tests. + * + * For hardware tag-based KASAN, when a tag fault happens, tag checking is + * normally auto-disabled. When this happens, this test handler reenables + * tag checking. As tag checking can be only disabled or enabled per CPU, this + * handler disables migration (preemption). */ -#define KUNIT_EXPECT_KASAN_FAIL(test, expression) do { \ - fail_data.report_expected = true; \ - fail_data.report_found = false; \ - kunit_add_named_resource(test, \ - NULL, \ - NULL, \ - &resource, \ - "kasan_data", &fail_data); \ - expression; \ - KUNIT_EXPECT_EQ(test, \ - fail_data.report_expected, \ - fail_data.report_found); \ +#define KUNIT_EXPECT_KASAN_FAIL(test, expression) do { \ + if (IS_ENABLED(CONFIG_KASAN_HW_TAGS)) \ + migrate_disable(); \ + fail_data.report_expected = true; \ + fail_data.report_found = false; \ + kunit_add_named_resource(test, \ + NULL, \ + NULL, \ + &resource, \ + "kasan_data", &fail_data); \ + expression; \ + KUNIT_EXPECT_EQ(test, \ + fail_data.report_expected, \ + fail_data.report_found); \ + if (IS_ENABLED(CONFIG_KASAN_HW_TAGS)) { \ + if (fail_data.report_found) \ + kasan_enable_tagging(); \ + migrate_enable(); \ + } \ } while (0) #define KASAN_TEST_NEEDS_CONFIG_ON(test, config) do { \ |