selftests/harness: Limit step counter reporting
diff mbox series

Message ID 202007141129.54335CEAC6@keescook
State Mainlined
Commit 850d0cc64c8e2e0895acf735ac0a53c78b80dbe5
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Series
  • selftests/harness: Limit step counter reporting
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Commit Message

Kees Cook July 14, 2020, 6:30 p.m. UTC
When the selftest "step" counter grew beyond 255, non-fatal warnings
were being emitted, which is noisy and pointless. There are selftests
with more than 255 steps (especially those in loops, etc). Instead,
just cap "steps" to 254 and do not report the saturation.

Reported-by: Ralph Campbell <rcampbell@nvidia.com>
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Fixes: 9847d24af95c ("selftests/harness: Refactor XFAIL into SKIP")
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 tools/testing/selftests/kselftest_harness.h | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

Patch
diff mbox series

diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index 935029d4fb21..4f78e4805633 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -680,7 +680,8 @@ 
 			__bail(_assert, _metadata->no_print, _metadata->step))
 
 #define __INC_STEP(_metadata) \
-	if (_metadata->passed && _metadata->step < 255) \
+	/* Keep "step" below 255 (which is used for "SKIP" reporting). */	\
+	if (_metadata->passed && _metadata->step < 253) \
 		_metadata->step++;
 
 #define is_signed_type(var)       (!!(((__typeof__(var))(-1)) < (__typeof__(var))1))
@@ -976,12 +977,6 @@  void __run_test(struct __fixture_metadata *f,
 		t->passed = 0;
 	} else if (t->pid == 0) {
 		t->fn(t, variant);
-		/* Make sure step doesn't get lost in reporting */
-		if (t->step >= 255) {
-			ksft_print_msg("Too many test steps (%u)!?\n", t->step);
-			t->step = 254;
-		}
-		/* Use 255 for SKIP */
 		if (t->skip)
 			_exit(255);
 		/* Pass is exit 0 */