From: andrey.konovalov@linux.dev
To: Marco Elver <elver@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
kasan-dev@googlegroups.com,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH mm 11/11] kasan: speed up match_all_mem_tag test for SW_TAGS
Date: Thu, 21 Dec 2023 21:04:53 +0100 [thread overview]
Message-ID: <6fe51262defd80cdc1150c42404977aafd1b6167.1703188911.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1703188911.git.andreyknvl@google.com>
From: Andrey Konovalov <andreyknvl@google.com>
Checking all 256 possible tag values in the match_all_mem_tag KASAN test
is slow and produces 256 reports. Instead, just check the first 8 and the
last 8.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
mm/kasan/kasan_test.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/mm/kasan/kasan_test.c b/mm/kasan/kasan_test.c
index 798df4983858..9c3a1aaab21b 100644
--- a/mm/kasan/kasan_test.c
+++ b/mm/kasan/kasan_test.c
@@ -1785,6 +1785,14 @@ static void match_all_mem_tag(struct kunit *test)
/* For each possible tag value not matching the pointer tag. */
for (tag = KASAN_TAG_MIN; tag <= KASAN_TAG_KERNEL; tag++) {
+ /*
+ * For Software Tag-Based KASAN, skip the majority of tag
+ * values to avoid the test printing too many reports.
+ */
+ if (IS_ENABLED(CONFIG_KASAN_SW_TAGS) &&
+ tag >= KASAN_TAG_MIN + 8 && tag <= KASAN_TAG_KERNEL - 8)
+ continue;
+
if (tag == get_tag(ptr))
continue;
--
2.25.1
prev parent reply other threads:[~2023-12-21 20:06 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-21 20:04 [PATCH mm 00/11] kasan: assorted clean-ups andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 01/11] kasan/arm64: improve comments for KASAN_SHADOW_START/END andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 02/11] mm, kasan: use KASAN_TAG_KERNEL instead of 0xff andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 03/11] kasan: improve kasan_non_canonical_hook andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 04/11] kasan: clean up kasan_requires_meta andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 05/11] kasan: update kasan_poison documentation comment andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 06/11] kasan: clean up is_kfence_address checks andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 07/11] kasan: respect CONFIG_KASAN_VMALLOC for kasan_flag_vmalloc andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 08/11] kasan: check kasan_vmalloc_enabled in vmalloc tests andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 09/11] kasan: export kasan_poison as GPL andrey.konovalov
2023-12-21 20:04 ` [PATCH mm 10/11] kasan: remove SLUB checks for page_alloc fallbacks in tests andrey.konovalov
2023-12-21 20:04 ` andrey.konovalov [this message]
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