Messages in this thread Patch in this message | | | From | andrey.konovalov@linux ... | 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 |
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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
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