From 4e397274e10beb385cee1a04c7850c1c46ae5d3e Mon Sep 17 00:00:00 2001 From: Andrey Konovalov Date: Thu, 21 Dec 2023 21:04:53 +0100 Subject: kasan: speed up match_all_mem_tag test for SW_TAGS 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. Link: https://lkml.kernel.org/r/6fe51262defd80cdc1150c42404977aafd1b6167.1703188911.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Marco Elver Signed-off-by: Andrew Morton --- 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 691c15fc7cdb..971cfff4ca0b 100644 --- a/mm/kasan/kasan_test.c +++ b/mm/kasan/kasan_test.c @@ -1797,6 +1797,14 @@ 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; -- cgit v1.2.3