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authorAndrey Konovalov <andreyknvl@google.com>2023-12-21 23:04:53 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-12-29 22:58:46 +0300
commit4e397274e10beb385cee1a04c7850c1c46ae5d3e (patch)
treec3fd1f097f037e9505e41517b4b17388ad396908 /mm/kasan
parent3ab9304db6ab13a8d4b5f99ef0bbd9302f26c741 (diff)
downloadlinux-4e397274e10beb385cee1a04c7850c1c46ae5d3e.tar.xz
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 <andreyknvl@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/kasan')
-rw-r--r--mm/kasan/kasan_test.c8
1 files changed, 8 insertions, 0 deletions
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;