The quilt patch titled
Subject: kasan: speed up match_all_mem_tag test for SW_TAGS
has been removed from the -mm tree. Its filename was
kasan-speed-up-match_all_mem_tag-test-for-sw_tags.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: speed up match_all_mem_tag test for SW_TAGS
Date: Thu, 21 Dec 2023 21:04:53 +0100
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@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/kasan_test.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/mm/kasan/kasan_test.c~kasan-speed-up-match_all_mem_tag-test-for-sw_tags
+++ a/mm/kasan/kasan_test.c
@@ -1797,6 +1797,14 @@ static void match_all_mem_tag(struct kun
/* 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;
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-stop-leaking-stack-trace-handles.patch
