The patch titled
Subject: kasan: test: disable kmalloc_memmove_invalid_size for HW_TAGS
has been removed from the -mm tree. Its filename was
kasan-test-disable-kmalloc_memmove_invalid_size-for-hw_tags.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Subject: kasan: test: disable kmalloc_memmove_invalid_size for HW_TAGS
The HW_TAGS mode doesn't check memmove for negative size. As a result,
the kmalloc_memmove_invalid_size test corrupts memory, which can result in
a crash.
Disable this test with HW_TAGS KASAN.
Link: https://lkml.kernel.org/r/088733a06ac21eba29aa85b6f769d2abd74f9638.1628779805.git.andreyknvl@xxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_kasan.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/lib/test_kasan.c~kasan-test-disable-kmalloc_memmove_invalid_size-for-hw_tags
+++ a/lib/test_kasan.c
@@ -501,11 +501,17 @@ static void kmalloc_memmove_invalid_size
size_t size = 64;
volatile size_t invalid_size = -2;
+ /*
+ * Hardware tag-based mode doesn't check memmove for negative size.
+ * As a result, this test introduces a side-effect memory corruption,
+ * which can result in a crash.
+ */
+ KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_HW_TAGS);
+
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
memset((char *)ptr, 0, 64);
-
KUNIT_EXPECT_KASAN_FAIL(test,
memmove((char *)ptr, (char *)ptr + 4, invalid_size));
kfree(ptr);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxx are
