From: Andrey Konovalov <andreyknvl@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Marco Elver <elver@google.com>, Ard Biesheuvel <ardb@kernel.org>,
Arvind Sankar <nivedita@alum.mit.edu>,
kasan-dev@googlegroups.com, linux-mm@kvack.org,
linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
Walter Wu <walter-zh.wu@mediatek.com>,
Elena Petrova <lenaptr@google.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Andrey Konovalov <andreyknvl@google.com>
Subject: [PATCH v2 5/5] kasan: adjust kasan_stack_oob for tag-based mode
Date: Tue, 4 Aug 2020 14:41:28 +0200 [thread overview]
Message-ID: <3063ab1411e92bce36061a96e25b651212e70ba6.1596544734.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1596544734.git.andreyknvl@google.com>
Use OOB_TAG_OFF as access offset to land the access into the next granule.
Suggested-by: Walter Wu <walter-zh.wu@mediatek.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
lib/test_kasan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 7674616d0c37..5d3f496893ef 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -488,7 +488,7 @@ static noinline void __init kasan_global_oob(void)
static noinline void __init kasan_stack_oob(void)
{
char stack_array[10];
- volatile int i = 0;
+ volatile int i = OOB_TAG_OFF;
char *p = &stack_array[ARRAY_SIZE(stack_array) + i];
pr_info("out-of-bounds on stack\n");
--
2.28.0.163.g6104cc2f0b6-goog
prev parent reply other threads:[~2020-08-04 12:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-04 12:41 [PATCH v2 0/5] kasan: support stack instrumentation for tag-based mode Andrey Konovalov
2020-08-04 12:41 ` [PATCH v2 1/5] kasan: don't tag stacks allocated with pagealloc Andrey Konovalov
2020-08-04 12:41 ` [PATCH v2 2/5] efi: provide empty efi_enter_virtual_mode implementation Andrey Konovalov
2020-08-04 12:45 ` Ard Biesheuvel
2020-08-04 12:41 ` [PATCH v2 3/5] kasan, arm64: don't instrument functions that enable kasan Andrey Konovalov
2020-08-04 13:19 ` Catalin Marinas
2020-08-04 13:24 ` Andrey Konovalov
2020-08-04 12:41 ` [PATCH v2 4/5] kasan: allow enabling stack tagging for tag-based mode Andrey Konovalov
2020-08-04 12:41 ` Andrey Konovalov [this message]
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