linux-kernel - [PATCH 0/8] kasan: test: avoid crashing the kernel with HW

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Date:   Wed, 11 Aug 2021 21:21:16 +0200
From:   andrey.konovalov@...ux.dev
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrey Konovalov <andreyknvl@...il.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Marco Elver <elver@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/8] kasan: test: avoid crashing the kernel with HW_TAGS

From: Andrey Konovalov <andreyknvl@...il.com>

KASAN tests do out-of-bounds and use-after-free accesses. Running the
tests works fine for the GENERIC mode, as it uses qurantine and redzones.
But the HW_TAGS mode uses neither, and running the tests might crash
the kernel.

Rework the tests to avoid corrupting kernel memory.

Andrey Konovalov (8):
  kasan: test: rework kmalloc_oob_right
  kasan: test: avoid writing invalid memory
  kasan: test: avoid corrupting memory via memset
  kasan: test: disable kmalloc_memmove_invalid_size for HW_TAGS
  kasan: test: only do kmalloc_uaf_memset for generic mode
  kasan: test: clean up ksize_uaf
  kasan: test: avoid corrupting memory in copy_user_test
  kasan: test: avoid corrupting memory in kasan_rcu_uaf

 lib/test_kasan.c        | 74 ++++++++++++++++++++++++++++-------------
 lib/test_kasan_module.c | 20 +++++------
 2 files changed, 60 insertions(+), 34 deletions(-)

-- 
2.25.1