linux-kernel - Re: [PATCH v4 0/3] KASAN support for RISC-V

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Date:   Mon, 28 Oct 2019 15:01:14 +0800
From:   Greentime Hu <green.hu@...il.com>
To:     Nick Hu <nickhu@...estech.com>,
        Greentime Hu <greentime.hu@...ive.com>
Cc:     aryabinin@...tuozzo.com, Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, corbet@....net,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Thomas Gleixner <tglx@...utronix.de>,
        gregkh@...uxfoundation.org, alankao@...estech.com,
        Anup.Patel@....com, atish.patra@....com,
        kasan-dev@...glegroups.com, linux-doc@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-riscv@...ts.infradead.org, linux-mm@...ck.org
Subject: Re: [PATCH v4 0/3] KASAN support for RISC-V

Nick Hu <nickhu@...estech.com> 於 2019年10月28日 週一 上午10:41寫道：
>
> KASAN is an important runtime memory debugging feature in linux kernel which can
> detect use-after-free and out-of-bounds problems.
>
> Changes in v2:
>   - Remove the porting of memmove and exclude the check instead.
>   - Fix some code noted by Christoph Hellwig
>
> Changes in v3:
>   - Update the KASAN documentation to mention that riscv is supported.
>
> Changes in v4:
>   - Correct the commit log
>   - Fix the bug reported by Greentime Hu
>
> Nick Hu (3):
>   kasan: No KASAN's memmove check if archs don't have it.
>   riscv: Add KASAN support
>   kasan: Add riscv to KASAN documentation.
>
>  Documentation/dev-tools/kasan.rst   |   4 +-
>  arch/riscv/Kconfig                  |   1 +
>  arch/riscv/include/asm/kasan.h      |  27 ++++++++
>  arch/riscv/include/asm/pgtable-64.h |   5 ++
>  arch/riscv/include/asm/string.h     |   9 +++
>  arch/riscv/kernel/head.S            |   3 +
>  arch/riscv/kernel/riscv_ksyms.c     |   2 +
>  arch/riscv/kernel/setup.c           |   5 ++
>  arch/riscv/kernel/vmlinux.lds.S     |   1 +
>  arch/riscv/lib/memcpy.S             |   5 +-
>  arch/riscv/lib/memset.S             |   5 +-
>  arch/riscv/mm/Makefile              |   6 ++
>  arch/riscv/mm/kasan_init.c          | 104 ++++++++++++++++++++++++++++
>  mm/kasan/common.c                   |   2 +
>  14 files changed, 173 insertions(+), 6 deletions(-)
>  create mode 100644 arch/riscv/include/asm/kasan.h
>  create mode 100644 arch/riscv/mm/kasan_init.c
>
Hi Nick,

I have tested KASAN feature with test_kasan.ko based on commit
cd9e72b80090a8cd7d84a47a30a06fa92ff277d1 (tag: riscv/for-v5.4-rc3) and
it passed in Qemu and Unleashed board.
Thank you for fixing the bug. :)

Tested-by: Greentime Hu <greentime.hu@...ive.com>