linux-kernel - Re: [PATCH 0/8] Support strict kernel memory permissions for security

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Message-ID: <mhng-f31549a4-4c1b-4f9d-a034-2d0217bc1ecd@palmerdabbelt-glaptop1>
Date:   Thu, 05 Mar 2020 07:55:24 -0800 (PST)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     zong.li@...ive.com
CC:     Paul Walmsley <paul.walmsley@...ive.com>, aou@...s.berkeley.edu,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        zong.li@...ive.com
Subject:     Re: [PATCH 0/8] Support strict kernel memory permissions for security

On Mon, 17 Feb 2020 00:32:15 PST (-0800), zong.li@...ive.com wrote:
> The main purpose of this patch series is changing the kernel mapping permission
> , make sure that code is not writeable, data is not executable, and read-only
> data is neither writable nor executable.
>
> This patch series also supports the relevant implementations such as
> ARCH_HAS_SET_MEMORY, ARCH_HAS_SET_DIRECT_MAP,
> ARCH_SUPPORTS_DEBUG_PAGEALLOC and DEBUG_WX.
>
> Zong Li (8):
>   riscv: add ARCH_HAS_SET_MEMORY support
>   riscv: add ARCH_HAS_SET_DIRECT_MAP support
>   riscv: add ARCH_SUPPORTS_DEBUG_PAGEALLOC support
>   riscv: move exception table immediately after RO_DATA
>   riscv: add alignment for text, rodata and data sections
>   riscv: add STRICT_KERNEL_RWX support
>   riscv: add DEBUG_WX support
>   riscv: add two hook functions of ftrace
>
>  arch/riscv/Kconfig                  |   6 +
>  arch/riscv/Kconfig.debug            |  30 +++++
>  arch/riscv/include/asm/ptdump.h     |   6 +
>  arch/riscv/include/asm/set_memory.h |  41 ++++++
>  arch/riscv/kernel/ftrace.c          |  18 +++
>  arch/riscv/kernel/vmlinux.lds.S     |  12 +-
>  arch/riscv/mm/Makefile              |   1 +
>  arch/riscv/mm/init.c                |  47 +++++++
>  arch/riscv/mm/pageattr.c            | 187 ++++++++++++++++++++++++++++
>  9 files changed, 344 insertions(+), 4 deletions(-)
>  create mode 100644 arch/riscv/include/asm/set_memory.h
>  create mode 100644 arch/riscv/mm/pageattr.c

Sorry, I had to run last night without quite finishing the patch set.  Just so
we're on the same page: there's some issues with the patch set, I'm assuming
you're submitting a v2 so I'm dropping this from my inbox.

Thanks!