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SubjectRe: [PATCH 0/8] Support strict kernel memory permissions for security
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On Mon, 17 Feb 2020 00:32:15 PST (-0800), zong.li@sifive.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!

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