linux-kernel - Re: [PATCH 0/9] riscv: improve self-protection

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Message-ID: <mhng-c1b60b87-7dd7-43e7-91eb-1f54528384f8@palmerdabbelt-glaptop>
Date:   Thu, 22 Apr 2021 18:48:30 -0700 (PDT)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     jszhang3@...l.ustc.edu.cn
CC:     Paul Walmsley <paul.walmsley@...ive.com>, aou@...s.berkeley.edu,
        ryabinin.a.a@...il.com, glider@...gle.com, andreyknvl@...il.com,
        dvyukov@...gle.com, bjorn@...nel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Subject:     Re: [PATCH 0/9] riscv: improve self-protection

On Mon, 29 Mar 2021 11:21:44 PDT (-0700), jszhang3@...l.ustc.edu.cn wrote:
> From: Jisheng Zhang <jszhang@...nel.org>
>
> patch1 is a trivial improvement patch to move some functions to .init
> section
>
> Then following patches improve self-protection by:
>
> Marking some variables __ro_after_init
> Constifing some variables
> Enabling ARCH_HAS_STRICT_MODULE_RWX
>
> Jisheng Zhang (9):
>   riscv: add __init section marker to some functions
>   riscv: Mark some global variables __ro_after_init
>   riscv: Constify sys_call_table
>   riscv: Constify sbi_ipi_ops
>   riscv: kprobes: Implement alloc_insn_page()
>   riscv: bpf: Move bpf_jit_alloc_exec() and bpf_jit_free_exec() to core
>   riscv: bpf: Avoid breaking W^X
>   riscv: module: Create module allocations without exec permissions
>   riscv: Set ARCH_HAS_STRICT_MODULE_RWX if MMU
>
>  arch/riscv/Kconfig                 |  1 +
>  arch/riscv/include/asm/smp.h       |  4 ++--
>  arch/riscv/include/asm/syscall.h   |  2 +-
>  arch/riscv/kernel/module.c         |  2 +-
>  arch/riscv/kernel/probes/kprobes.c |  8 ++++++++
>  arch/riscv/kernel/sbi.c            | 10 +++++-----
>  arch/riscv/kernel/smp.c            |  6 +++---
>  arch/riscv/kernel/syscall_table.c  |  2 +-
>  arch/riscv/kernel/time.c           |  2 +-
>  arch/riscv/kernel/traps.c          |  2 +-
>  arch/riscv/kernel/vdso.c           |  4 ++--
>  arch/riscv/mm/init.c               | 12 ++++++------
>  arch/riscv/mm/kasan_init.c         |  6 +++---
>  arch/riscv/mm/ptdump.c             |  2 +-
>  arch/riscv/net/bpf_jit_comp64.c    | 13 -------------
>  arch/riscv/net/bpf_jit_core.c      | 14 ++++++++++++++
>  16 files changed, 50 insertions(+), 40 deletions(-)

Thanks.  These are on for-next.  I had to fix up a handful of merge 
conflicts, so LMK if I made any mistakes.