linux-kernel - Re: [PATCH] RISC-V: insn: Use a raw spinlock to protect TEXT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20210430073431.1bc4946d@oasis.local.home>
Date:   Fri, 30 Apr 2021 07:34:31 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Anup Patel <Anup.Patel@....com>
Cc:     Changbin Du <changbin.du@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "aou@...s.berkeley.edu" <aou@...s.berkeley.edu>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "jpoimboe@...hat.com" <jpoimboe@...hat.com>,
        "jbaron@...mai.com" <jbaron@...mai.com>,
        "ardb@...nel.org" <ardb@...nel.org>,
        Atish Patra <Atish.Patra@....com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "rppt@...nel.org" <rppt@...nel.org>,
        "mhiramat@...nel.org" <mhiramat@...nel.org>,
        "zong.li@...ive.com" <zong.li@...ive.com>,
        "guoren@...ux.alibaba.com" <guoren@...ux.alibaba.com>,
        "wangkefeng.wang@...wei.com" <wangkefeng.wang@...wei.com>,
        "0x7f454c46@...il.com" <0x7f454c46@...il.com>,
        "chenhuang5@...wei.com" <chenhuang5@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-team@...roid.com" <kernel-team@...roid.com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>
Subject: Re: [PATCH] RISC-V: insn: Use a raw spinlock to protect TEXT_POKE*

On Fri, 30 Apr 2021 04:06:35 +0000
Anup Patel <Anup.Patel@....com> wrote:

> This patch only takes care of ftrace path.
> 
> The RISC-V instruction patching is used by RISC-V jump label implementation
> as well and will called from various critical parts of core kernel.
> 
> The RAW spinlock approach allows same instruction patching to be used
> for kprobes, ftrace, and jump label.

So what path hits this outside of stop machine?

-- Steve