linux-kernel - Re: [PATCH v2 0/2] Clean up x86

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: <CAKwvOdknXerBUV6aMhNC9y50kH3EQY+0s-aZ7Vvh8-tG8uR_wA@mail.gmail.com>
Date:   Tue, 16 Feb 2021 10:13:29 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Brian Gerst <brgerst@...il.com>,
        Joerg Roedel <jroedel@...e.de>,
        Nathan Chancellor <nathan@...nel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH v2 0/2] Clean up x86_32 stackprotector

On Sat, Feb 13, 2021 at 11:19 AM Andy Lutomirski <luto@...nel.org> wrote:
>
> x86_32 stackprotector is a maintenance nightmare.  Clean it up.  This
> disables stackprotector on x86_32 on GCC 8.1 and on all clang
> versions.  Some clang people are cc'd.

When in doubt, check the MAINTAINERS entry for LLVM for our mailing
list and listed maintainers.

>
> Changes from v1:
>  - Changelog fixes.
>  - Comment fixes (mostly from Sean).
>  - Fix the !SMP case.
>
> Andy Lutomirski (2):
>   x86/stackprotector/32: Make the canary into a regular percpu variable
>   x86/entry/32: Remove leftover macros after stackprotector cleanups
>
>  arch/x86/Kconfig                          |  7 +-
>  arch/x86/Makefile                         |  8 ++
>  arch/x86/entry/entry_32.S                 | 95 +----------------------
>  arch/x86/include/asm/processor.h          | 15 +---
>  arch/x86/include/asm/ptrace.h             |  5 +-
>  arch/x86/include/asm/segment.h            | 30 ++-----
>  arch/x86/include/asm/stackprotector.h     | 79 ++++---------------
>  arch/x86/include/asm/suspend_32.h         |  6 +-
>  arch/x86/kernel/asm-offsets_32.c          |  5 --
>  arch/x86/kernel/cpu/common.c              |  5 +-
>  arch/x86/kernel/doublefault_32.c          |  4 +-
>  arch/x86/kernel/head_32.S                 | 18 +----
>  arch/x86/kernel/setup_percpu.c            |  1 -
>  arch/x86/kernel/tls.c                     |  8 +-
>  arch/x86/kvm/svm/svm.c                    | 10 +--
>  arch/x86/lib/insn-eval.c                  |  4 -
>  arch/x86/platform/pvh/head.S              | 14 ----
>  arch/x86/power/cpu.c                      |  6 +-
>  arch/x86/xen/enlighten_pv.c               |  1 -
>  scripts/gcc-x86_32-has-stack-protector.sh |  6 +-
>  20 files changed, 62 insertions(+), 265 deletions(-)
>
> --
> 2.29.2
>


-- 
Thanks,
~Nick Desaulniers