linux-kernel - Re: [GIT PULL] x86/urgent for v5.11-rc7

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: <CAHk-=wgNXnmxjm+kK1ufjHfQPOBbuD5w3CTkSe0azF3NNWEHHQ@mail.gmail.com>
Date:   Tue, 9 Feb 2021 10:09:37 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Peter Zijlstra <peterz@...radead.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Borislav Petkov <bp@...e.de>,
        Dave Hansen <dave.hansen@...el.com>, x86-ml <x86@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        live-patching@...r.kernel.org
Subject: Re: [GIT PULL] x86/urgent for v5.11-rc7

On Tue, Feb 9, 2021 at 8:55 AM Andy Lutomirski <luto@...capital.net> wrote:
>
> Or we hack up #CP to handle this case. I don’t quite know how I feel about this.

I think that's the sane model - if we've replaced the instruction with
'int3', and we end up getting #CP due to that, just do the #BP
handling.

Anything else would just be insanely complicated, I feel.

             Linus