linux-kernel - Re: [REGRESSION] 5.16rc1: SA

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: <CAP045Aq06LV_jbXVc85bYU62h5EoVQ=rD9pDn+nGaUJ+iWe62w@mail.gmail.com>
Date:   Fri, 19 Nov 2021 08:07:36 -0800
From:   Kyle Huey <me@...ehuey.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrea Righi <andrea.righi@...onical.com>,
        Shuah Khan <shuah@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Andy Lutomirski <luto@...capital.net>,
        Will Drewry <wad@...omium.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-hardening@...r.kernel.org,
        "Robert O'Callahan" <rocallahan@...il.com>
Subject: Re: [REGRESSION] 5.16rc1: SA_IMMUTABLE breaks debuggers

On Thu, Nov 18, 2021 at 8:12 AM Eric W. Biederman <ebiederm@...ssion.com> wrote:
> Kyle thank you for your explanation of what breaks.  For future kernels
> I do need to do some work in this area and I will copy on the patches
> going forward.  In particular I strongly suspect that changing the
> sigaction and blocked state of the signal for these synchronous signals
> is the wrong thing to do, especially if the process is not killed.  I
> want to find another solution that does not break things but that also
> does not change the program state behind the programs back so things
> work differently under the debugger.

The heads up in the future is appreciated, thanks.

- Kyle