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Date:   Fri, 19 Nov 2021 08:07:36 -0800
From:   Kyle Huey <>
To:     "Eric W. Biederman" <>
Cc:     Kees Cook <>,
        Linus Torvalds <>,
        Andrea Righi <>,
        Shuah Khan <>,
        Alexei Starovoitov <>,
        Andy Lutomirski <>,
        Will Drewry <>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <>, bpf <>,
        open list <>,,
        "Robert O'Callahan" <>
Subject: Re: [REGRESSION] 5.16rc1: SA_IMMUTABLE breaks debuggers

On Thu, Nov 18, 2021 at 8:12 AM Eric W. Biederman <> 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

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