Re: [PATCH v3 1/8] exec: introduce cred_guard_light

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On 10/30, Jann Horn wrote:
>
> This is a new per-threadgroup lock that can often be taken instead of
> cred_guard_mutex and has less deadlock potential. I'm doing this because
> Oleg Nesterov mentioned the potential for deadlocks, in particular if a
> debugged task is stuck in execve, trying to get rid of a ptrace-stopped
> thread, and the debugger attempts to inspect procfs files of the debugged
> task.

Yes, but let me repeat that we need to fix this anyway. So I don't really
understand why should we add yet another mutex.

Oleg.

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