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Date:   Mon, 18 May 2020 15:55:06 -0700
From:   Andy Lutomirski <>
To:     Kees Cook <>
Cc:     Christian Brauner <>,
        Tycho Andersen <>,
        Sargun Dhillon <>,
        Matt Denton <>,
        Chris Palmer <>,
        Jeffrey Vander Stoep <>,
        Linux Containers <>,
        Linux API <>,
        LKML <>
Subject: Re: seccomp feature development

On Mon, May 18, 2020 at 2:05 PM Kees Cook <> wrote:
> Hi!

This is minor, but, if we grow seccomp_data, I would like to add the
other 32 bits of the syscall nr to it.  Syscall numbers are unsigned
long, but they get munged into u32 for seccomp_data.

Sure, no one uses those high bits yet, but if we're extending things
anyway, let's support them.

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