linux-kernel - Re: [PATCH] proc: add SecBits field to /proc/<PID>/status

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Message-ID: <20220205031032.GA14228@mail.hallyn.com>
Date:   Fri, 4 Feb 2022 21:10:32 -0600
From:   "Serge E. Hallyn" <serge@...lyn.com>
To:     James Morris <jmorris@...ei.org>
Cc:     "Andrew G. Morgan" <morgan@...nel.org>,
        linux-kernel@...r.kernel.org,
        Eric Biederman <ebiederm@...ssion.com>,
        "Serge E . Hallyn" <serge@...lyn.com>
Subject: Re: [PATCH] proc: add SecBits field to /proc/<PID>/status

On Fri, Feb 04, 2022 at 04:32:00AM +1100, James Morris wrote:
> On Sun, 30 Jan 2022, Andrew G. Morgan wrote:
> 
> > Securebits strongly influence the way Capabilities work for a process,
> > make them visible in the proc status files.
> 
> My concern is that this might break some existing userspace code which 
> parses the status file.

I don't think anyone should be using that file expecting the fields
in a certain order.  No 'grep "^VmRSS:" /proc/self/status' type of
use is going to be broken by this patch.  Do you have something else
in mind?

-serge