linux-kernel - Re: [PATCH 2/4] leaking_addresses: simplify path skipping

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Date:   Sun, 25 Feb 2018 18:26:31 -0700
From:   Tycho Andersen <tycho@...ho.ws>
To:     "Tobin C. Harding" <me@...in.cc>
Cc:     Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] leaking_addresses: simplify path skipping

Hi Tobin,

On Mon, Feb 19, 2018 at 01:50:47PM +1100, Tobin C. Harding wrote:
> -# Do not parse these files under any subdirectory.
> -my @skip_parse_files_any = ('0',
> -			    '1',
> -			    '2',
> -			    'pagemap',
> -			    'events',
> -			    'access',
> -			    'registers',
> -			    'snapshot_raw',
> -			    'trace_pipe_raw',
> -			    'ptmx',
> -			    'trace_pipe');

It might be worth adding 'syscall' here; the pointers listed are user
pointers, and negative syscall args will show up like kernel pointers,
e.g. I get this output, which is spurious:

/proc/31808/syscall: 0 0x3 0x55b107a38180 0x2000 0xffffffffffffffb0 0x55b107a302d0 0x55b107a38180 0x7fffa313b8e8 0x7ff098560d11

Cheers,

Tycho