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Date:   Tue, 4 Apr 2017 23:53:49 +0200
From:   Joerg Roedel <>
To:     Dave Hansen <>
Cc:     Thomas Gleixner <>,
        Ingo Molnar <>,
        "H. Peter Anvin" <>,,
        Dmitry Safonov <>,
        Joerg Roedel <>,,
        Borislav Petkov <>
Subject: Re: [PATCH] x86/signals: Fix lower/upper bound reporting in compat

On Tue, Apr 04, 2017 at 09:56:45AM -0700, Dave Hansen wrote:
> On 04/04/2017 09:15 AM, Joerg Roedel wrote:
> > Put the right values from the original siginfo into the
> > userspace compat-siginfo.
> > 
> > This fixes the 32-bit mpx tabletest on a 64-bit kernel.
> Ugh, thanks for finding that.

Yeah, I was also looking at the vaddrexhaust test, but is that supposed
to work? It does pretty weird things at least, on 64 bit the function
effectivly does nothing because nr_to_fill evaluates to 0 there, and on
32 bit it gets a (probably #BF) exception which is not caught, so that
the test fails.

I am a bit confused, but maybe I just didn't stare long enough at it :-)
Hope you can sched some light on it.


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