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From: Joerg Roedel <joro@8bytes.org>
To: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	x86@kernel.org, Dmitry Safonov <0x7f454c46@gmail.com>,
	Joerg Roedel <jroedel@suse.de>,
	linux-kernel@vger.kernel.org, Borislav Petkov <bp@suse.de>
Subject: Re: [PATCH] x86/signals: Fix lower/upper bound reporting in compat siginfo
Date: Tue, 4 Apr 2017 23:53:49 +0200	[thread overview]
Message-ID: <20170404215349.GT7266@8bytes.org> (raw)
In-Reply-To: <82bd374d-304a-c719-94ba-ba35e7b1696d@linux.intel.com>

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.


	Joerg

  reply	other threads:[~2017-04-04 21:53 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-04 16:15 Joerg Roedel
2017-04-04 16:56 ` Dave Hansen
2017-04-04 21:53   ` Joerg Roedel [this message]
2017-04-05 22:45     ` Dave Hansen
2017-04-05  8:58 ` [tip:x86/urgent] " tip-bot for Joerg Roedel

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