linux-kernel - Re: linux-next: build failure after merge of the aio tree

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20160316140713.GC14746@kvack.org>
Date:	Wed, 16 Mar 2016 10:07:13 -0400
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linuxppc-dev@...ts.ozlabs.org,
	Andy Shevchenko <andy.shevchenko@...il.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-next <linux-next@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	Al Viro <viro@...iv.linux.org.uk>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: Re: linux-next: build failure after merge of the aio tree

On Wed, Mar 16, 2016 at 02:59:38PM +0100, Arnd Bergmann wrote:
> On Wednesday 16 March 2016 13:12:36 Andy Shevchenko wrote:
> > 
> > > I've also sent a patch that fixes the link error on ARM and that should
> > > work on all other architectures too.
> > 
> > In case of avr32 signalfd_read() fails. Does your patch help with it as well?
> > 
> > P.S. Bisecting shows same culprit: 150a0b4905f1 ("aio: add support for
> > async openat()")
> 
> I don't know. What is the symptom on avr32? My patch only removes the
> get_user() instances on 64-bit values and replaces them with a
> single copy_from_user() call.

Which is the wrong fix.  Arch code should be able to handle 64 bit values 
in all the get/put_user() variants.  We use 64 bit variables all over the 
place in interfaces to userspace.

		-ben