linux-kernel - Re: compiler bug gcc4.6/4.7 with ACCESS

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

Message-ID: <CA+55aFz1oxCgZiY4oWu41fFUbKft9g5_gQXXzAKuW8+pnR72Vw@mail.gmail.com>
Date:	Tue, 11 Nov 2014 16:33:49 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Christian Borntraeger <borntraeger@...ibm.com>
Cc:	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Paolo Bonzini <pbonzini@...hat.com>, KVM <kvm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Andreas Krebbel <Andreas.Krebbel@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>
Subject: Re: compiler bug gcc4.6/4.7 with ACCESS_ONCE and workarounds

On Tue, Nov 11, 2014 at 1:16 PM, Christian Borntraeger
<borntraeger@...ibm.com> wrote:
>
> Are you ok with the patch as is in kvm/next for the time being or shall
> we revert that and replace it with the .val scheme?

Is that the one that was quoted at the beginning of the thread, that
uses barrier()?

I guess as a workaround it is fine, as long as we don't lose sight of
trying to eventually do a better job.

                     Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/