From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757062AbcJ3S0f (ORCPT ); Sun, 30 Oct 2016 14:26:35 -0400 Received: from omzsmtpe02.verizonbusiness.com ([199.249.25.209]:49887 "EHLO omzsmtpe02.verizonbusiness.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754252AbcJ3S0e (ORCPT ); Sun, 30 Oct 2016 14:26:34 -0400 X-Greylist: delayed 585 seconds by postgrey-1.27 at vger.kernel.org; Sun, 30 Oct 2016 14:26:34 EDT X-IronPort-Anti-Spam-Filtered: false From: "Levin, Alexander" Cc: Joe Korty , "linux-kernel@vger.kernel.org" , Linus Torvalds , "Levin, Alexander" X-IronPort-AV: E=Sophos;i="5.31,423,1473120000"; d="scan'208";a="10453781" To: Al Viro Date: Sun, 30 Oct 2016 14:16:32 -0400 Subject: Re: [4.1 backport trouble] Re: BUGreport: fix minor infoleak in get_user_ex() Thread-Topic: [4.1 backport trouble] Re: BUGreport: fix minor infoleak in get_user_ex() Thread-Index: AdIy2cTip7qz16VFRUGj4WKJwSWt7A== Message-ID: <20161030181632.GB2574@sasha-lappy> References: <20161027193210.GA23006@zipoli.ccur.com> <20161028000355.GK19539@ZenIV.linux.org.uk> <20161028020210.GL19539@ZenIV.linux.org.uk> In-Reply-To: <20161028020210.GL19539@ZenIV.linux.org.uk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mutt/1.5.24 (2015-08-30) acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id u9UIQfxr025242 On Thu, Oct 27, 2016 at 10:02:10PM -0400, Al Viro wrote: > ... and frankly, backporting 548acf19234d would be my preference. It's a bit > more intrusive than needed (_ASM_EXTABLE_FAULT is used only in memcpy_mcsafe(), > which is used only by pmem and it's the only reason for passing the trap > number to fixup_exception()), but AFAICS it's fairly safe. Objections? I've grabbed 548acf19234d for 4.1, thanks! -- Thanks, Sasha