From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6342C43331 for ; Tue, 24 Mar 2020 16:42:43 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 262D62076E for ; Tue, 24 Mar 2020 16:42:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="n4jhsJsV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 262D62076E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-18187-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 25682 invoked by uid 550); 24 Mar 2020 16:42:36 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 25650 invoked from network); 24 Mar 2020 16:42:35 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585068144; bh=WOfzGud1g5SN2D09FFr6f5D5bZvLHXqD/f6Nk08nwls=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=n4jhsJsVjdPyAsPy/iIj6xIx/J0LV3zIHJD+Yg2Uer/lEPe/gi9mzNs0qKAlfbC2T B0pVYRteT5o3wW6brlOqYF33cJPOemzgjgE40onIm3hNo2uP563EqI34H7uPQVCXYT /PFli2Y3mvImQbJnrLZcDKkukYZ6qzmQBXV9jsZc= Date: Tue, 24 Mar 2020 17:42:20 +0100 From: Greg KH To: Will Deacon Cc: linux-kernel@vger.kernel.org, Eric Dumazet , Jann Horn , Kees Cook , Maddie Stone , Marco Elver , "Paul E . McKenney" , Peter Zijlstra , Thomas Gleixner , kernel-team@android.com, kernel-hardening@lists.openwall.com Subject: Re: [RFC PATCH 10/21] kernel-hacking: Make DEBUG_{LIST,PLIST,SG,NOTIFIERS} non-debug options Message-ID: <20200324164220.GC2518746@kroah.com> References: <20200324153643.15527-1-will@kernel.org> <20200324153643.15527-11-will@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200324153643.15527-11-will@kernel.org> On Tue, Mar 24, 2020 at 03:36:32PM +0000, Will Deacon wrote: > The CONFIG_DEBUG_{LIST,PLIST,SG,NOTIFIERS} options can provide useful > security hardening properties outside of debug scenarios. For example, > CVE-2019-2215 and CVE-2019-2025 are mitigated with negligible runtime > overhead by enabling CONFIG_DEBUG_LIST, and this option is already > enabled by default on many distributions: > > https://googleprojectzero.blogspot.com/2019/11/bad-binder-android-in-wild-exploit.html > > Rename these options across the tree so that the naming better reflects > their operation and remove the dependency on DEBUG_KERNEL. > > Cc: Maddie Stone > Cc: Jann Horn > Cc: Kees Cook > Cc: Greg Kroah-Hartman Cc: Paul E. McKenney > Cc: Peter Zijlstra > Signed-off-by: Will Deacon Reviewed-by: Greg Kroah-Hartman