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=-8.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 DA95EC4727C for ; Fri, 25 Sep 2020 11:40:04 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 1DFBB21775 for ; Fri, 25 Sep 2020 11:40:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1DFBB21775 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 800978E0006; Fri, 25 Sep 2020 07:40:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7B1B18E0001; Fri, 25 Sep 2020 07:40:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 69FFD8E0006; Fri, 25 Sep 2020 07:40:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0149.hostedemail.com [216.40.44.149]) by kanga.kvack.org (Postfix) with ESMTP id 5392C8E0001 for ; Fri, 25 Sep 2020 07:40:03 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 0DFF72489 for ; Fri, 25 Sep 2020 11:40:03 +0000 (UTC) X-FDA: 77301389886.13.farm70_290aa2927167 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id E185B181415A0 for ; Fri, 25 Sep 2020 11:40:02 +0000 (UTC) X-HE-Tag: farm70_290aa2927167 X-Filterd-Recvd-Size: 2303 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Fri, 25 Sep 2020 11:40:02 +0000 (UTC) Received: from gaia (unknown [31.124.44.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0AAE82075E; Fri, 25 Sep 2020 11:39:58 +0000 (UTC) Date: Fri, 25 Sep 2020 12:39:56 +0100 From: Catalin Marinas To: Andrey Konovalov Cc: Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 36/39] kasan, arm64: print report from tag fault handler Message-ID: <20200925113956.GH4846@gaia> References: <6296d106e480eed388f86e3c8fce10a14bead75a.1600987622.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6296d106e480eed388f86e3c8fce10a14bead75a.1600987622.git.andreyknvl@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Sep 25, 2020 at 12:50:43AM +0200, Andrey Konovalov wrote: > Add error reporting for hardware tag-based KASAN. When CONFIG_KASAN_HW_TAGS > is enabled, print KASAN report from the arm64 tag fault handler. > > SAS bits aren't set in ESR for all faults reported in EL1, so it's > impossible to find out the size of the access the caused the fault. > Adapt KASAN reporting code to handle this case. > > Signed-off-by: Andrey Konovalov > Co-developed-by: Vincenzo Frascino > Signed-off-by: Vincenzo Frascino Reviewed-by: Catalin Marinas