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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 61A22C282DC for ; Wed, 22 May 2019 12:19:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2BCDA20675 for ; Wed, 22 May 2019 12:19:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2BCDA20675 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BC6F66B0003; Wed, 22 May 2019 08:19:15 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B77E86B0006; Wed, 22 May 2019 08:19:15 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A67BD6B0007; Wed, 22 May 2019 08:19:15 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-lj1-f200.google.com (mail-lj1-f200.google.com [209.85.208.200]) by kanga.kvack.org (Postfix) with ESMTP id 3E4B66B0003 for ; Wed, 22 May 2019 08:19:15 -0400 (EDT) Received: by mail-lj1-f200.google.com with SMTP id m4so331520lji.5 for ; Wed, 22 May 2019 05:19:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:subject:to:cc :references:from:message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=+9fW0PRxz+4bfLfbCFiuVFbnUn0YIXpiH5KfbMS39MA=; b=tdFfMqttGi4bdFa+yY5IARMLyT0TTSJ3RXVGkfeCLHfrtMjHKjp0DxRAWvLTxGmiLO 4YVgJsn+M/BRTNeawF0HRHrxkJ5Cl+liGOmYYCdqil17AcN9ukIEHmWtLQtgRmvtMWan wh2IffDpjxgNIc21oo/3u9ekQ3YYPASqc3CjLltHwr1cTdeVabjD0h9lLlr+kZPwnXei rYxtA8PSwgiEDYlscmGX9D5QOIye+l4maaCcSqk+z2ivzeK/XZIJJyAjVh7M5Pka8yS0 h2nlD5UNkPAE04RH/s7Ie1bd+iy4P3WH7UE1YKMBfh6yN+Ecs50YjpR1VrLFf5q1lPei fEng== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of aryabinin@virtuozzo.com designates 185.231.240.75 as permitted sender) smtp.mailfrom=aryabinin@virtuozzo.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=virtuozzo.com X-Gm-Message-State: APjAAAUq2zwe3DP7pYN2U2NzfKE5FpttMT+RQwtOpdnsuJYCprAPG2C2 GeswIUsfHSgWVEHB9SiFpsZtxsqCK3JSFnCYfD715x3o929j/bgwVUK7sJ6DSEOmH1sLxuoMnxP y+GbGKohDP88x/bKn4141+cV8gy3zh1cJcWRK4Cp+GqqnSdkwghn+WQimKbN5s/e7Cg== X-Received: by 2002:a19:2b4d:: with SMTP id r74mr32022053lfr.96.1558527554540; Wed, 22 May 2019 05:19:14 -0700 (PDT) X-Google-Smtp-Source: APXvYqyrChk1VmtV21Na0rCgEwmGqz+eFqwzjY1Qp9rC6e6twDDZif/ltcVGa1lh/42w/+LagUnl X-Received: by 2002:a19:2b4d:: with SMTP id r74mr32022013lfr.96.1558527553456; Wed, 22 May 2019 05:19:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1558527553; cv=none; d=google.com; s=arc-20160816; b=lA2nT8wTJ8kr2QUqaiqvqp6cchq+IuXhXP49MGdkVQ9XL2PzQw0XvSaFiacV0TWmSO JN5j0U8Oj8W6JZdSEH3qg9VQGa6CxOMZTt02w8l93KhZF2BCSmXa+dDwwuQlenHQ9N2a 64/TEi4kVIjK2M0SV4Ibbns8KTAPtbMp1AFcrDSe2U66kq6pkENQ31phCScvP9O2v70K A6eghIt+X5QKVX7N5r/+axIExu9gvY8OOXb+CvK32fGBON887dOPVT1SQe+V4aXJwgsD MnQjHaMMlywe8RYmSpVEU83/1CLa8Eq4lcHSc9nywOcjYjQ4iGBakH0vlhQd2SEFbQg+ BEpg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:from:references:cc:to:subject; bh=+9fW0PRxz+4bfLfbCFiuVFbnUn0YIXpiH5KfbMS39MA=; b=R0SWrCeZTn9nLShOGJTO27p7KHKDgpuQV9qrWn2rTQO7fB4bw3JD/Kcedfi/InZX8S n7kgju6vrXmqYXkWI4oedHzEQESBTTI9Fncnvk0rsTf57c239Lf5iGq6MeDiHZiIt+yt wvBsUqPjDKmX960GtflpvqkIf6R1J30P4DM9MuksGdcg8yc4qmFPkg0BuDsZkr1EgYGS kE9v8MT6Sax4dam/IYFCwIceI9vcCTeoFMCv0egEAt/hdw14MxJKgFB/qV5eCig0IBFQ 1VjZ/uiGX3b+RreTHTnlyFkl4LsB1/NT/CFpOlPZnvhV9stMYi1krU5Snv3KwjysIv9i OzpQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of aryabinin@virtuozzo.com designates 185.231.240.75 as permitted sender) smtp.mailfrom=aryabinin@virtuozzo.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=virtuozzo.com Received: from relay.sw.ru (relay.sw.ru. [185.231.240.75]) by mx.google.com with ESMTPS id t10si11249698lji.37.2019.05.22.05.19.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 22 May 2019 05:19:13 -0700 (PDT) Received-SPF: pass (google.com: domain of aryabinin@virtuozzo.com designates 185.231.240.75 as permitted sender) client-ip=185.231.240.75; Authentication-Results: mx.google.com; spf=pass (google.com: domain of aryabinin@virtuozzo.com designates 185.231.240.75 as permitted sender) smtp.mailfrom=aryabinin@virtuozzo.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=virtuozzo.com Received: from [172.16.25.12] by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1hTQDA-0003Xw-1H; Wed, 22 May 2019 15:19:12 +0300 Subject: Re: [PATCH v3] mm/kasan: Print frame description for stack bugs To: Marco Elver , dvyukov@google.com, glider@google.com, andreyknvl@google.com, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kasan-dev@googlegroups.com References: <20190522100048.146841-1-elver@google.com> From: Andrey Ryabinin Message-ID: Date: Wed, 22 May 2019 15:19:30 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190522100048.146841-1-elver@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit 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 5/22/19 1:00 PM, Marco Elver wrote: > This adds support for printing stack frame description on invalid stack > accesses. The frame description is embedded by the compiler, which is > parsed and then pretty-printed. > > Currently, we can only print the stack frame info for accesses to the > task's own stack, but not accesses to other tasks' stacks. > > Example of what it looks like: > > [ 17.924050] page dumped because: kasan: bad access detected > [ 17.924908] > [ 17.925153] addr ffff8880673ef98a is located in stack of task insmod/2008 at offset 106 in frame: > [ 17.926542] kasan_stack_oob+0x0/0xf5 [test_kasan] > [ 17.927932] > [ 17.928206] this frame has 2 objects: > [ 17.928783] [32, 36) 'i' > [ 17.928784] [96, 106) 'stack_array' > [ 17.929216] > [ 17.930031] Memory state around the buggy address: > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=198435 > Signed-off-by: Marco Elver Reviewed-by: Andrey Ryabinin