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=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 88B44C4320E for ; Fri, 23 Jul 2021 13:09:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6823F60E8C for ; Fri, 23 Jul 2021 13:09:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235211AbhGWM22 (ORCPT ); Fri, 23 Jul 2021 08:28:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45262 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235202AbhGWM21 (ORCPT ); Fri, 23 Jul 2021 08:28:27 -0400 Received: from mail-vk1-xa32.google.com (mail-vk1-xa32.google.com [IPv6:2607:f8b0:4864:20::a32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E6CAC061575; Fri, 23 Jul 2021 06:08:59 -0700 (PDT) Received: by mail-vk1-xa32.google.com with SMTP id d16so375436vkp.4; Fri, 23 Jul 2021 06:08:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=kVBfC6co2VsHDzY9tpVsgW1qF6lGCAzJxuznl8I/9GE=; b=S7yHpcB0mbS1di7E5oWpwhpxwwZ2/SiAg+gx57RoBO0r4PvBN81gZFYvQSTBVXpkri YUOnreKPJdPh9H7ClkUAZtgq0HexnNabAP1nftaQovyy214cqPbsC6xU4xPi1+6HF1aQ 0/j1uTvscTLhK0PE1Z7bgekrYAnESQqxHVEzA9/3FtLOiv9IYrictiJcIOD9tYL/8BhY j6G4P7zHrG+t5k0sGGAWuPMDn1svydRZ908pPwvtPqK6FntCVHG2lDxUUv55YIWuRAgq egB46wg9CNEMt/9XXbGl7Q0krzeJRHgSKKZUd3NZO93FEIN9Sb3pTNA48ud83njIAzza XADA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=kVBfC6co2VsHDzY9tpVsgW1qF6lGCAzJxuznl8I/9GE=; b=eywsFOmv784Gw5Yckw01Gz/2Na5yfO5kYtO5UbfvYX5tSxjAAubPYw+vZz4WPQUmnb yGKqmhaXRHIPRbc9RV8nHfuZj93wJ11/dAZXMDa2RE/tnY65qS2g8FpPfbtk1SD24qoz T5j3QtsTx/mZz1wbkVcN4qAnygd7jVRIvZSXME4zFNvohBLEwY+FRJzZI9TYk4SMhIAF 3bXHcBz2wP4exALn/nw9MKDAlbrNe0ajnJLH3OGIGpwLTggdTFIxmU9D9Jklu6XYRLtR RNateaKpUrnACuYfsuhVyaG6WcC1CkPrwotHCoPAlDN20L33QKxQE3hJSiym0s+Ql6dL 59Rw== X-Gm-Message-State: AOAM5328ZzETKEnGqgoivO3GeVzjy+qFpcxDn4v9FFb8aXu2q0jk2ely rzLJYreWVNga3Ppj+gb7Z2dCHdZSQCa/K5QTBTU= X-Google-Smtp-Source: ABdhPJzm4WOjliZN4J/jn8+c1kgtEDm9FOG1JP5fQJzmTsotnWi265Upc6UbXRPTWQZb1IP+PBk1yHG5isNcMSmo9bU= X-Received: by 2002:ac5:c888:: with SMTP id n8mr3669958vkl.22.1627045738539; Fri, 23 Jul 2021 06:08:58 -0700 (PDT) MIME-Version: 1.0 References: <8057650.rSI8SBESIY@natalenko.name> <98103103-c517-59d2-a4d6-9b0758cbdfc1@kernel.dk> In-Reply-To: <98103103-c517-59d2-a4d6-9b0758cbdfc1@kernel.dk> From: jim.cromie@gmail.com Date: Fri, 23 Jul 2021 09:08:32 -0400 Message-ID: Subject: Re: 5.14.0-rc1 KASAN use after free To: Jens Axboe Cc: Oleksandr Natalenko , LKML , Paolo Valente , linux-block@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jul 18, 2021 at 5:58 PM Jens Axboe wrote: > > On 7/18/21 3:08 PM, Oleksandr Natalenko wrote: > > + Paolo, Jens et al. > > > > On =C4=8Dtvrtek 15. =C4=8Dervence 2021 16:32:29 CEST jim.cromie@gmail.c= om wrote: > >> hi all, > >> > >> I noticed this report this morning, from 3 days ago, > >> about 10 minutes after boot. > >> Its easiest to ignore it, and I dont want to make a fuss, > >> but it looks useful to someone > >> > >> > >> [ 33.663464] Bluetooth: RFCOMM ver 1.11 > >> [ 646.343628] > >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ > >> 646.343649] BUG: KASAN: use-after-free in bfq_get_queue+0x47d/0x900 [ > >> 646.343680] Read of size 8 at addr ffff88810d864a00 by task > >> journal-offline/1639 > > There are only a few commits between 5.13 and master in this area, see > attached. I'd just start reverting from the top, one by one, and see > which one is causing the issue. Jim, would that be feasible? > oops, didn't see this earlier. It hasnt happened since, I can try to recreate mid-next-week > -- > Jens Axboe >