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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 BBAD4C433E0 for ; Mon, 1 Mar 2021 12:57:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F3E164DF2 for ; Mon, 1 Mar 2021 12:57:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235172AbhCAM4w (ORCPT ); Mon, 1 Mar 2021 07:56:52 -0500 Received: from mail-io1-f71.google.com ([209.85.166.71]:47091 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235018AbhCAM4s (ORCPT ); Mon, 1 Mar 2021 07:56:48 -0500 Received: by mail-io1-f71.google.com with SMTP id w8so12389767iox.13 for ; Mon, 01 Mar 2021 04:56:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=nQymcUIFYias8gCT71HYL6ML7ZvTT1Jm9pVu9Eri+4I=; b=IxidlpXQ/PrEewKl/9WciDV8OmED2ww+bWflnrDJC3h8MbfQh+nmwfBGML3pjMFhG6 qar82E8qE2xzKjokeD0F3XgpT6aaHupG6j+cAN0a9hp7LJgTXsCMVC2o8HsR0VFzrue6 AYDP41lC8n2uJf1JrMluEkLhZv1dMCgFYyDhmDaS5dQG5G5/2r0y0Vct8W0tA94A+Qec 1Di5UCd9hUTOaedjKuiUJA831mRy5cGw3GPgjJU6IbegM/yZxvnFzkRjP1eVJj4CtPTG Ac4XlS0maymM6Xs4xxWCdm2Hl/DjWF8JJNqgZCubaEhYTvivHoCIrvevz7dUVnedIS89 UUTg== X-Gm-Message-State: AOAM5320mmmwikHZpjVXE+ZxWqkhATUVndHunOb1mvJMCNj9kyYhWup1 HNiLuDAH6sXoUlDdLEST2bSC1daxBgtz2THSQOlkt6sLmlao X-Google-Smtp-Source: ABdhPJxYFXn/qXiKcwCG+2wJepq4EIpagF1BGYLUytmXoy7n1TGaADpttBHAHpNrDhuSufi1cnYq1zSXAwLSv2jaqWsLZUyQm4Wg MIME-Version: 1.0 X-Received: by 2002:a05:6638:2047:: with SMTP id t7mr15580860jaj.134.1614603367762; Mon, 01 Mar 2021 04:56:07 -0800 (PST) Date: Mon, 01 Mar 2021 04:56:07 -0800 In-Reply-To: <0000000000002525c205b604547a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000030504905bc792423@google.com> Subject: Re: KASAN: null-ptr-deref Write in bdi_put From: syzbot To: aik@ozlabs.ru, akpm@linux-foundation.org, axboe@kernel.dk, hch@lst.de, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mingo@kernel.org, mingo@redhat.com, peterz@infradead.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, will@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot suspects this issue was fixed by commit: commit 2d2f6f1b4799428d160c021dd652bc3e3593945e Author: Christoph Hellwig Date: Thu Jan 7 18:36:40 2021 +0000 block: pre-initialize struct block_device in bdev_alloc_inode bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1424a5b6d00000 start commit: 71c061d2 Merge tag 'for-5.11-rc2-tag' of git://git.kernel... git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=33b7f56c5bf0f684 dashboard link: https://syzkaller.appspot.com/bug?extid=aded2f2ab94d81727898 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=143f7fc0d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1089023f500000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: block: pre-initialize struct block_device in bdev_alloc_inode For information about bisection process see: https://goo.gl/tpsmEJ#bisection