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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, 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 1C05DC64E8A for ; Mon, 30 Nov 2020 13:08:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCDA820855 for ; Mon, 30 Nov 2020 13:08:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726162AbgK3NIz (ORCPT ); Mon, 30 Nov 2020 08:08:55 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:41251 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725298AbgK3NIy (ORCPT ); Mon, 30 Nov 2020 08:08:54 -0500 Received: by mail-io1-f72.google.com with SMTP id w28so7159459iox.8 for ; Mon, 30 Nov 2020 05:08:39 -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=rRssb1RG/kVfj9BXppmJh4PLBuJGRMgyZUW2mrbT0Iw=; b=Nz6mJM51ZSk1gI2KY1dc20g0hl4lynEpvinNImU05niSDW2eHFeHFHPvcr1VDHghSh 2mTzmt58/vGddrlzQqh76TrsDHKgOVGaUBWgbT1YC7sEpPpKOW2xQRfFukbVZue+5nEi y4lmmcFxfbcFNVfKyldTC4PZp4R4AJNCJTB5nPtbV7LuIlh5BbZkBfsTHLW2XUoR9VdA JbRMjAfPpSa/Iq3Sn9Sk1CTiIK58g9VviAbT4jz1TpHqOd+R0Glg6R1K5bR+w8G/8Q8s glqIGS9DD6oiYyxne7gaQUk8OFE//D3bX3JR70ogn5uRL+S8cueL/tNSyUt29n2xKD97 BPjQ== X-Gm-Message-State: AOAM530TiVSb+7o7peBnYArbR5TWO610W4dGxgPaK1CIOYXhBvmfcXUL gdjmj4JB13qPyVkFPG4Y/LkAAwHvr9rXMWNL7NLXkhAyqlAO X-Google-Smtp-Source: ABdhPJxSLN0kD1nuaHczO+upJ1xtHcOKFyWTuZsa4dIoHVU2hsy50Y7Bd4ZokCuo5JbAIXbX7jV7haKv9+Np8H71t9simuiO+6wS MIME-Version: 1.0 X-Received: by 2002:a02:cd87:: with SMTP id l7mr2834400jap.117.1606741692313; Mon, 30 Nov 2020 05:08:12 -0800 (PST) Date: Mon, 30 Nov 2020 05:08:12 -0800 In-Reply-To: <000000000000b8a70905b54ef5ca@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d0f2fb05b552b3f3@google.com> Subject: Re: KASAN: use-after-free Write in kernfs_path_from_node_locked From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, davem@davemloft.net, dsahern@kernel.org, gregkh@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, liuhangbin@gmail.com, netdev@vger.kernel.org, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, tj@kernel.org, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has bisected this issue to: commit 0f818c4bc1f3dc0d6d0ea916e0ab30cf5e75f4c0 Author: Axel Rasmussen Date: Tue Nov 24 05:37:42 2020 +0000 mm: mmap_lock: add tracepoints around lock acquisition bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1626291d500000 start commit: 6174f052 Add linux-next specific files for 20201127 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=1526291d500000 console output: https://syzkaller.appspot.com/x/log.txt?x=1126291d500000 kernel config: https://syzkaller.appspot.com/x/.config?x=79c69cf2521bef9c dashboard link: https://syzkaller.appspot.com/bug?extid=19e6dd9943972fa1c58a syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c3351d500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14c28809500000 Reported-by: syzbot+19e6dd9943972fa1c58a@syzkaller.appspotmail.com Fixes: 0f818c4bc1f3 ("mm: mmap_lock: add tracepoints around lock acquisition") For information about bisection process see: https://goo.gl/tpsmEJ#bisection