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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 EB557C33CA9 for ; Mon, 13 Jan 2020 20:02:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C630C2080D for ; Mon, 13 Jan 2020 20:02:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728641AbgAMUCC (ORCPT ); Mon, 13 Jan 2020 15:02:02 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:40167 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727331AbgAMUCC (ORCPT ); Mon, 13 Jan 2020 15:02:02 -0500 Received: by mail-io1-f70.google.com with SMTP id e200so6491847iof.7 for ; Mon, 13 Jan 2020 12:02:01 -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=0WQiXIsAJotmOovsOJkAJagLAGPEvGVf6LY+V+HPFS4=; b=VsceXNIniUySU4vfCk/IiBrVPdN0KSyB7jl48GWxmf72dIJZnehy8QSy40rH1siVgr Qx4fk7Wg7RKrMfhVze778BhrVEVET4o+EPoyVi3evd7hAOKdke/MNJDsBP4dxDkJBk8u saXReoNCCQ90TeKYlxFeEI+e1sqEofqrptqQ5EtjIU3+TsErhvEbGwrKimoLoZtaFzTH 7t0yqKizYHT3HNFlJb0HmyQO4kAtTHOziGZQX44tjj98+epUfr3vIHM69QPibMeFBDsn hV/jm8d8JlJeRl86satbJihFG87+4KwgKu+vy7m21NT2vtTacrl6y/A+TwCE3ugJi7Cv 2XPg== X-Gm-Message-State: APjAAAXFY2ZJB5/pL5MoqiLo9OKuoBaofWTNj8BXRZAZxMy7dQvcS9oL nV4LZhFMRXTVppMI+iSTLXKl1Ll9r/b1CezP3sDVrg+1hMAv X-Google-Smtp-Source: APXvYqzdqdMaIuaZGYk4ZSDZ03EA/5GJly7oM+QoISUNLEYZzj5obAzt8M8gozRrhbdr7aFXuqtPDKn7Alg0OqUZ9748hJL8D8I9 MIME-Version: 1.0 X-Received: by 2002:a02:c611:: with SMTP id i17mr16208083jan.28.1578945721401; Mon, 13 Jan 2020 12:02:01 -0800 (PST) Date: Mon, 13 Jan 2020 12:02:01 -0800 In-Reply-To: <0000000000008dcde00590922713@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d80d1a059c0af28a@google.com> Subject: Re: WARNING: refcount bug in chrdev_open From: syzbot To: gregkh@linuxfoundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, will@kernel.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot suspects this bug was fixed by commit: commit 68faa679b8be1a74e6663c21c3a9d25d32f1c079 Author: Will Deacon Date: Thu Dec 19 12:02:03 2019 +0000 chardev: Avoid potential use-after-free in 'chrdev_open()' bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14412659e00000 start commit: 81b6b964 Merge branch 'master' of git://git.kernel.org/pub.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=d98e4bd76baeb821 dashboard link: https://syzkaller.appspot.com/bug?extid=1c85a21f1c6bc88eb388 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=147ad0a6e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15483312e00000 If the result looks correct, please mark the bug fixed by replying with: #syz fix: chardev: Avoid potential use-after-free in 'chrdev_open()' For information about bisection process see: https://goo.gl/tpsmEJ#bisection