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=-13.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 95D7BC33CB2 for ; Tue, 14 Jan 2020 12:47:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 684FE2072B for ; Tue, 14 Jan 2020 12:47:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Z6qVal04" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728670AbgANMri (ORCPT ); Tue, 14 Jan 2020 07:47:38 -0500 Received: from mail-pl1-f194.google.com ([209.85.214.194]:34247 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726265AbgANMri (ORCPT ); Tue, 14 Jan 2020 07:47:38 -0500 Received: by mail-pl1-f194.google.com with SMTP id g9so2993285plq.1 for ; Tue, 14 Jan 2020 04:47:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=1JrumK/ECPU6a1ytTx+5qrFJa3RX4jsyA9xttpY0r7I=; b=Z6qVal04W6NGAx+lYyAdjnEWBEtNf1ApRQhYHf/0lXOscFvFYUyq9lqP5N5MU3Msbc 1oqLhYdVq2IFYb6miDDRSw8Wyh6FPZ+yEGrHBmPHmVCVCzzYWsUJ7SYQArbdIu2WunIq QjyBwavf5zGHK1EBaiqPlCPMx6z8MCq0ovRuCMEMzs8tHR4dIRlrEYE/VlNxrKaPKKlx S8DDPanjYzemPBWTUIboIuiW2YI6eLvVjjcHr3QuvtpcOe/JXTCYFHwHxe0rQQDoo71b 3LBwcoCp0fQdWmxXPZCJNbLyRH3H1gWTTIfVt1IkSTVOADOqYvR6nvoecBF1uMNEv4rc K1ng== 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; bh=1JrumK/ECPU6a1ytTx+5qrFJa3RX4jsyA9xttpY0r7I=; b=DKVbpAuvKHSMnil8FEsXQi46x0JJv3yTZ/fXUz+8oq3hv2SvvZU6aQFicfJkIdJzPb oK5Q7a/7PhtdPoBtcY6+VIGL3bnRZ/bqp3QHC6gbYSBTJxId9djZxCn2K9Fm79n7eqTb vPs/NOttOpJIPSRw0uf2SzWN5Op1Ej2Zzj7IWs+WIXJqgZWxbBSRfQud/f6QxcyhENCF 6Sz77q+PwPZcu7jZB5/c3GmrooB+3lzn3L2xIIEk2rMK9dMCu+dLiqu1ff9sl/kuI9Gm FdhhFKnXqLKbSKmNa9XJeNryh2S2MeXwyYR+J5nSu1VzKOxKIwgC+IhGThAg1J1nSk0M A1rQ== X-Gm-Message-State: APjAAAVSZ8qOhltNb9Sv2CudyPRQ1JiDEqBjs9oL8BjcqHvt6GlJOYEW WgVBYKhSxn8lsBoWpJqIATyo7kZKX8TXKrzQePMGwA== X-Google-Smtp-Source: APXvYqwOoZeD3//OK/UpkwfRS+hgKDcn9lKUlqGXIsSWDFIvhx6ylhQr9w5Nn+MAebeDxAzwnu2Z2MoPtMjTrEmGX8c= X-Received: by 2002:a17:902:8d8c:: with SMTP id v12mr25249001plo.336.1579006057309; Tue, 14 Jan 2020 04:47:37 -0800 (PST) MIME-Version: 1.0 References: <0000000000008dcde00590922713@google.com> <000000000000d80d1a059c0af28a@google.com> In-Reply-To: <000000000000d80d1a059c0af28a@google.com> From: Andrey Konovalov Date: Tue, 14 Jan 2020 13:47:26 +0100 Message-ID: Subject: Re: WARNING: refcount bug in chrdev_open To: syzbot Cc: Greg Kroah-Hartman , linux-fsdevel@vger.kernel.org, LKML , syzkaller-bugs , Alexander Viro , Will Deacon Content-Type: text/plain; charset="UTF-8" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Mon, Jan 13, 2020 at 9:02 PM syzbot wrote: > > 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()' #syz fix: chardev: Avoid potential use-after-free in 'chrdev_open()' > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000d80d1a059c0af28a%40google.com.