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 BEB60C2BA2B for ; Wed, 15 Apr 2020 04:55:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8119A20784 for ; Wed, 15 Apr 2020 04:55:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8119A20784 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0393A8E0005; Wed, 15 Apr 2020 00:55:06 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F2C708E0001; Wed, 15 Apr 2020 00:55:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E41198E0005; Wed, 15 Apr 2020 00:55:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0060.hostedemail.com [216.40.44.60]) by kanga.kvack.org (Postfix) with ESMTP id CA8388E0001 for ; Wed, 15 Apr 2020 00:55:05 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 7AF9B180AD801 for ; Wed, 15 Apr 2020 04:55:05 +0000 (UTC) X-FDA: 76708874970.06.ball48_4985cc7107734 X-HE-Tag: ball48_4985cc7107734 X-Filterd-Recvd-Size: 2765 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Wed, 15 Apr 2020 04:55:05 +0000 (UTC) Received: by mail-il1-f200.google.com with SMTP id c4so2820505ilf.11 for ; Tue, 14 Apr 2020 21:55:05 -0700 (PDT) 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=Y2W+RK5QX6ymnzvXaAg6rFGFyTW39IKvpdZtQG2d1eM=; b=Qs6SsHmMgv6eJT5SJ5XYeDBGrsRf0oPStBC2qltMNbLhCsLbT3CHgs2RoM8dmHboeC yJBLCMYOMOs3QoYY7j9LkX4EfGmwHhgNSMjSu+hnWCwPZHhbLG7UfCOcKDBNIHTxUIij GPjbzlHfwfaUSFdUPSI0h/iMqx+gHpAwjgfa1/XSkBUb8JuX4d3uaVIIKkEZz+KQGr5K RBMZeZ2anFyr+j8eUSyCWGYhZ8ZbyJm525z4b7D17+nB8RVSvoMDw18RbyxFj4aTi4Er pFhf6dHc6Q3xCQNdvQ3qfGyKIzntRDWcDKuj+Wo4xv2jGZiW1e1GmPMOd5nQhA8i/6o5 Bamw== X-Gm-Message-State: AGi0PuYtfXUjr1WMXeAx1PqZSVXNORPoGkBwYjavGFPMBG8uGUFBD8vu dqECvqKQx6ojXmytA7aQ3XeMjHSkIqs7lMmepCNXMT5HzU2T X-Google-Smtp-Source: APiQypLoHsOzgEfyXKGl1uv7QMFA3G0iEexcJWQkFz/EJ2Og/YlYLQkyynZxJlWrP+PyBVAXtw3KwYrchO1YR8DpHflA85WQ9cBY MIME-Version: 1.0 X-Received: by 2002:a05:6602:154a:: with SMTP id h10mr24660899iow.137.1586926504681; Tue, 14 Apr 2020 21:55:04 -0700 (PDT) Date: Tue, 14 Apr 2020 21:55:04 -0700 In-Reply-To: <20200415043553.GH90651@mit.edu> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000098a5d505a34d1e48@google.com> Subject: Re: BUG: unable to handle kernel NULL pointer dereference in generic_perform_write (2) From: syzbot To: adilger.kernel@dilger.ca, akpm@linux-foundation.org, dan.j.williams@intel.com, jack@suse.cz, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot has tested the proposed patch and the reproducer did not trigger crash: Reported-and-tested-by: syzbot+bca9799bf129256190da@syzkaller.appspotmail.com Tested on: commit: 5b8b9d0c Merge branch 'akpm' (patches from Andrew) git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git kernel config: https://syzkaller.appspot.com/x/.config?x=23c5a352e32a1944 dashboard link: https://syzkaller.appspot.com/bug?extid=bca9799bf129256190da compiler: gcc (GCC) 9.0.0 20181231 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=15524a00100000 Note: testing is done by a robot and is best-effort only.