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,URIBL_BLOCKED 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 F3693C2BA2B for ; Wed, 15 Apr 2020 04:55:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD4BA20784 for ; Wed, 15 Apr 2020 04:55:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393149AbgDOEzG (ORCPT ); Wed, 15 Apr 2020 00:55:06 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:56817 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389360AbgDOEzF (ORCPT ); Wed, 15 Apr 2020 00:55:05 -0400 Received: by mail-il1-f199.google.com with SMTP id u19so2719138ilj.23 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=PviCEPBE3E5usT8TgOQ+c1F0U7CEXQ5KfbtwtqMh4Ns6OM2pr6f4iOM/nzRnRa6nEX 88qmQvS0dTvfT25nE9bkKOmO4LBFWwk2k7r+PFBG4riCy0paXf1JQNv9wwTpmUexanpU PufoChziHFSNOkdpZ6IzvfZaoK1C/kIOjzKYoNS59lZ56hXI6FQGxqFvMhqmXOUqcPCl havduZe8d19HNS6bgmG25BU5jj1E8AXyl0PrCn1DtEWWl0hCrDCzSLYCDHqsWtsxP20y b+YdGM2IB6PC7ZTaF7VaEJQk0Xx2KVfpjHkf/bfJIqqhfNfVTAC376JXZjzz9opbTsGh fTzA== X-Gm-Message-State: AGi0PuY/1UAVHvCcOZ8ZqHGMi6sNT6d2l15rr/xTs9/GECffRsw2rANV Y89aNFG6ikPmlif+jMuuCUesJcDEovBOKZKxWlOPwtNrEUdU 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" Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org 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.