Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752167AbdIKQqf (ORCPT ); Mon, 11 Sep 2017 12:46:35 -0400 Received: from scorn.kernelslacker.org ([45.56.101.199]:57286 "EHLO scorn.kernelslacker.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751980AbdIKQqd (ORCPT ); Mon, 11 Sep 2017 12:46:33 -0400 Date: Mon, 11 Sep 2017 12:46:29 -0400 From: Dave Jones To: Shankara Pailoor Cc: linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Andrew Zhu Aday , syzkaller , viro@zeniv.linux.org.uk Subject: Re: WARN_ON_ONCE in fs/iomap.c:993 Message-ID: <20170911164629.4kuuqgklyelld7am@codemonkey.org.uk> Mail-Followup-To: Dave Jones , Shankara Pailoor , linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Andrew Zhu Aday , syzkaller , viro@zeniv.linux.org.uk References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170609 (1.8.3) X-Spam-Note: SpamAssassin invocation failed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 463 Lines: 15 On Mon, Sep 11, 2017 at 06:56:05AM -0400, Shankara Pailoor wrote: > Hi, > > I am fuzzing linux 4.13-rc7 with XFS using syzkaller on x86_64 and I > found the following warning: > > WARNING: CPU: 2 PID: 5391 at fs/iomap.c:993 iomap_dio_rw+0xc79/0xe70 > > Here is a reproducer program: https://pastebin.com/tc014k97 pwrite in one thread, sendfile on another. Same thing trinity has been hitting. See thread "Subject: Re: iov_iter_pipe warning". Dave