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=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT 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 F1493C10F11 for ; Wed, 24 Apr 2019 16:42:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C062D21901 for ; Wed, 24 Apr 2019 16:42:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556124146; bh=/iCMjQ9JJbTYq34rSaD39BCI0JgHs9SOeti6T+YXQUk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=hKBVfUeaM9O3cidXFVgycJoD0LvIUxgRtho/4hZazNPmNeSknIbqiwyZ9NdB2+jsm p74cPOfBPCvHalpdLi52HckVCYdNA3Kow2b0jCEh8ZrxO5bhXBstHUOtqT4h5GXj5Y /h/rUfXoQYR60gVLOjcRN3VjAcX9V7AH1ySb0K9I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732310AbfDXQm0 (ORCPT ); Wed, 24 Apr 2019 12:42:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:49974 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731345AbfDXQm0 (ORCPT ); Wed, 24 Apr 2019 12:42:26 -0400 Received: from localhost (62-193-50-229.as16211.net [62.193.50.229]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8C81A218FE; Wed, 24 Apr 2019 16:42:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556124145; bh=/iCMjQ9JJbTYq34rSaD39BCI0JgHs9SOeti6T+YXQUk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=b4tOa5CZ1eLKT07chKgbGbqEX2j1P7Aj0xPXJNNqPMZP5WOVLZ/opXePeKnuzAVli pCa/T6KxSUVlfC9Hj+01TLWjW+jAv3+X3Twg+O3XO4y3rSsJJL8cAHlo7tYedE9E+l +Da4JGyhvENlgSaFcNgw/CX5sfpR+WJ/LxUKmbX0= Date: Wed, 24 Apr 2019 18:42:22 +0200 From: Greg KH To: Zubin Mithra Cc: stable@vger.kernel.org, groeck@chromium.org, darrick.wong@oracle.com, bo.li.liu@oracle.com, viro@zeniv.linux.org.uk Subject: Re: 5a9d929d6e13 ("iomap: report collisions between directio and buffered writes to userspace") Message-ID: <20190424164222.GA21916@kroah.com> References: <20190423163021.GA185682@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190423163021.GA185682@google.com> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Tue, Apr 23, 2019 at 09:30:22AM -0700, Zubin Mithra wrote: > Hello, > > Syzkaller has triggered a kernel WARNING with the following stacktrace when fuzzing a 4.14 kernel. > > Call Trace: > __dump_stack lib/dump_stack.c:17 [inline] > dump_stack+0xb7/0x107 lib/dump_stack.c:53 > panic+0x1c9/0x3ae kernel/panic.c:181 > __warn+0x160/0x1a8 kernel/panic.c:543 > report_bug+0x123/0x18b lib/bug.c:186 > fixup_bug+0x3e/0x77 arch/x86/kernel/traps.c:177 > do_error_trap+0xdd/0x1e6 arch/x86/kernel/traps.c:295 > invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:944 > do_blockdev_direct_IO+0x1b08/0x1b95 fs/direct-io.c:1373 > ext4_direct_IO_write fs/ext4/inode.c:3696 [inline] > ext4_direct_IO+0x8de/0xdad fs/ext4/inode.c:3826 > generic_file_direct_write+0x223/0x36b mm/filemap.c:2927 > __generic_file_write_iter+0x12f/0x2f8 mm/filemap.c:3106 > ext4_file_write_iter+0x97d/0xade fs/ext4/file.c:264 > call_write_iter include/linux/fs.h:1782 [inline] > do_iter_readv_writev+0x1e4/0x27c fs/read_write.c:678 > do_iter_write+0x136/0x18f fs/read_write.c:957 > vfs_iter_write+0x81/0x98 fs/read_write.c:970 > iter_file_splice_write+0x4dc/0x7a6 fs/splice.c:749 > do_splice_from fs/splice.c:851 [inline] > direct_splice_actor+0x11e/0x129 fs/splice.c:1018 > splice_direct_to_actor+0x342/0x5b0 fs/splice.c:973 > do_splice_direct+0x180/0x1ff fs/splice.c:1061 > do_sendfile+0x3e6/0x61c fs/read_write.c:1438 > SYSC_sendfile64 fs/read_write.c:1499 [inline] > SyS_sendfile64+0xe9/0x128 fs/read_write.c:1485 > do_syscall_64+0x203/0x241 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x42/0xb7 > > Could the following patch be applied in order to v4.14.y(The patch is present in v4.19.y)? > 5a9d929d6e13 ("iomap: report collisions between directio and buffered writes to userspace") Now queued up, thanks. greg k-h