Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73611C678D4 for ; Thu, 2 Mar 2023 13:23:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229711AbjCBNX0 (ORCPT ); Thu, 2 Mar 2023 08:23:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229449AbjCBNXY (ORCPT ); Thu, 2 Mar 2023 08:23:24 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B1561421C; Thu, 2 Mar 2023 05:23:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=MBSijBkL6qrcNLxK5wTEA5G9IQhSmVi9FlzoMJu1guM=; b=q5Iqf/wvr7dnc8RUnfJqJjgQSv 7d9aK0GlNvEYZSF7M/VlM6Lr8W7eBHRVZmAk6Cbj4U0/0HxLnYN6uE+MMEGUg6vHNdUeeggQvMZe2 o0Me9E80vG0jPQrVUpM4N5c77KBgHHb83w06uB8Fhe6VDE2X/LNVolzl56nftYaHr3yAGkaK8SF2u IO4bd5BMCUSguEkpxcVeWpXDykAiH1T4oI7l6yuYmo/ElJui+RmepSdI7slviWOGFHx16PIXpqVPt goPiBOQHymwTy8PR1qxvVnZ0NN1qiM1BDaE97GEqW7KxNNwPfB+/6q4YWaR678wjxl8HutKidg+Nc ccLnteWg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pXith-002QVV-P7; Thu, 02 Mar 2023 13:23:01 +0000 Date: Thu, 2 Mar 2023 13:23:01 +0000 From: Matthew Wilcox To: syzbot Cc: akpm@linux-foundation.org, davem@davemloft.net, dvyukov@google.com, edumazet@google.com, elver@google.com, glider@google.com, hdanton@sina.com, kasan-dev@googlegroups.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [mm?] INFO: task hung in write_cache_pages (2) Message-ID: References: <000000000000e794f505f5e0029c@google.com> <00000000000099b9c905f5e9a820@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000000000099b9c905f5e9a820@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 02, 2023 at 04:06:28AM -0800, syzbot wrote: > syzbot has bisected this issue to: > > commit 17bb55487988c5dac32d55a4f085e52f875f98cc > Author: Matthew Wilcox (Oracle) > Date: Tue May 17 22:12:25 2022 +0000 > > ntfs: Remove check for PageError Syzbot has bisected to the wrong commit. That code (a) isn't going to be executed by this test, since it doesn't have an ntfs image and (b) was dead. Never could have been executed. > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13fd6e54c80000 > start commit: 489fa31ea873 Merge branch 'work.misc' of git://git.kernel... > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=10036e54c80000 > console output: https://syzkaller.appspot.com/x/log.txt?x=17fd6e54c80000 > kernel config: https://syzkaller.appspot.com/x/.config?x=cbfa7a73c540248d > dashboard link: https://syzkaller.appspot.com/bug?extid=0adf31ecbba886ab504f > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16dc6960c80000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16f39d50c80000 > > Reported-by: syzbot+0adf31ecbba886ab504f@syzkaller.appspotmail.com > Fixes: 17bb55487988 ("ntfs: Remove check for PageError") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection