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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 61BE5C43332 for ; Sat, 21 Mar 2020 20:07:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3320C2077D for ; Sat, 21 Mar 2020 20:07:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584821244; bh=h4v4wi6KGC3a9U9y2Qw8czg3F1zTRdh/7i26t05GpTY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=kDe3lwmJmxitAZph4i7UlAaKAam4iErvn7Ryci8lNcxi7y6hsVk4PC2JMx0aLg0wj 0vPz2bGf+CYl54DvVUYvaKrG5hXOcGxxZDrCDX1JkZlu3qFNLQ1j7woLMEr/gjdlLm GK0oEalZf3A0/ZXKwN6NDmziG6SBUkQG3B/5bl9E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727264AbgCUUHV (ORCPT ); Sat, 21 Mar 2020 16:07:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:51934 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726366AbgCUUHV (ORCPT ); Sat, 21 Mar 2020 16:07:21 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (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 5949320775; Sat, 21 Mar 2020 20:07:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584821237; bh=h4v4wi6KGC3a9U9y2Qw8czg3F1zTRdh/7i26t05GpTY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=pzJITh7ITYXGZpUjF5HjEePgv3Kena4RiSnw3WN9ybb2P4TzUF2jCHnzM6Eq7HLJH 6YXPw5IdmlF9NgqcCtS/RfzDKymT8ReLa2YX03XfgAQMfzh4x6AX9LGPKbSLwI1jgi 0BMMc4GP3vGfk5AWYmBnv3xYZs1+N/1hVY2kpmnk= Date: Sat, 21 Mar 2020 13:07:16 -0700 From: Andrew Morton To: syzbot Cc: hannes@cmpxchg.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, schatzberg.dan@gmail.com, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Subject: Re: WARNING in alloc_page_buffers Message-Id: <20200321130716.c1da54e6e5b9897ae5dfde38@linux-foundation.org> In-Reply-To: <000000000000f0373505a162d972@google.com> References: <000000000000f0373505a162d972@google.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Sat, 21 Mar 2020 13:00:18 -0700 syzbot wrote: > syzbot found the following crash on: > > HEAD commit: 770fbb32 Add linux-next specific files for 20200228 That's nearly four weeks ago? > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=13507489e00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=576314276bce4ad5 > dashboard link: https://syzkaller.appspot.com/bug?extid=0985c7ea18137bf0c4ca > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b970e5e00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=178e99f9e00000 > > The bug was bisected to: > > commit c9e1feb96bd90a4b51d440a015ba2f1c0562de59 > Author: Dan Schatzberg > Date: Tue Feb 25 04:14:08 2020 +0000 > > loop: charge i/o to mem and blk cg That commit was dropped on March 3.