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=-4.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 E46E1C433E0 for ; Wed, 29 Jul 2020 22:21:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A8CB520829 for ; Wed, 29 Jul 2020 22:21:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=shutemov-name.20150623.gappssmtp.com header.i=@shutemov-name.20150623.gappssmtp.com header.b="Y9LYoKMx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727852AbgG2WVi (ORCPT ); Wed, 29 Jul 2020 18:21:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726365AbgG2WVh (ORCPT ); Wed, 29 Jul 2020 18:21:37 -0400 Received: from mail-lf1-x142.google.com (mail-lf1-x142.google.com [IPv6:2a00:1450:4864:20::142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86AFBC061794 for ; Wed, 29 Jul 2020 15:21:37 -0700 (PDT) Received: by mail-lf1-x142.google.com with SMTP id 140so13896931lfi.5 for ; Wed, 29 Jul 2020 15:21:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=pXu8OuCl8XPKqUjZK4V7JWQi6YMrByUyT2Rl4z35rjc=; b=Y9LYoKMxXRNo9xRu1W1RcAkN/ZZtus8wohN98GH+lzAizy5vx1oOzOnrdwPZl1AfGJ CX57JUSohfYObl+vy2xZYvHNvUONb2kWTTd3sh+8MwPH0EdZzE+eCanhm7AvKTzFFixB jfrZj34JHqsc8LQx18rkoKptFPodeiPU3odWI2BEAciVxek04O2+tYPRoEmdd3Dw94TI Ipr+Xpw2jPZjTgtZNxvfooceNG5b2MtTSWeVBddA1xBitbhArT0BqfJOKFARNjXvcHzz EXIVSN7QTFCUCXuqK2wLU4I2jLTLkb4FLY1flz7VHGnRmYVVxr4ip5kzm2ABcBE0cTfC EpQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=pXu8OuCl8XPKqUjZK4V7JWQi6YMrByUyT2Rl4z35rjc=; b=t1hhKZyNxARsSYwwsOLftQdNBlqD//cIVRQfhws3SzPqG0EmINF5ecEIyKsOIkaVqX ulmdYYrP0KdhbwA/TWqT4oO8+KXSv5+LvVd31M5YNxRKRj1FoR9Ez44JaFQmER7czySH KPTZ9pU6Kk18keheY/dR1BqDbjc9AK34/ogkcFGIyYJTrx8yHnqHKsC4yhgernk3TLlc cdMM8Dk76k5kZ/rBFw39bv3DRmyW3vjGnWnp4CGyxfd0BmLHZe8F2w7Ebs9ADdX6zbbm FfI5rOYrEGmc2vmZ4fJgqccsb9U2KO/t0ThVA46tAmU8qX8UeRmRzGFgRNUPT5Pj3sSP oDWQ== X-Gm-Message-State: AOAM5323X9tuMckdb2AfWq2WVpROg19ttDTmYWDc5b2/1fybkEFM1EK6 Q2zFLo56NupDJXyQUzXmotZtpw== X-Google-Smtp-Source: ABdhPJyz4egeo7b/obsOl2OCYxxRlBJryZHGBbVCSpuZ6IBZYcUgnwYDKzpRYsTWz4eF/vmVr3VfAg== X-Received: by 2002:a19:c752:: with SMTP id x79mr154133lff.197.1596061295935; Wed, 29 Jul 2020 15:21:35 -0700 (PDT) Received: from box.localdomain ([86.57.175.117]) by smtp.gmail.com with ESMTPSA id 193sm882389lfa.90.2020.07.29.15.21.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Jul 2020 15:21:35 -0700 (PDT) Received: by box.localdomain (Postfix, from userid 1000) id EE1CC102152; Thu, 30 Jul 2020 01:21:39 +0300 (+03) Date: Thu, 30 Jul 2020 01:21:39 +0300 From: "Kirill A. Shutemov" To: syzbot Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Subject: Re: kernel BUG at mm/internal.h:LINE! (2) Message-ID: <20200729222139.nhok7opbvh6vr7t3@box> References: <000000000000c276c005ab9a0fb1@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000c276c005ab9a0fb1@google.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 29, 2020 at 01:04:21PM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 68845a55 Merge branch 'akpm' into master (patches from And.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17c86c54900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f87a5e4232fdb267 > dashboard link: https://syzkaller.appspot.com/bug?extid=f62749569eab36774dc5 > compiler: gcc (GCC) 10.1.0-syz 20200507 > > Unfortunately, I don't have any reproducer for this issue yet. > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+f62749569eab36774dc5@syzkaller.appspotmail.com > > vma ffff888000153210 start 0007700000077000 end 0000000000077000 > next 0007700000000000 prev 0000000007070707 mm 0007700000000000 > prot 77700000077000 anon_vma 0000000000000000 vm_ops ffffffff885cecc0 All these 0 and 7 look very broken. Is it some magic or just garbage? -- Kirill A. Shutemov