From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl0-f70.google.com (mail-pl0-f70.google.com [209.85.160.70]) by kanga.kvack.org (Postfix) with ESMTP id 2C25A6B02AF for ; Mon, 9 Jul 2018 06:26:25 -0400 (EDT) Received: by mail-pl0-f70.google.com with SMTP id ba8-v6so9864230plb.4 for ; Mon, 09 Jul 2018 03:26:25 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id c198-v6sor3259007pga.143.2018.07.09.03.26.23 for (Google Transport Security); Mon, 09 Jul 2018 03:26:23 -0700 (PDT) Date: Mon, 9 Jul 2018 13:15:58 +0300 From: "Kirill A. Shutemov" Subject: Re: kernel BUG at mm/memory.c:LINE! Message-ID: <20180709101558.63vkwppwcgzcv3dg@kshutemo-mobl1> References: <0000000000004a7da505708a9915@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000004a7da505708a9915@google.com> Sender: owner-linux-mm@kvack.org List-ID: To: syzbot Cc: akpm@linux-foundation.org, dan.j.williams@intel.com, jglisse@redhat.com, kirill.shutemov@linux.intel.com, ldufour@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, minchan@kernel.org, ross.zwisler@linux.intel.com, syzkaller-bugs@googlegroups.com, willy@infradead.org, ying.huang@intel.com On Sun, Jul 08, 2018 at 10:51:03PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: b2d44d145d2a Merge tag '4.18-rc3-smb3fixes' of git://git.s.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11d07748400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=2ca6c7a31d407f86 > dashboard link: https://syzkaller.appspot.com/bug?extid=3f84280d52be9b7083cc > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+3f84280d52be9b7083cc@syzkaller.appspotmail.com > > next ffff8801ce5e7040 prev ffff8801d20eca50 mm ffff88019c1e13c0 > prot 27 anon_vma ffff88019680cdd8 vm_ops 0000000000000000 > pgoff 0 file ffff8801b2ec2d00 private_data 0000000000000000 > flags: 0xff(read|write|exec|shared|mayread|maywrite|mayexec|mayshare) > ------------[ cut here ]------------ > kernel BUG at mm/memory.c:1422! Looks like vma_is_anonymous() false-positive. Any clues what file is it? I would guess some kind of socket, but it's not clear from log which exactly. -- Kirill A. Shutemov