From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S937629AbdLSJBW (ORCPT ); Tue, 19 Dec 2017 04:01:22 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:55504 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932994AbdLSJBT (ORCPT ); Tue, 19 Dec 2017 04:01:19 -0500 Date: Tue, 19 Dec 2017 10:01:21 +0100 From: Greg KH To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: WARNING in sysfs_warn_dup Message-ID: <20171219090121.GA10221@kroah.com> References: <001a11c14bc837f9760560a03d51@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <001a11c14bc837f9760560a03d51@google.com> User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 18, 2017 at 08:57:01AM -0800, syzbot wrote: > Hello, > > syzkaller hit the following crash on > 6084b576dca2e898f5c101baef151f7bfdbb606d > git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > > Unfortunately, I don't have any reproducer for this bug yet. > > > netlink: 9 bytes leftover after parsing attributes in process > `syz-executor3'. > sg_write: data in/out 822404280/197 bytes for SCSI command 0x12-- guessing > data in; > program syz-executor0 not setting count and/or reply_len properly > sg_write: data in/out 262364/161 bytes for SCSI command 0xff-- guessing data > in; > program syz-executor0 not setting count and/or reply_len properly > WARNING: CPU: 1 PID: 22282 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x60/0x80 > fs/sysfs/dir.c:30 > Kernel panic - not syncing: panic_on_warn set ... Looks like a networking issue, it tried to create two sysfs directories with the same name, which isn't a sysfs bug :) thanks, greg k-h