From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751829AbeBETlN (ORCPT ); Mon, 5 Feb 2018 14:41:13 -0500 Received: from mail-wm0-f67.google.com ([74.125.82.67]:51415 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751015AbeBETlF (ORCPT ); Mon, 5 Feb 2018 14:41:05 -0500 X-Google-Smtp-Source: AH8x224K+pHUli5HCrDvlWzt75FXRCEDMYWH3RgGvY+tZCyfFIywZ92bJEH+GDdqrWWYs9XN2a7/Nw== Date: Mon, 5 Feb 2018 22:41:01 +0300 From: Alexey Dobriyan To: syzbot , dvyukov@google.com Cc: akpm@linux-foundation.org, dave@stgolabs.net, dhowells@redhat.com, geliangtang@gmail.com, hkallweit1@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tiwai@suse.de, viro@zeniv.linux.org.uk Subject: Re: WARNING in proc_register Message-ID: <20180205194101.GB7593@avx2> References: <94eb2c0555129c9b0e05647acdba@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <94eb2c0555129c9b0e05647acdba@google.com> User-Agent: Mutt/1.7.2 (2016-11-26) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 05, 2018 at 09:58:01AM -0800, syzbot wrote: > proc_dir_entry 'ipt_CLUSTERIP/172.20.0.170' already registered > WARNING: CPU: 1 PID: 4074 at fs/proc/generic.c:330 > proc_create_data+0xf8/0x180 fs/proc/generic.c:494 > clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:250 [inline] Dima, this warning is never about /proc but always about some other code registering duplicate /proc entry. I don't know how easily scriptable is mail sender but you want to look at the second line in the backtrace.