From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolay Aleksandrov Subject: Re: [net-next:master 630/633] net/bridge/br_netlink.c:1110:1: warning: the frame size of 2160 bytes is larger than 2048 bytes Date: Mon, 5 Oct 2015 11:33:42 +0200 Message-ID: <561243F6.1060009@cumulusnetworks.com> References: <201510051053.L0S9UKIW%fengguang.wu@intel.com> <20151005.024717.1982719584385972843.davem@davemloft.net> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: kbuild-all@01.org, netdev@vger.kernel.org To: David Miller , fengguang.wu@intel.com Return-path: Received: from mail-wi0-f169.google.com ([209.85.212.169]:35931 "EHLO mail-wi0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752243AbbJEJdp (ORCPT ); Mon, 5 Oct 2015 05:33:45 -0400 Received: by wicgb1 with SMTP id gb1so110469667wic.1 for ; Mon, 05 Oct 2015 02:33:44 -0700 (PDT) In-Reply-To: <20151005.024717.1982719584385972843.davem@davemloft.net> Sender: netdev-owner@vger.kernel.org List-ID: On 10/05/2015 11:47 AM, David Miller wrote: > From: kbuild test robot > Date: Mon, 5 Oct 2015 10:42:54 +0800 > >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master >> head: 3e087caa23ef36370bfb925d3bbca78e8302d3ce >> commit: 7e4df51eb35deedd3ba8d4db92a6c36fb7eff90a [630/633] bridge: netlink: add support for igmp's intervals >> config: x86_64-randconfig-s0-10051005 (attached as .config) >> reproduce: >> git checkout 7e4df51eb35deedd3ba8d4db92a6c36fb7eff90a >> # save the attached .config to linux build tree >> make ARCH=x86_64 >> >> All warnings (new ones prefixed by >>): >> >> net/bridge/br_netlink.c: In function 'br_fill_info': >>>> net/bridge/br_netlink.c:1110:1: warning: the frame size of 2160 bytes is larger than 2048 bytes [-Wframe-larger-than=] >> } > > Nikolay, please look into this. > I am, this looks like to be caused by enabling KASAN (kernel address sanitizer), there's a lot of additional code generated and the frame grows bigger. The same thing is being discussed here: http://www.spinics.net/lists/linux-media/msg93925.html The real size is much smaller without kasan.