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d="scan'208";a="358787371" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jun 2023 04:00:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10731"; a="955294125" X-IronPort-AV: E=Sophos;i="6.00,217,1681196400"; d="scan'208";a="955294125" Received: from lkp-server01.sh.intel.com (HELO 15ab08e44a81) ([10.239.97.150]) by fmsmga006.fm.intel.com with ESMTP; 05 Jun 2023 04:00:01 -0700 Received: from kbuild by 15ab08e44a81 with local (Exim 4.96) (envelope-from ) id 1q67wO-00048B-3A; Mon, 05 Jun 2023 11:00:00 +0000 Date: Mon, 5 Jun 2023 18:59:29 +0800 From: kernel test robot To: Vlad Buslov Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Greg Kroah-Hartman , Jiri Pirko , Sasha Levin Subject: [stable:linux-5.4.y 3300/8640] net/sched/cls_flower.c:296:12: warning: stack frame size (1040) exceeds limit (1024) in 'fl_classify' Message-ID: <202306051816.mO3hqt7d-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Hi Vlad, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.4.y head: cf0b1e5482eaeb4db15c9e703267483dba88b575 commit: 5f2e54391893c67b709a64b280417ca0318adb73 [3300/8640] net/sched: flower: fix parsing of ethertype following VLAN header config: mips-randconfig-r013-20230605 (https://download.01.org/0day-ci/archive/20230605/202306051816.mO3hqt7d-lkp@intel.com/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 4faf3aaf28226a4e950c103a14f6fc1d1fdabb1b) reproduce (this is a W=1 build): mkdir -p ~/bin wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install mips cross compiling tool for clang build # apt-get install binutils-mipsel-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=5f2e54391893c67b709a64b280417ca0318adb73 git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git git fetch --no-tags stable linux-5.4.y git checkout 5f2e54391893c67b709a64b280417ca0318adb73 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=mips olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash net/sched/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202306051816.mO3hqt7d-lkp@intel.com/ All warnings (new ones prefixed by >>): >> net/sched/cls_flower.c:296:12: warning: stack frame size (1040) exceeds limit (1024) in 'fl_classify' [-Wframe-larger-than] static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, ^ 1 warning generated. vim +/fl_classify +296 net/sched/cls_flower.c e0ace68af2acfe Paul Blakey 2019-07-09 295 77b9900ef53ae0 Jiri Pirko 2015-05-12 @296 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 77b9900ef53ae0 Jiri Pirko 2015-05-12 297 struct tcf_result *res) 77b9900ef53ae0 Jiri Pirko 2015-05-12 298 { 77b9900ef53ae0 Jiri Pirko 2015-05-12 299 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 77b9900ef53ae0 Jiri Pirko 2015-05-12 300 struct fl_flow_key skb_mkey; e0ace68af2acfe Paul Blakey 2019-07-09 301 struct fl_flow_key skb_key; e0ace68af2acfe Paul Blakey 2019-07-09 302 struct fl_flow_mask *mask; e0ace68af2acfe Paul Blakey 2019-07-09 303 struct cls_fl_filter *f; 77b9900ef53ae0 Jiri Pirko 2015-05-12 304 05cd271fd61a0b Paul Blakey 2018-04-30 305 list_for_each_entry_rcu(mask, &head->masks, list) { 50acd32ea7f682 Jason Baron 2020-02-17 306 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 05cd271fd61a0b Paul Blakey 2018-04-30 307 fl_clear_masked_range(&skb_key, mask); bc3103f1ed405d Amir Vadai 2016-09-08 308 8212ed777f40c7 Jiri Pirko 2019-06-19 309 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 05cd271fd61a0b Paul Blakey 2018-04-30 310 /* skb_flow_dissect() does not set n_proto in case an unknown 05cd271fd61a0b Paul Blakey 2018-04-30 311 * protocol, so do it rather here. 77b9900ef53ae0 Jiri Pirko 2015-05-12 312 */ 9b7fd81cf9b6ca Toke Høiland-Jørgensen 2020-07-03 313 skb_key.basic.n_proto = skb_protocol(skb, false); 05cd271fd61a0b Paul Blakey 2018-04-30 314 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); e0ace68af2acfe Paul Blakey 2019-07-09 315 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, e0ace68af2acfe Paul Blakey 2019-07-09 316 fl_ct_info_to_flower_map, e0ace68af2acfe Paul Blakey 2019-07-09 317 ARRAY_SIZE(fl_ct_info_to_flower_map)); 05cd271fd61a0b Paul Blakey 2018-04-30 318 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 77b9900ef53ae0 Jiri Pirko 2015-05-12 319 05cd271fd61a0b Paul Blakey 2018-04-30 320 fl_set_masked_key(&skb_mkey, &skb_key, mask); 77b9900ef53ae0 Jiri Pirko 2015-05-12 321 5c72299fba9df4 Amritha Nambiar 2018-11-12 322 f = fl_lookup(mask, &skb_mkey, &skb_key); e8eb36cd8ca93f Amir Vadai 2016-06-13 323 if (f && !tc_skip_sw(f->flags)) { 77b9900ef53ae0 Jiri Pirko 2015-05-12 324 *res = f->res; 77b9900ef53ae0 Jiri Pirko 2015-05-12 325 return tcf_exts_exec(skb, &f->exts, res); 77b9900ef53ae0 Jiri Pirko 2015-05-12 326 } 05cd271fd61a0b Paul Blakey 2018-04-30 327 } 77b9900ef53ae0 Jiri Pirko 2015-05-12 328 return -1; 77b9900ef53ae0 Jiri Pirko 2015-05-12 329 } 77b9900ef53ae0 Jiri Pirko 2015-05-12 330 :::::: The code at line 296 was first introduced by commit :::::: 77b9900ef53ae047e36a37d13a2aa33bb2d60641 tc: introduce Flower classifier :::::: TO: Jiri Pirko :::::: CC: David S. Miller -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki