From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84E4DC388F7 for ; Sat, 31 Oct 2020 05:54:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EA502087E for ; Sat, 31 Oct 2020 05:54:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726251AbgJaFt7 (ORCPT ); Sat, 31 Oct 2020 01:49:59 -0400 Received: from mga03.intel.com ([134.134.136.65]:41378 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725890AbgJaFt7 (ORCPT ); Sat, 31 Oct 2020 01:49:59 -0400 IronPort-SDR: 2mGfNuMcxFLdPxY6nihml74+PgqmJ6DYxU4nZJb4359dQs92j1Nc6T0CrD4kOn7Cg4wQMC0mtV t8hwbqo8O4zA== X-IronPort-AV: E=McAfee;i="6000,8403,9790"; a="168798663" X-IronPort-AV: E=Sophos;i="5.77,436,1596524400"; d="scan'208";a="168798663" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2020 22:49:58 -0700 IronPort-SDR: 4GDfj3e2hcTAKhtdvOdeSCt7aV3ak66e2AsAEL+Z5K53BSgM3eVIZR1a+dH8EbSLcCzqfWhkUz PotAQehCcUdQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,436,1596524400"; d="scan'208";a="526109912" Received: from lkp-server02.sh.intel.com (HELO fcc9f8859912) ([10.239.97.151]) by fmsmga006.fm.intel.com with ESMTP; 30 Oct 2020 22:49:57 -0700 Received: from kbuild by fcc9f8859912 with local (Exim 4.92) (envelope-from ) id 1kYjm0-0000RW-VJ; Sat, 31 Oct 2020 05:49:56 +0000 Date: Sat, 31 Oct 2020 13:49:17 +0800 From: kernel test robot To: Alan Maguire Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Alexei Starovoitov Subject: kernel/trace/bpf_trace.c:1181:23: warning: Uninitialized variable: t Message-ID: <202010311312.RRUikhQ7-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5fc6b075e165f641fbc366b58b578055762d5f8c commit: c4d0bfb45068d853a478b9067a95969b1886a30f bpf: Add bpf_snprintf_btf helper date: 5 weeks ago compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot "cppcheck warnings: (new ones prefixed by >>)" >> kernel/trace/bpf_trace.c:1181:23: warning: Uninitialized variable: t [uninitvar] if (*btf_id <= 0 || !t) ^ vim +1181 kernel/trace/bpf_trace.c 1153 1154 #define BTF_F_ALL (BTF_F_COMPACT | BTF_F_NONAME | \ 1155 BTF_F_PTR_RAW | BTF_F_ZERO) 1156 1157 static int bpf_btf_printf_prepare(struct btf_ptr *ptr, u32 btf_ptr_size, 1158 u64 flags, const struct btf **btf, 1159 s32 *btf_id) 1160 { 1161 const struct btf_type *t; 1162 1163 if (unlikely(flags & ~(BTF_F_ALL))) 1164 return -EINVAL; 1165 1166 if (btf_ptr_size != sizeof(struct btf_ptr)) 1167 return -EINVAL; 1168 1169 *btf = bpf_get_btf_vmlinux(); 1170 1171 if (IS_ERR_OR_NULL(*btf)) 1172 return PTR_ERR(*btf); 1173 1174 if (ptr->type_id > 0) 1175 *btf_id = ptr->type_id; 1176 else 1177 return -EINVAL; 1178 1179 if (*btf_id > 0) 1180 t = btf_type_by_id(*btf, *btf_id); > 1181 if (*btf_id <= 0 || !t) 1182 return -ENOENT; 1183 1184 return 0; 1185 } 1186 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org