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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13F86C433F5 for ; Sat, 4 Dec 2021 19:24:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348671AbhLDT12 (ORCPT ); Sat, 4 Dec 2021 14:27:28 -0500 Received: from mga04.intel.com ([192.55.52.120]:18469 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347719AbhLDT11 (ORCPT ); Sat, 4 Dec 2021 14:27:27 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10188"; a="235876561" X-IronPort-AV: E=Sophos;i="5.87,288,1631602800"; d="scan'208";a="235876561" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Dec 2021 11:24:01 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,288,1631602800"; d="scan'208";a="461339091" Received: from lkp-server02.sh.intel.com (HELO 9e1e9f9b3bcb) ([10.239.97.151]) by orsmga006.jf.intel.com with ESMTP; 04 Dec 2021 11:23:59 -0800 Received: from kbuild by 9e1e9f9b3bcb with local (Exim 4.92) (envelope-from ) id 1mtadb-000JLm-2c; Sat, 04 Dec 2021 19:23:59 +0000 Date: Sun, 5 Dec 2021 03:23:45 +0800 From: kernel test robot To: M Chetan Kumar Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: drivers/net/wwan/iosm/iosm_ipc_mux_codec.c:833:21: sparse: sparse: Using plain integer as NULL pointer Message-ID: <202112050318.uBUvlyTo-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: bbef3c7a63d2a4cb0f3f839db9e767f168c5e348 commit: f7af616c632ee2ac3af0876fe33bf9e0232e665a net: iosm: infrastructure date: 6 months ago config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20211205/202112050318.uBUvlyTo-lkp@intel.com/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f7af616c632ee2ac3af0876fe33bf9e0232e665a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout f7af616c632ee2ac3af0876fe33bf9e0232e665a # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/net/wwan/iosm/ drivers/staging/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) >> drivers/net/wwan/iosm/iosm_ipc_mux_codec.c:833:21: sparse: sparse: Using plain integer as NULL pointer vim +833 drivers/net/wwan/iosm/iosm_ipc_mux_codec.c 9413491e20e1ab M Chetan Kumar 2021-06-13 814 9413491e20e1ab M Chetan Kumar 2021-06-13 815 void ipc_mux_ul_encoded_process(struct iosm_mux *ipc_mux, struct sk_buff *skb) 9413491e20e1ab M Chetan Kumar 2021-06-13 816 { 9413491e20e1ab M Chetan Kumar 2021-06-13 817 struct mux_adgh *adgh; 9413491e20e1ab M Chetan Kumar 2021-06-13 818 u16 adgh_len; 9413491e20e1ab M Chetan Kumar 2021-06-13 819 9413491e20e1ab M Chetan Kumar 2021-06-13 820 adgh = (struct mux_adgh *)skb->data; 9413491e20e1ab M Chetan Kumar 2021-06-13 821 adgh_len = le16_to_cpu(adgh->length); 9413491e20e1ab M Chetan Kumar 2021-06-13 822 9413491e20e1ab M Chetan Kumar 2021-06-13 823 if (adgh->signature == cpu_to_le32(MUX_SIG_ADGH) && 9413491e20e1ab M Chetan Kumar 2021-06-13 824 ipc_mux->ul_flow == MUX_UL) 9413491e20e1ab M Chetan Kumar 2021-06-13 825 ipc_mux->ul_data_pend_bytes = ipc_mux->ul_data_pend_bytes - 9413491e20e1ab M Chetan Kumar 2021-06-13 826 adgh_len; 9413491e20e1ab M Chetan Kumar 2021-06-13 827 9413491e20e1ab M Chetan Kumar 2021-06-13 828 if (ipc_mux->ul_flow == MUX_UL) 9413491e20e1ab M Chetan Kumar 2021-06-13 829 dev_dbg(ipc_mux->dev, "ul_data_pend_bytes: %lld", 9413491e20e1ab M Chetan Kumar 2021-06-13 830 ipc_mux->ul_data_pend_bytes); 9413491e20e1ab M Chetan Kumar 2021-06-13 831 9413491e20e1ab M Chetan Kumar 2021-06-13 832 /* Reset the skb settings. */ 9413491e20e1ab M Chetan Kumar 2021-06-13 @833 skb->tail = 0; 9413491e20e1ab M Chetan Kumar 2021-06-13 834 skb->len = 0; 9413491e20e1ab M Chetan Kumar 2021-06-13 835 9413491e20e1ab M Chetan Kumar 2021-06-13 836 /* Add the consumed ADB to the free list. */ 9413491e20e1ab M Chetan Kumar 2021-06-13 837 skb_queue_tail((&ipc_mux->ul_adb.free_list), skb); 9413491e20e1ab M Chetan Kumar 2021-06-13 838 } 9413491e20e1ab M Chetan Kumar 2021-06-13 839 :::::: The code at line 833 was first introduced by commit :::::: 9413491e20e1aba6e471d90c19cc43e523216a4d net: iosm: encode or decode datagram :::::: TO: M Chetan Kumar :::::: CC: David S. Miller --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org