[kbuild] sound/soc/sof/pcm.c:128:50: warning: use of uninitialized value '<unknown>' [CWE-457]

:::::: :::::: Manual check reason: "low confidence bisect report" :::::: Manual check reason: "low confidence static check warning: sound/soc/sof/pcm.c:128:50: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]" :::::: BCC: lkp(a)intel.com CC: kbuild-all(a)lists.01.org CC: linux-kernel(a)vger.kernel.org TO: Ranjani Sridharan <ranjani.sridharan(a)linux.intel.com&gt; CC: Mark Brown <broonie(a)kernel.org&gt; CC: Guennadi Liakhovetski <guennadi.liakhovetski(a)linux.intel.com&gt; CC: "Pierre-Louis Bossart" <pierre-louis.bossart(a)linux.intel.com&gt; CC: Kai Vehmanen <kai.vehmanen(a)linux.intel.com&gt; CC: Daniel Baluta <daniel.baluta(a)nxp.com&gt; CC: Peter Ujfalusi <peter.ujfalusi(a)linux.intel.com&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: a335366bad1364a07f49df9da1fdfa6d411a5f39 commit: 5fcdbb2d45df6afb654674379546996b0027aa3e ASoC: SOF: Add support for dynamic pipelines date: 12 months ago :::::: branch date: 28 hours ago :::::: commit date: 12 months ago config: arm-randconfig-c002-20220917 compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 5fcdbb2d45df6afb654674379546996b0027aa3e # save the config file COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross ARCH=arm KBUILD_USERCFLAGS='-fanalyzer -Wno-error' If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp(a)intel.com&gt; gcc_analyzer warnings: (new ones prefixed by >>) sound/soc/sof/pcm.c: In function 'sof_pcm_setup_connected_widgets': 128 | struct snd_soc_dapm_widget_list *list; | ^~~~ 'sof_pcm_setup_connected_widgets': event 1 | |include/sound/soc.h:1091:36: | 1091 | ((i) < rtd->num_cpus) && ((dai) = asoc_rtd_to_cpu(rtd, i)); \ | | ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | | | (1) following 'true' branch... sound/soc/sof/pcm.c:127:9: note: in expansion of macro 'for_each_rtd_cpu_dais' | 127 | for_each_rtd_cpu_dais(rtd, j, dai) { | | ^~~~~~~~~~~~~~~~~~~~~ | 'sof_pcm_setup_connected_widgets': events 2-3 | | 128 | struct snd_soc_dapm_widget_list *list; | | ^~~~ | | | | | (2) ...to here | | (3) use of uninitialized value '<unknown>' here | vim +128 sound/soc/sof/pcm.c cfe8191b1bbf2b Kai Vehmanen 2020-01-10 118 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 119 static int sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 120 struct snd_soc_pcm_runtime *rtd, 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 121 struct snd_sof_pcm *spcm, int dir) 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 122 { 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 123 struct snd_soc_dai *dai; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 124 int ret, j; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 125 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 126 /* query DAPM for list of connected widgets and set them up */ 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 127 for_each_rtd_cpu_dais(rtd, j, dai) { 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 @128 struct snd_soc_dapm_widget_list *list; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 129 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 130 ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list, 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 131 dpcm_end_walk_at_be); 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 132 if (ret < 0) { 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 133 dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name, 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 134 dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture"); 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 135 return ret; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 136 } 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 137 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 138 spcm->stream[dir].list = list; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 139 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 140 ret = sof_widget_list_setup(sdev, spcm, dir); 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 141 if (ret < 0) { 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 142 dev_err(sdev->dev, "error: failed widget list set up for pcm %d dir %d\n", 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 143 spcm->pcm.pcm_id, dir); 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 144 spcm->stream[dir].list = NULL; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 145 snd_soc_dapm_dai_free_widgets(&list); 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 146 return ret; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 147 } 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 148 } 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 149 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 150 return 0; 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 151 } 5fcdbb2d45df6a Ranjani Sridharan 2021-09-27 152 -- 0-DAY CI Kernel Test Service https://01.org/lkp