:::::: :::::: Manual check reason: "low confidence bisect report" :::::: Manual check reason: "low confidence static check warning: lib/string_helpers.c:150:20: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]" ::::::
BCC: [email protected] CC: [email protected] In-Reply-To: <[email protected]> References: <[email protected]> TO: Cezary Rojewski <[email protected]> TO: [email protected] TO: [email protected] CC: [email protected] CC: Cezary Rojewski <[email protected]> CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] CC: Andy Shevchenko <[email protected]> CC: [email protected] CC: [email protected] CC: [email protected] CC: [email protected] Hi Cezary, I love your patch! Perhaps something to improve: [auto build test WARNING on broonie-sound/for-next] [also build test WARNING on linus/master v6.0-rc3] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Cezary-Rojewski/lib-string_helpers-Introduce-tokenize_user_input/20220902-014254 base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next :::::: branch date: 27 hours ago :::::: commit date: 27 hours ago config: arm-randconfig-c002-20220901 (https://download.01.org/0day-ci/archive/20220903/[email protected]/config) 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://github.com/intel-lab-lkp/linux/commit/53e2025c60da991b4e879aaf336a6635c0b87b07 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Cezary-Rojewski/lib-string_helpers-Introduce-tokenize_user_input/20220902-014254 git checkout 53e2025c60da991b4e879aaf336a6635c0b87b07 # 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 <[email protected]> gcc_analyzer warnings: (new ones prefixed by >>) lib/string_helpers.c: In function 'tokenize_user_input': >> lib/string_helpers.c:150:20: warning: use of uninitialized value '<unknown>' >> [CWE-457] [-Wanalyzer-use-of-uninitialized-value] 150 | int *ints, nints; | ^~~~~ 'tokenize_user_input': event 1 | | 150 | int *ints, nints; | | ^~~~~ | | | | | (1) use of uninitialized value '<unknown>' here | vim +150 lib/string_helpers.c 16c7fa05829e8b9 Andy Shevchenko 2013-04-30 133 53e2025c60da991 Cezary Rojewski 2022-09-01 134 /** 53e2025c60da991 Cezary Rojewski 2022-09-01 135 * tokenize_user_input - Split string into a sequence of integers 53e2025c60da991 Cezary Rojewski 2022-09-01 136 * @from: The user space buffer to read from 53e2025c60da991 Cezary Rojewski 2022-09-01 137 * @ppos: The current position in the buffer 53e2025c60da991 Cezary Rojewski 2022-09-01 138 * @count: The maximum number of bytes to read 53e2025c60da991 Cezary Rojewski 2022-09-01 139 * @tkns: Returned pointer to sequence of integers 53e2025c60da991 Cezary Rojewski 2022-09-01 140 * 53e2025c60da991 Cezary Rojewski 2022-09-01 141 * On success @tkns is allocated and initialized with a sequence of 53e2025c60da991 Cezary Rojewski 2022-09-01 142 * integers extracted from the @from plus an additional element that 53e2025c60da991 Cezary Rojewski 2022-09-01 143 * begins the sequence and specifies the integers count. 53e2025c60da991 Cezary Rojewski 2022-09-01 144 * 53e2025c60da991 Cezary Rojewski 2022-09-01 145 * Caller takes responsibility for freeing @tkns when it is no longer 53e2025c60da991 Cezary Rojewski 2022-09-01 146 * needed. 53e2025c60da991 Cezary Rojewski 2022-09-01 147 */ 53e2025c60da991 Cezary Rojewski 2022-09-01 148 int tokenize_user_input(const char __user *from, size_t count, int **tkns) 53e2025c60da991 Cezary Rojewski 2022-09-01 149 { 53e2025c60da991 Cezary Rojewski 2022-09-01 @150 int *ints, nints; 53e2025c60da991 Cezary Rojewski 2022-09-01 151 char *buf; 53e2025c60da991 Cezary Rojewski 2022-09-01 152 int ret = 0; 53e2025c60da991 Cezary Rojewski 2022-09-01 153 53e2025c60da991 Cezary Rojewski 2022-09-01 154 buf = memdup_user_nul(from, count); 53e2025c60da991 Cezary Rojewski 2022-09-01 155 if (IS_ERR(buf)) 53e2025c60da991 Cezary Rojewski 2022-09-01 156 return PTR_ERR(buf); 53e2025c60da991 Cezary Rojewski 2022-09-01 157 53e2025c60da991 Cezary Rojewski 2022-09-01 158 get_options(buf, 0, &nints); 53e2025c60da991 Cezary Rojewski 2022-09-01 159 if (!nints) { 53e2025c60da991 Cezary Rojewski 2022-09-01 160 ret = -ENOENT; 53e2025c60da991 Cezary Rojewski 2022-09-01 161 goto free_buf; 53e2025c60da991 Cezary Rojewski 2022-09-01 162 } 53e2025c60da991 Cezary Rojewski 2022-09-01 163 53e2025c60da991 Cezary Rojewski 2022-09-01 164 ints = kcalloc(nints + 1, sizeof(*ints), GFP_KERNEL); 53e2025c60da991 Cezary Rojewski 2022-09-01 165 if (!ints) { 53e2025c60da991 Cezary Rojewski 2022-09-01 166 ret = -ENOMEM; 53e2025c60da991 Cezary Rojewski 2022-09-01 167 goto free_buf; 53e2025c60da991 Cezary Rojewski 2022-09-01 168 } 53e2025c60da991 Cezary Rojewski 2022-09-01 169 53e2025c60da991 Cezary Rojewski 2022-09-01 170 get_options(buf, nints + 1, ints); 53e2025c60da991 Cezary Rojewski 2022-09-01 171 *tkns = ints; 53e2025c60da991 Cezary Rojewski 2022-09-01 172 53e2025c60da991 Cezary Rojewski 2022-09-01 173 free_buf: 53e2025c60da991 Cezary Rojewski 2022-09-01 174 kfree(buf); 53e2025c60da991 Cezary Rojewski 2022-09-01 175 return ret; 53e2025c60da991 Cezary Rojewski 2022-09-01 176 } 53e2025c60da991 Cezary Rojewski 2022-09-01 177 EXPORT_SYMBOL(tokenize_user_input); 53e2025c60da991 Cezary Rojewski 2022-09-01 178 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
