tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 5469f0c06732a077c70a759a81f2a1f00b277694 commit: 5c8df7795d6f44449192cf311174aec77b60c49f [7511/7959] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux.git config: s390-randconfig-r003-20220428 (https://download.01.org/0day-ci/archive/20220429/202204291904.NCK0h7cY-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 11.3.0 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/next/linux-next.git/commit/?id=5c8df7795d6f44449192cf311174aec77b60c49f git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 5c8df7795d6f44449192cf311174aec77b60c49f # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from kernel/printk/printk.c:58: kernel/printk/printk.c: In function '__console_emit_next_record.constprop': >> kernel/printk/printk_ringbuffer.h:337:21: warning: array subscript 0 is outside array bounds of 'char[0]' [-Warray-bounds] 337 | r->text_buf = text_buf; | ~~~~~~~~~~~~^~~~~~~~~~ kernel/printk/printk.c:2980:21: note: while referencing 'text' 2980 | static char text[CONSOLE_LOG_MAX]; | ^~~~ vim +337 kernel/printk/printk_ringbuffer.h b6cf8b3f3312e2f John Ogness 2020-07-09 319 b6cf8b3f3312e2f John Ogness 2020-07-09 320 /** b6cf8b3f3312e2f John Ogness 2020-07-09 321 * prb_rec_init_rd() - Initialize a buffer for reading records. b6cf8b3f3312e2f John Ogness 2020-07-09 322 * b6cf8b3f3312e2f John Ogness 2020-07-09 323 * @r: The record to initialize. b6cf8b3f3312e2f John Ogness 2020-07-09 324 * @info: A buffer to store record meta-data. b6cf8b3f3312e2f John Ogness 2020-07-09 325 * @text_buf: A buffer to store text data. b6cf8b3f3312e2f John Ogness 2020-07-09 326 * @text_buf_size: The size of @text_buf. b6cf8b3f3312e2f John Ogness 2020-07-09 327 * b6cf8b3f3312e2f John Ogness 2020-07-09 328 * Initialize all the fields that a reader is interested in. All arguments b6cf8b3f3312e2f John Ogness 2020-07-09 329 * (except @r) are optional. Only record data for arguments that are b6cf8b3f3312e2f John Ogness 2020-07-09 330 * non-NULL or non-zero will be read. b6cf8b3f3312e2f John Ogness 2020-07-09 331 */ b6cf8b3f3312e2f John Ogness 2020-07-09 332 static inline void prb_rec_init_rd(struct printk_record *r, b6cf8b3f3312e2f John Ogness 2020-07-09 333 struct printk_info *info, f35efc78add6439 John Ogness 2020-09-19 334 char *text_buf, unsigned int text_buf_size) b6cf8b3f3312e2f John Ogness 2020-07-09 335 { b6cf8b3f3312e2f John Ogness 2020-07-09 336 r->info = info; b6cf8b3f3312e2f John Ogness 2020-07-09 @337 r->text_buf = text_buf; b6cf8b3f3312e2f John Ogness 2020-07-09 338 r->text_buf_size = text_buf_size; b6cf8b3f3312e2f John Ogness 2020-07-09 339 } b6cf8b3f3312e2f John Ogness 2020-07-09 340 :::::: The code at line 337 was first introduced by commit :::::: b6cf8b3f3312e2ffe38f23c7c692eb9389277a9a printk: add lockless ringbuffer :::::: TO: John Ogness <john.ogness@xxxxxxxxxxxxx> :::::: CC: Petr Mladek <pmladek@xxxxxxxx> -- 0-DAY CI Kernel Test Service https://01.org/lkp
