Hi Markus, kernel test robot noticed the following build errors:
[auto build test ERROR on b4432656b36e5cc1d50a1f2dc15357543add530e] url: https://github.com/intel-lab-lkp/linux/commits/Markus-Burri/iio-backend-fix-out-of-bound-write/20250508-211644 base: b4432656b36e5cc1d50a1f2dc15357543add530e patch link: https://lore.kernel.org/r/20250508130612.82270-5-markus.burri%40mt.com patch subject: [PATCH v4 4/6] gpio: fix potential out-of-bound write config: x86_64-buildonly-randconfig-003-20250509 (https://download.01.org/0day-ci/archive/20250509/202505091754.285hhbr2-...@intel.com/config) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) rustc: rustc 1.78.0 (9b00956e5 2024-04-29) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250509/202505091754.285hhbr2-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202505091754.285hhbr2-...@intel.com/ All errors (new ones prefixed by >>): >> drivers/gpio/gpio-virtuser.c:404:6: error: use of undeclared identifier >> 'size'; did you mean 'ksize'? 404 | if (size >= sizeof(buf)) | ^~~~ | ksize include/linux/slab.h:491:8: note: 'ksize' declared here 491 | size_t ksize(const void *objp); | ^ 1 error generated. vim +404 drivers/gpio/gpio-virtuser.c 393 394 static ssize_t gpio_virtuser_direction_do_write(struct file *file, 395 const char __user *user_buf, 396 size_t count, loff_t *ppos, 397 bool atomic) 398 { 399 struct gpio_virtuser_line_data *data = file->private_data; 400 struct gpio_desc *desc = data->ad.desc; 401 char buf[32], *trimmed; 402 int ret, dir, val = 0; 403 > 404 if (size >= sizeof(buf)) 405 return -EINVAL; 406 407 ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count); 408 if (ret < 0) 409 return ret; 410 411 buf[ret] = '\0'; 412 413 trimmed = strim(buf); 414 415 if (strcmp(trimmed, "input") == 0) { 416 dir = 1; 417 } else if (strcmp(trimmed, "output-high") == 0) { 418 dir = 0; 419 val = 1; 420 } else if (strcmp(trimmed, "output-low") == 0) { 421 dir = val = 0; 422 } else { 423 return -EINVAL; 424 } 425 426 if (!atomic) 427 ret = gpio_virtuser_set_direction(desc, dir, val); 428 else 429 ret = gpio_virtuser_set_direction_atomic(desc, dir, val); 430 if (ret) 431 return ret; 432 433 return count; 434 } 435 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
