Hi Richard, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on jack-fs/fsnotify] [also build test WARNING on pcmoore-audit/next linus/master v5.19 next-20220810] [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/Richard-Guy-Briggs/fanotify-Allow-user-space-to-pass-back-additional-audit-info/20220810-012825 base: https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git fsnotify config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220810/202208102231.qSUdYAdb-lkp@xxxxxxxxx/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 5f1c7e2cc5a3c07cbc2412e851a7283c1841f520) 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/a943676abc023c094f05b45f4d61936c567507a2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Richard-Guy-Briggs/fanotify-Allow-user-space-to-pass-back-additional-audit-info/20220810-012825 git checkout a943676abc023c094f05b45f4d61936c567507a2 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/notify/fanotify/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> fs/notify/fanotify/fanotify_user.c:325:35: warning: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Wformat] group, fd, response, info_buf, count); ^~~~~ include/linux/printk.h:594:38: note: expanded from macro 'pr_debug' no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ include/linux/printk.h:131:17: note: expanded from macro 'no_printk' printk(fmt, ##__VA_ARGS__); \ ~~~ ^~~~~~~~~~~ include/linux/printk.h:464:60: note: expanded from macro 'printk' #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ include/linux/printk.h:436:19: note: expanded from macro 'printk_index_wrap' _p_func(_fmt, ##__VA_ARGS__); \ ~~~~ ^~~~~~~~~~~ 1 warning generated. vim +325 fs/notify/fanotify/fanotify_user.c 312 313 static int process_access_response(struct fsnotify_group *group, 314 struct fanotify_response *response_struct, 315 const char __user *buf, 316 size_t count) 317 { 318 struct fanotify_perm_event *event; 319 int fd = response_struct->fd; 320 u32 response = response_struct->response; 321 struct fanotify_response_info_header info_hdr; 322 char *info_buf = NULL; 323 324 pr_debug("%s: group=%p fd=%d response=%u buf=%p size=%lu\n", __func__, > 325 group, fd, response, info_buf, count); 326 /* 327 * make sure the response is valid, if invalid we do nothing and either 328 * userspace can send a valid response or we will clean it up after the 329 * timeout 330 */ 331 if (response & ~FANOTIFY_RESPONSE_VALID_MASK) 332 return -EINVAL; 333 switch (response & FANOTIFY_RESPONSE_ACCESS) { 334 case FAN_ALLOW: 335 case FAN_DENY: 336 break; 337 default: 338 return -EINVAL; 339 } 340 if ((response & FAN_AUDIT) && !FAN_GROUP_FLAG(group, FAN_ENABLE_AUDIT)) 341 return -EINVAL; 342 if (fd < 0) 343 return -EINVAL; 344 if (response & FAN_INFO) { 345 size_t c = count; 346 const char __user *ib = buf; 347 348 if (c <= 0) 349 return -EINVAL; 350 while (c >= sizeof(info_hdr)) { 351 if (copy_from_user(&info_hdr, ib, sizeof(info_hdr))) 352 return -EFAULT; 353 if (info_hdr.pad != 0) 354 return -EINVAL; 355 if (c < info_hdr.len) 356 return -EINVAL; 357 switch (info_hdr.type) { 358 case FAN_RESPONSE_INFO_AUDIT_RULE: 359 break; 360 case FAN_RESPONSE_INFO_NONE: 361 default: 362 return -EINVAL; 363 } 364 c -= info_hdr.len; 365 ib += info_hdr.len; 366 } 367 if (c != 0) 368 return -EINVAL; 369 /* Simplistic check for now */ 370 if (count != sizeof(struct fanotify_response_info_audit_rule)) 371 return -EINVAL; 372 info_buf = kmalloc(sizeof(struct fanotify_response_info_audit_rule), 373 GFP_KERNEL); 374 if (!info_buf) 375 return -ENOMEM; 376 if (copy_from_user(info_buf, buf, count)) 377 return -EFAULT; 378 } 379 spin_lock(&group->notification_lock); 380 list_for_each_entry(event, &group->fanotify_data.access_list, 381 fae.fse.list) { 382 if (event->fd != fd) 383 continue; 384 385 list_del_init(&event->fae.fse.list); 386 /* finish_permission_event() eats info_buf */ 387 finish_permission_event(group, event, response_struct, 388 count, info_buf); 389 wake_up(&group->fanotify_data.access_waitq); 390 return 0; 391 } 392 spin_unlock(&group->notification_lock); 393 394 return -ENOENT; 395 } 396 -- 0-DAY CI Kernel Test Service https://01.org/lkp
