tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: a32cd981a6da2373c093d471ee4405a915e217d5 commit: aa3b2b4c669205200615dd8a2cc4af4f81fd0335 [4567/12845] user_events: Add print_fmt generation support for basic types compiler: arc-elf-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> cppcheck warnings: (new ones prefixed by >>) >> kernel/trace/trace_events_user.c:424:22: warning: Pointer addition with NULL pointer. [nullPointerArithmetic] pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ kernel/trace/trace_events_user.c:456:39: note: Calling function 'user_event_set_print_fmt', 2nd argument 'NULL' value is 0 len = user_event_set_print_fmt(user, NULL, 0); ^ kernel/trace/trace_events_user.c:424:22: note: Null pointer addition pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ kernel/trace/trace_events_user.c:436:22: warning: Pointer addition with NULL pointer. [nullPointerArithmetic] pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ kernel/trace/trace_events_user.c:456:39: note: Calling function 'user_event_set_print_fmt', 2nd argument 'NULL' value is 0 len = user_event_set_print_fmt(user, NULL, 0); ^ kernel/trace/trace_events_user.c:436:22: note: Null pointer addition pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ vim +424 kernel/trace/trace_events_user.c 415 416 #define LEN_OR_ZERO (len ? len - pos : 0) 417 static int user_event_set_print_fmt(struct user_event *user, char *buf, int len) 418 { 419 struct ftrace_event_field *field, *next; 420 struct list_head *head = &user->fields; 421 int pos = 0, depth = 0; 422 const char *str_func; 423 > 424 pos += snprintf(buf + pos, LEN_OR_ZERO, "\""); 425 426 list_for_each_entry_safe_reverse(field, next, head, link) { 427 if (depth != 0) 428 pos += snprintf(buf + pos, LEN_OR_ZERO, " "); 429 430 pos += snprintf(buf + pos, LEN_OR_ZERO, "%s=%s", 431 field->name, user_field_format(field->type)); 432 433 depth++; 434 } 435 436 pos += snprintf(buf + pos, LEN_OR_ZERO, "\""); 437 438 list_for_each_entry_safe_reverse(field, next, head, link) { 439 if (user_field_is_dyn_string(field->type, &str_func)) 440 pos += snprintf(buf + pos, LEN_OR_ZERO, 441 ", %s(%s)", str_func, field->name); 442 else 443 pos += snprintf(buf + pos, LEN_OR_ZERO, 444 ", REC->%s", field->name); 445 } 446 447 return pos + 1; 448 } 449 #undef LEN_OR_ZERO 450 --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
