CC: [email protected] BCC: [email protected] CC: [email protected] TO: "Eric W. Biederman" <[email protected]> CC: Kees Cook <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ec7f49619d8ee13e108740c82f942cd401b989e9 commit: 0258b5fd7c7124b87e185a1a9322d2c66b1876b7 coredump: Limit coredumps to a single thread group date: 7 months ago :::::: branch date: 4 hours ago :::::: commit date: 7 months ago compiler: s390-linux-gcc (GCC) 11.3.0 reproduce (cppcheck warning): # apt-get install cppcheck git checkout 0258b5fd7c7124b87e185a1a9322d2c66b1876b7 cppcheck --quiet --enable=style,performance,portability --template=gcc FILE If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> cppcheck possible warnings: (new ones prefixed by >>, may not real problems) >> fs/coredump.c:399:15: warning: Redundant initialization for 'core_waiters'. >> The initialized value is overwritten before it is read. >> [redundantInitialization] core_waiters = zap_threads(tsk, core_state, exit_code); ^ fs/coredump.c:393:19: note: core_waiters is initialized int core_waiters = -EBUSY; ^ fs/coredump.c:399:15: note: core_waiters is overwritten core_waiters = zap_threads(tsk, core_state, exit_code); ^ vim +/core_waiters +399 fs/coredump.c 10c28d937e2cca Alex Kelly 2012-09-26 389 10c28d937e2cca Alex Kelly 2012-09-26 390 static int coredump_wait(int exit_code, struct core_state *core_state) 10c28d937e2cca Alex Kelly 2012-09-26 391 { 10c28d937e2cca Alex Kelly 2012-09-26 392 struct task_struct *tsk = current; 10c28d937e2cca Alex Kelly 2012-09-26 393 int core_waiters = -EBUSY; 10c28d937e2cca Alex Kelly 2012-09-26 394 10c28d937e2cca Alex Kelly 2012-09-26 395 init_completion(&core_state->startup); 10c28d937e2cca Alex Kelly 2012-09-26 396 core_state->dumper.task = tsk; 10c28d937e2cca Alex Kelly 2012-09-26 397 core_state->dumper.next = NULL; 10c28d937e2cca Alex Kelly 2012-09-26 398 0258b5fd7c7124 Eric W. Biederman 2021-09-22 @399 core_waiters = zap_threads(tsk, core_state, exit_code); 10c28d937e2cca Alex Kelly 2012-09-26 400 if (core_waiters > 0) { 10c28d937e2cca Alex Kelly 2012-09-26 401 struct core_thread *ptr; 10c28d937e2cca Alex Kelly 2012-09-26 402 70d78fe7c8b640 Andrey Ryabinin 2016-11-10 403 freezer_do_not_count(); 10c28d937e2cca Alex Kelly 2012-09-26 404 wait_for_completion(&core_state->startup); 70d78fe7c8b640 Andrey Ryabinin 2016-11-10 405 freezer_count(); 10c28d937e2cca Alex Kelly 2012-09-26 406 /* 10c28d937e2cca Alex Kelly 2012-09-26 407 * Wait for all the threads to become inactive, so that 10c28d937e2cca Alex Kelly 2012-09-26 408 * all the thread context (extended register state, like 10c28d937e2cca Alex Kelly 2012-09-26 409 * fpu etc) gets copied to the memory. 10c28d937e2cca Alex Kelly 2012-09-26 410 */ 10c28d937e2cca Alex Kelly 2012-09-26 411 ptr = core_state->dumper.next; 10c28d937e2cca Alex Kelly 2012-09-26 412 while (ptr != NULL) { 10c28d937e2cca Alex Kelly 2012-09-26 413 wait_task_inactive(ptr->task, 0); 10c28d937e2cca Alex Kelly 2012-09-26 414 ptr = ptr->next; 10c28d937e2cca Alex Kelly 2012-09-26 415 } 10c28d937e2cca Alex Kelly 2012-09-26 416 } 10c28d937e2cca Alex Kelly 2012-09-26 417 10c28d937e2cca Alex Kelly 2012-09-26 418 return core_waiters; 10c28d937e2cca Alex Kelly 2012-09-26 419 } 10c28d937e2cca Alex Kelly 2012-09-26 420 -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
