tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.18/io_uring head: 971d72eb476604fc91a8e82f0421e6f599f9c300 commit: b77e315a96445e5f19a83546c73d2abbcedfa5db [2/5] io_uring: avoid ring quiesce while registering/unregistering eventfd compiler: riscv64-linux-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <yujie.liu(a)intel.com&gt; cppcheck possible warnings: (new ones prefixed by >>, may not be real problems) return ret; ^ vim +9406 fs/io_uring.c 634d00df5e1cfc Pavel Begunkov 2021-04-25 9379 9b402849e80c85 Jens Axboe 2019-04-11 9380 static int io_eventfd_register(struct io_ring_ctx *ctx, void __user *arg) 9b402849e80c85 Jens Axboe 2019-04-11 9381 { b77e315a96445e Usama Arif 2022-02-04 9382 struct io_ev_fd *ev_fd; 9b402849e80c85 Jens Axboe 2019-04-11 9383 __s32 __user *fds = arg; b77e315a96445e Usama Arif 2022-02-04 9384 int fd, ret; 9b402849e80c85 Jens Axboe 2019-04-11 9385 b77e315a96445e Usama Arif 2022-02-04 9386 ev_fd = rcu_dereference_protected(ctx->io_ev_fd, b77e315a96445e Usama Arif 2022-02-04 9387 lockdep_is_held(&ctx->uring_lock)); b77e315a96445e Usama Arif 2022-02-04 9388 if (ev_fd) 9b402849e80c85 Jens Axboe 2019-04-11 9389 return -EBUSY; 9b402849e80c85 Jens Axboe 2019-04-11 9390 9b402849e80c85 Jens Axboe 2019-04-11 9391 if (copy_from_user(&fd, fds, sizeof(*fds))) 9b402849e80c85 Jens Axboe 2019-04-11 9392 return -EFAULT; 9b402849e80c85 Jens Axboe 2019-04-11 9393 b77e315a96445e Usama Arif 2022-02-04 9394 ev_fd = kmalloc(sizeof(*ev_fd), GFP_KERNEL); b77e315a96445e Usama Arif 2022-02-04 9395 if (!ev_fd) b77e315a96445e Usama Arif 2022-02-04 9396 return -ENOMEM; fe7e3257502991 Pavel Begunkov 2021-06-24 9397 b77e315a96445e Usama Arif 2022-02-04 9398 ev_fd->cq_ev_fd = eventfd_ctx_fdget(fd); b77e315a96445e Usama Arif 2022-02-04 9399 if (IS_ERR(ev_fd->cq_ev_fd)) { b77e315a96445e Usama Arif 2022-02-04 9400 ret = PTR_ERR(ev_fd->cq_ev_fd); b77e315a96445e Usama Arif 2022-02-04 9401 kfree(ev_fd); 9b402849e80c85 Jens Axboe 2019-04-11 9402 return ret; 9b402849e80c85 Jens Axboe 2019-04-11 9403 } 9b402849e80c85 Jens Axboe 2019-04-11 9404 b77e315a96445e Usama Arif 2022-02-04 9405 rcu_assign_pointer(ctx->io_ev_fd, ev_fd); b77e315a96445e Usama Arif 2022-02-04 @9406 return ret; b77e315a96445e Usama Arif 2022-02-04 9407 } b77e315a96445e Usama Arif 2022-02-04 9408 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org