r0 = syz_io_uring_setup(0x511f, &(0x7f000000b780), &(0x7f0000ffe000/0x2000)=nil, &(0x7f0000ffd000/0x3000)=nil, &(0x7f000000b800), &(0x7f000000b840))
r1 = eventfd(0x0)
io_uring_register$IORING_REGISTER_EVENTFD(r0, 0x4, &(0x7f000000b880)=r1, 0x1)
io_uring_register$IORING_UNREGISTER_EVENTFD(r0, 0x5, 0x0, 0x0)