pkey_mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1, 0xffffffffffffffff)
r0 = socket$inet_udp(0x2, 0x2, 0x0)
getsockopt$inet_mtu(r0, 0x0, 0xa, 0x0, &(0x7f0000000040))