prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000040))
r0 = socket$inet(0x2, 0x3, 0x23)
sendto$inet(r0, 0x0, 0x0, 0x0, &(0x7f0000000180)={0x2, 0x0, @loopback}, 0x10)
recvmsg(r0, &(0x7f0000000300)={0x0, 0x0, 0x0}, 0x0)