r0 = openat$pidfd(0xffffffffffffff9c, &(0x7f00000002c0), 0x0, 0x0)
r1 = dup(r0)
pidfd_send_signal(r1, 0x0, &(0x7f00000000c0)={0x0, 0x0, 0xfffffff9}, 0x0)