r0 = socket$inet6_udp(0xa, 0x2, 0x0)
r1 = creat(&(0x7f0000000040)='./file0\x00', 0x0)
write(r1, &(0x7f0000000900)='^', 0x1)
r2 = openat$dir(0xffffffffffffff9c, &(0x7f0000000000)='./file0\x00', 0x0, 0x0)
io_submit(0x0, 0x0, 0x0)
connect$unix(0xffffffffffffffff, 0x0, 0x0)
openat$ptmx(0xffffffffffffff9c, 0x0, 0x0, 0x0)
fcntl$setstatus(r1, 0x4, 0x44000)
setsockopt$SO_TIMESTAMPING(r0, 0x1, 0x49, &(0x7f0000000080)=0x68bbd9b0592eaacf, 0x4)
r3 = fcntl$dupfd(r1, 0x0, r2)
write$tcp_congestion(r3, &(0x7f00000001c0)='cubic\x00', 0x6)