r0 = openat$tcp_congestion(0xffffffffffffff9c, &(0x7f0000000580), 0x1, 0x0)
r1 = fcntl$dupfd(r0, 0x0, r0)
write$P9_RGETATTR(r1, &(0x7f0000000000)={0xa0, 0x19, 0x0, {0x0, {}, 0x0, 0xffffffffffffffff}}, 0xa0)
poll(&(0x7f0000000100)=[{r1}], 0x1, 0x0)