r0 = openat$tcp_congestion(0xffffffffffffff9c, &(0x7f00000001c0), 0x1, 0x0)
pwritev2(r0, &(0x7f0000000b80)=[{&(0x7f0000000200)="01", 0x1}], 0x1, 0x0, 0x0, 0xb)