r0 = openat$nvram(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
pwritev2(r0, &(0x7f0000000680)=[{&(0x7f0000000280)="d0", 0x1}], 0x1, 0x0, 0x0, 0x0)