r0 = openat$nvram(0xffffffffffffff9c, &(0x7f0000000080), 0x129001, 0x0)
pwritev2(r0, &(0x7f0000000280)=[{&(0x7f0000000100)="fb", 0x1}], 0x1, 0xca1, 0x0, 0x0)