r0 = openat$nvram(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
preadv(r0, &(0x7f00000000c0)=[{0x0}, {&(0x7f0000000080)=""/16, 0x10}], 0x2, 0x0, 0x0)