r0 = openat$nvram(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
preadv(r0, &(0x7f0000000200)=[{&(0x7f0000000080)=""/106, 0x6a}], 0x1, 0x7fffffff, 0x0)