r0 = openat$nvram(0xffffffffffffff9c, &(0x7f0000000180), 0x0, 0x0)
preadv(r0, &(0x7f00000002c0)=[{&(0x7f00000001c0)=""/242, 0xf2}], 0x1, 0xaa9, 0x0)