r0 = openat$hwrng(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
preadv(r0, &(0x7f00000005c0)=[{0x0}, {&(0x7f0000000380)=""/51, 0x33}], 0x2, 0x0, 0x0)