r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='net/if_inet6\x00')
preadv(r0, &(0x7f0000000040)=[{&(0x7f0000001400)=""/4080, 0xff0}], 0x1, 0x800004, 0x0)