r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='net/rt_cache\x00')
preadv(r0, &(0x7f0000000100)=[{&(0x7f0000000b40)=""/4096, 0x1000}], 0x1, 0xfffff800, 0x0)