r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='net/fib_trie\x00')
preadv(r0, &(0x7f0000000580)=[{&(0x7f0000001380)=""/213, 0xd5}], 0x1, 0x0, 0x0)