BUG: memory leak
unreferenced object 0xffff888042bf1200 (size 256):
  comm "syz-executor.0", pid 6268, jiffies 4295540952 (age 20.988s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 05 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000004f1255b7>] mas_alloc_nodes+0x36e/0x6a0
    [<000000001dda489b>] mas_node_count_gfp+0x106/0x140
    [<00000000432750a2>] mas_expected_entries+0x111/0x1c0
    [<00000000a4468fc6>] dup_mmap+0x41f/0xf40
    [<00000000c81e1e30>] dup_mm+0x91/0x380
    [<0000000043bbbd48>] copy_process+0x5e27/0x6dd0
    [<000000004922d262>] kernel_clone+0xe7/0xa60
    [<00000000a64a8b2c>] __do_sys_clone3+0x1d5/0x2e0
    [<000000007c62bbfa>] do_syscall_64+0x3b/0x90
    [<00000000bac25916>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: leak checking failed