BUG: memory leak
unreferenced object 0xffff888017444800 (size 256):
  comm "syz-executor.7", pid 5123, jiffies 4295060319 (age 19.279s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 06 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000ac6190ab>] mas_alloc_nodes+0x36e/0x6a0
    [<00000000c7191caa>] mas_node_count+0x101/0x130
    [<000000008db54304>] mas_expected_entries+0x10c/0x1b0
    [<00000000364d7af8>] dup_mmap+0x433/0xf80
    [<000000000190645c>] dup_mm+0x91/0x370
    [<00000000b38097c2>] copy_process+0x6bb9/0x6d80
    [<000000008fcf7822>] kernel_clone+0xe7/0xa60
    [<0000000049e9c6bd>] __do_sys_fork+0x7c/0xb0
    [<00000000417977ae>] do_syscall_64+0x3b/0x90
    [<000000005e3dd6c0>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

BUG: leak checking failed