BUG: memory leak
unreferenced object 0xffff88801b1ae400 (size 256):
  comm "syz-executor.4", pid 36768, jiffies 4298245639 (age 22.697s)
  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:
    [<000000005a63b335>] mas_alloc_nodes+0x36e/0x6a0
    [<00000000ac695d3e>] mas_node_count_gfp+0x106/0x140
    [<000000003caeee52>] mas_expected_entries+0x111/0x1b0
    [<0000000081766018>] dup_mmap+0x41f/0xf40
    [<00000000fabaa2cd>] dup_mm+0x91/0x370
    [<000000000e356790>] copy_process+0x6941/0x6d60
    [<000000003b00f59d>] kernel_clone+0xe7/0xa60
    [<00000000aaa2014d>] __do_sys_fork+0x7c/0xb0
    [<0000000046ff4858>] do_syscall_64+0x3b/0x90
    [<00000000b22c7edc>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

BUG: leak checking failed