BUG: memory leak
unreferenced object 0xffff888017703400 (size 256):
  comm "syz-executor.5", pid 6969, jiffies 4295764858 (age 19.181s)
  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:
    [<00000000234cc17d>] mas_alloc_nodes+0x36e/0x6a0
    [<00000000777bb33f>] mas_node_count+0x101/0x130
    [<000000003cdf7f3c>] mas_expected_entries+0x10c/0x1b0
    [<000000005b93565c>] dup_mmap+0x433/0xf80
    [<0000000018532679>] dup_mm+0x91/0x370
    [<000000006e34d865>] copy_process+0x694b/0x6d60
    [<0000000012f3d811>] kernel_clone+0xe7/0xa60
    [<0000000058dd2fbc>] __do_sys_clone3+0x1cd/0x2d0
    [<000000005243e15c>] do_syscall_64+0x3b/0x90
    [<00000000a47961ba>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

BUG: leak checking failed