[FS#1120] Newifi D1 - Unable to reboot

[LEDE Bugs]

The following task has a new comment added:

FS#1120 - Newifi D1 - Unable to reboot
User who did this - easyteacher (easyteacher)

----------
I uploaded a 17M file generated by dd from /dev/urandom on my phone to the router, and their sha256sum results are the same.
BusyBox v1.28.3 () built-in shell (ash)

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------
 OpenWrt SNAPSHOT, r6727+40-38bd4e4eb5
 -----------------------------------------------------
root at ASUS-PC:~# cd /etc
root at ASUS-PC:/etc# sha256sum testfile
4d6928d6837da79d560f695b8b2311ab4a6e6d6a5c3367d5559a6ed36c517687  testfile
root at ASUS-PC:/etc# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                 9.0M      9.0M         0 100% /rom
/dev/zram0               11.5M    832.0K     10.4M   7% /tmp
tmpfs                   123.8M         0    123.8M   0% /tmp/shm
tmpfs                   123.8M    144.0K    123.6M   0% /tmp/root
tmpfs                   512.0K         0    512.0K   0% /dev
/dev/mmcblk0p2            5.8G     39.1M      5.4G   1% /mnt/mmcblk0p2
/dev/mtdblock6           20.9M     18.7M      2.1M  90% /overlay
overlayfs:/overlay       20.9M     18.7M      2.1M  90% /
root at ASUS-PC:/etc#
----------

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1120#comment4639