Jetpack4.4, failed to boot after building kernel

[jin-github1002]

hi, JetPack 4.4 is used on TX2. I hope TX2 to support SCTP. Then I have to build kernel for SCTP.
When I reboot , I got the errors flashing on the black screen. Now I stop here and can not enter the Ubuntu 18.04. Could anyone help with this??

What I did is as follows. Is it correct??
1\ downloads source code from website, public_sources.tzb2.
2\ unzip the source:
tar -xvf public_sources.tzb2 split the first directory
tar -xvf kernel_sources.tzb2
3\ copy the original .config to /usr/src/kernel/kernel-4.9/ and edit it ( set all parameters related to SCTP yes, there are three that are set)
4\ make and install
sudo make -j5 Image
sudo make modules
sudo make modules_install
5\ backup the /boot/Image to Image-original
copy the new Image to /boot
6\ reboot

When I plug the keyboard and mouse in USB port. The boot error is:

[jin-github1002]

Here is L4T 32.4.3
I can not use .sh directly because of no source code in github here. Then I use the commands in .sh files. But I failed to change the old kernel to my own kernel. Now the TX2 can not boot. I want to enter the old version without flashing TX2. Because I have lots of project on it. I am afraid them to disappear if flashing TX2 with a new Ubuntu 18.04. Could anybody help with this?

[jendralhxr]

perhaps get a workable backup first https://forums.developer.nvidia.com/t/clone-entire-tx2/57180/5

[jin-github1002]

Then do you know how to deal with this problem? I hope to go back to the old version of kernel. I can go back if entering the Ubuntu. However I can not enter now...