System crash

I load the tensorrt model repeatedly, and then close the program. (repeat it).The ubuntu happen system crash.
If I reboot the PC, it will work.
Do you have any idea to avoid the “system crash” ?

Environment
TensorRT Version: 7.2.2 (nvcr.io/nvidia/tensorrt:20.12-py3)
GPU Type: GeForce RTX 2060
Nvidia Driver Version: 455.45.01
CUDA Version: CUDA 11.1
OS system: ubuntu 18.04

Please run nvidia-bug-report.sh as root after the issue appeared and attach the resulting nvidia-bug-report.log.gz file to your post.