Guest stuck when using RTX 3060 PCI passthrough

I’m trying to passthrough RTX 3060 to instance (virtual machine) under KVM (qemu).
Host and VM are all ubuntu20.04.

At the beginning, everything is all right. After a while whitout any action, guest system stucked.
I cannot log in the system. And I checked qemu process in the host system with top.

After this, I reboot guest system, and got kernel log.
kernel.log (970.6 KB)

And we have dozens of devices, only a few of which have this problem.

anyone help?