Seeing this issue with nested PVE on PVE on EPYC 9124 CPU. Host has SWAP and KSM enabled, although it has plenty of free memory (100GB of 512GB). This cluster currently runs PVE8.4.14 and runs other workloads too besides nested PVE VMs, with Debian, Ubuntu and Windows Server guest OS. Only the nested PVE VMs are affected by the kernel panic mentioned in this thread.