Re: [BUG] KVM: NULL pointer dereference in kvm_tdp_mmu_map under memory pressure

[punixcorn]

To be honest, it could be days. The original crash happened only once 
in a month of heavy use, though my system has been hitting 100% RAM 
usage frequently. 

I suspect a specific transition-like a guest memory zap during high 
host contention-is the trigger. I am currently trying to reproduce 
this by scripting a loop that reloads the guest project (Android emulator)
while the host is under heavy memory load, as that was the environment 
when the crash occurred.

I’ll keep the current debug patch running. If I can't catch it within 
the next 48 hours, I’d be very interested in that more elaborate 
debug patch you mentioned to help track the SPTE lifecycle more 
closely.

Signed-off-by: punixcorn <ohyunwoods663@xxxxxxxxx>