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

punixcorn
2026-04-08T18:43:26Z

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@gmail.com>