network: 0.881
device: 0.876
graphic: 0.850
instruction: 0.689
semantic: 0.663
other: 0.632
vnc: 0.547
socket: 0.530
boot: 0.494
mistranslation: 0.278
assembly: 0.193
KVM: 0.116

plugins: plugin_mem_cbs is not consistently NULL'ed when returning from execution
Description of problem:
This is an invariant that we should have been checking for; when returning from execution, cpu->plugin_mem_cbs should be NULL. Otherwise we open a door for a use-after-free; admittedly this door isn't that large (it requires a tb_flush to occur while we have the dangling plugin_mem_cbs), but at least one plugin user has encountered this problem: https://lists.nongnu.org/archive/html/qemu-devel/2022-11/msg02703.html