Re: [Qemu-devel] [PATCH] virtio: destroy region cache during reset

[Paolo Bonzini]

On 09/03/2017 12:07, Cornelia Huck wrote:
>>> - Driver #2 uses the device without doing a reset or proper setup
>> Without this patch, even if driver #2 do a reset, it can still use the 
>> old map if it don't set queue pfn.
> 
> Yes, the cleanup-on-reset is definetly needed.

It is good to have for defensiveness, but it would still cause a
segfault so we should also add the checks on vq->vring.desc throughout.

Paolo