|
From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] [PATCH] virtio: destroy region cache during reset |
Date: | Tue, 7 Mar 2017 11:55:52 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0 |
On 07/03/2017 09:47, Jason Wang wrote: > We don't destroy region cache during reset which can make the maps > of previous driver leaked to a buggy or malicious driver that don't > set vring address before starting to use the device. I'm still not sure as to how this can happen. Reset does clear desc/used/avail, which should then be checked before accessing the caches. Paolo > Fix this by > destroy the region cache during reset and validate it before trying to > use them. While at it, also validate address_space_cache_init() during > virtio_init_region_cache() to make sure we have a correct region > cache.
[Prev in Thread] | Current Thread | [Next in Thread] |