vhost: reset metadata cache when initializing new IOTLB
We need to reset metadata cache during new IOTLB initialization,
otherwise the stale pointers to previous IOTLB may be still accessed
which will lead a use after free.
Reported-by: syzbot+c51e6736a1bf614b3272@syzkaller.appspotmail.com
Fixes: f889491380
("vhost: introduce O(1) vq metadata cache")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Родитель
0dcb82254d
Коммит
b13f9c6364
|
@ -1560,9 +1560,12 @@ int vhost_init_device_iotlb(struct vhost_dev *d, bool enabled)
|
|||
d->iotlb = niotlb;
|
||||
|
||||
for (i = 0; i < d->nvqs; ++i) {
|
||||
mutex_lock(&d->vqs[i]->mutex);
|
||||
d->vqs[i]->iotlb = niotlb;
|
||||
mutex_unlock(&d->vqs[i]->mutex);
|
||||
struct vhost_virtqueue *vq = d->vqs[i];
|
||||
|
||||
mutex_lock(&vq->mutex);
|
||||
vq->iotlb = niotlb;
|
||||
__vhost_vq_meta_reset(vq);
|
||||
mutex_unlock(&vq->mutex);
|
||||
}
|
||||
|
||||
vhost_umem_clean(oiotlb);
|
||||
|
|
Загрузка…
Ссылка в новой задаче