在 2022/8/4 23:54, Eugenio Pérez 写道:
Next patch will skip the registering of dma maps that the vdpa device
rejects in the iova tree. We need to consider that here or we cause a
SIGSEGV accessing result.
Reported-by: Lei Yang <leiy...@redhat.com>
Signed-off-by: Eugenio Pérez <epere...@redhat.com>
Acked-by: Jason Wang <jasow...@redhat.com>
---
hw/virtio/vhost-vdpa.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 3ff9ce3501..983d3697b0 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -289,6 +289,10 @@ static void vhost_vdpa_listener_region_del(MemoryListener
*listener,
};
result = vhost_iova_tree_find_iova(v->iova_tree, &mem_region);
+ if (!result) {
+ /* The memory listener map wasn't mapped */
+ return;
+ }
iova = result->iova;
vhost_iova_tree_remove(v->iova_tree, result);
}