[PULL 01/21] vdpa: Skip the maps not in the iova tree

Jason Wang posted 21 patches 2 years, 8 months ago
Maintainers: "Michael S. Tsirkin" <mst@redhat.com>, Peter Xu <peterx@redhat.com>, Jason Wang <jasowang@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, Sven Schnelle <svens@stackframe.org>, Zhang Chen <chen.zhang@intel.com>, Li Zhijian <lizhijian@fujitsu.com>
There is a newer version of this series
[PULL 01/21] vdpa: Skip the maps not in the iova tree
Posted by Jason Wang 2 years, 8 months ago
From: Eugenio Pérez <eperezma@redhat.com>

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 <leiyang@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@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 3ff9ce3..983d369 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);
     }
-- 
2.7.4