From: Stefan Hajnoczi <stefa...@redhat.com>
Refuse get_config() requests in excess of sizeof(struct virtio_blk_config).
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
Message-Id: <20201027173528.213464-5-stefa...@redhat.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
block/export/vhost-user-blk-server.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/export/vhost-user-blk-server.c
b/block/export/vhost-user-blk-server.c
index 33cc0818b8..62672d1cb9 100644
--- a/block/export/vhost-user-blk-server.c
+++ b/block/export/vhost-user-blk-server.c
@@ -266,6 +266,9 @@ vu_blk_get_config(VuDev *vu_dev, uint8_t *config, uint32_t
len)
{
VuServer *server = container_of(vu_dev, VuServer, vu_dev);
VuBlkExport *vexp = container_of(server, VuBlkExport, vu_server);
+
+ g_return_val_if_fail(len <= sizeof(struct virtio_blk_config), -1);
+
memcpy(config, &vexp->blkcfg, len);
return 0;
}
--
MST
