diff --git a/hw/qxl.c b/hw/qxl.c
index 0b9a4c71ec8bead3e559f2d6b0231152cdd7c354..a6fb7f0acb716e030b8825178e56a3fac0b26665 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -656,8 +656,8 @@ static void qxl_reset_state(PCIQXLDevice *d)
     QXLRam *ram = d->ram;
     QXLRom *rom = d->rom;
 
-    assert(SPICE_RING_IS_EMPTY(&ram->cmd_ring));
-    assert(SPICE_RING_IS_EMPTY(&ram->cursor_ring));
+    assert(!d->ssd.running || SPICE_RING_IS_EMPTY(&ram->cmd_ring));
+    assert(!d->ssd.running || SPICE_RING_IS_EMPTY(&ram->cursor_ring));
     d->shadow_rom.update_id = cpu_to_le32(0);
     *rom = d->shadow_rom;
     qxl_rom_set_dirty(d);
diff --git a/ui/spice-core.c b/ui/spice-core.c
index e142452bb655f5363194bdb0d91e90c41d191f56..1100417698307e36ec40e0efc56d951ccdb54eeb 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -480,7 +480,16 @@ void qemu_spice_init(void)
     port = qemu_opt_get_number(opts, "port", 0);
     tls_port = qemu_opt_get_number(opts, "tls-port", 0);
     if (!port && !tls_port) {
-        return;
+        fprintf(stderr, "neither port nor tls-port specified for spice.");
+        exit(1);
+    }
+    if (port < 0 || port > 65535) {
+        fprintf(stderr, "spice port is out of range");
+        exit(1);
+    }
+    if (tls_port < 0 || tls_port > 65535) {
+        fprintf(stderr, "spice tls-port is out of range");
+        exit(1);
     }
     password = qemu_opt_get(opts, "password");