check return value for libudev/udev_device_get_action

Signed-off-by: weizhixiang <1138871845@qq.com>

diff --git a/test/litest.c b/test/litest.c
index ac8cda9688e7f47535cca645550d44b21022d5d2..8ac6e260348dc17bc2d93e20ea7da6a9a02dd1a0 100644 (file)
--- a/test/litest.c
+++ b/test/litest.c
@@ -1895,7 +1895,7 @@ udev_wait_for_device_event(struct udev_monitor *udev_monitor,
                udev_device = udev_monitor_receive_device(udev_monitor);
                litest_assert_notnull(udev_device);
                udev_action = udev_device_get_action(udev_device);
-               if (!streq(udev_action, udev_event)) {
+               if (!udev_action || !streq(udev_action, udev_event)) {
                        udev_device_unref(udev_device);
                        continue;
                }