udev-rules: fix possible assertion

yuwata · keszybz · commit a6da77b71bd3 · 2018-11-15T15:50:27.000+01:00
On 'remove' action, event-&gt;dev_db_clone is NULL. So, `IMPORT{db}` rule
on 'remove' action triggers assertion. This fixes the issue.
diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
@@ -2043,7 +2043,8 @@ int udev_rules_apply_to_event(
                         const char *key;
 
                         key = rules_str(rules, cur->key.value_off);
-                        if (sd_device_get_property_value(event->dev_db_clone, key, &val) >= 0)
+                        if (event->dev_db_clone &&
+                            sd_device_get_property_value(event->dev_db_clone, key, &val) >= 0)
                                 device_add_property(dev, key, val);
                         else if (cur->key.op != OP_NOMATCH)
                                 goto nomatch;
