Fix crash when no actions are specified.

Actions are allocated as a pointer to an array of actions in flows.  When
flows are freed, the code was always freeing the action pointer.
Under some circumstances the pointer may not be set.

diff --git a/datapath/flow.c b/datapath/flow.c
index a2c96ab..71dd823 100644 (file)
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -187,7 +187,8 @@ void flow_free(struct sw_flow *flow)
 {
        if (unlikely(!flow))
                return;
-       kfree(flow->actions);
+       if (flow->actions)
+               kfree(flow->actions);
        kmem_cache_free(flow_cache, flow);
 }
 EXPORT_SYMBOL(flow_free);

diff --git a/switch/switch-flow.c b/switch/switch-flow.c
index 9c9538d..16a7177 100644 (file)
--- a/switch/switch-flow.c
+++ b/switch/switch-flow.c
@@ -191,7 +191,9 @@ flow_free(struct sw_flow *flow)
     if (!flow) {
         return; 
     }
-    free(flow->actions);
+    if (flow->actions) {
+        free(flow->actions);
+    }
     free(flow);
 }