This patch fixes a bug in ovsthread_key_destruct__.

This patch has not been proposed upstream but will be proposed for 2.4.

diff --git a/lib/ovs-thread.c b/lib/ovs-thread.c

index 529756f..11735f9 100644

--- a/lib/ovs-thread.c

+++ b/lib/ovs-thread.c

@@ -641,8 +641,10 @@ ovsthread_key_destruct__(void *slots_)

     n = n_keys;

     ovs_mutex_unlock(&key_mutex);

-    for (i = 0; i < n / L2_SIZE; i++) {

-        free(slots->p1[i]);

+    if (n > 0) {

+	    for (i = 0; i <= (n - 1) / L2_SIZE; i++) {

+                free(slots->p1[i]);

+        }

     }

     free(slots);

 }