diff -ruNp org/libibverbs/src/device.c new/libibverbs/src/device.c
--- org/libibverbs/src/device.c 2007-01-16 09:11:33.000000000 +0530
+++ new/libibverbs/src/device.c 2007-01-23 10:57:46.000000000 +0530
@@ -63,8 +63,10 @@ struct ibv_device **ibv_get_device_list(
                num_devices = ibverbs_init(&device_list);
 
        l = calloc(num_devices + 1, sizeof (struct ibv_device *));
-       for (i = 0; i < num_devices; ++i)
-               l[i] = device_list[i];
+       if (l) {
+               for (i = 0; i < num_devices; ++i)
+                       l[i] = device_list[i];
+       }
 
        pthread_mutex_unlock(&device_list_lock);
 

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