ippool: Fix NULL pointer access

Not all allocated blocks info data structure have a pool associated.

diff --git a/src/ippool.c b/src/ippool.c
index b513b09..58a0d28 100644 (file)
--- a/src/ippool.c
+++ b/src/ippool.c
@@ -296,7 +296,7 @@ update:
                if (!(it->start <= info->start || info->start <= it->end))
                        continue;
 
-               if (it->pool->collision_cb != NULL)
+               if (it->pool != NULL && it->pool->collision_cb != NULL)
                        it->pool->collision_cb(it->pool, it->pool->user_data);
 
                return;