Fixed a bug in link_task_to_cpu; needed to check for NULL ptr.

1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/sched_gsn_edf.c b/kernel/sched_gsn_edf.c
index 01924d76e8..ef6ff2f57c 100644
--- a/kernel/sched_gsn_edf.c
+++ b/kernel/sched_gsn_edf.c
@@ -119,7 +119,8 @@ static noinline void link_task_to_cpu(struct task_struct* linked,
                         update_cpu_position(sched);
                         linked = tmp;
                 }
-                linked->rt_param.linked_on = entry->cpu;
+                if (linked) /* might be NULL due to swap */
+                        linked->rt_param.linked_on = entry->cpu;
         }
         entry->linked = linked;
         update_cpu_position(entry);