sched: Fix memory leak in two error corner cases

If the second in each of these pairs of allocations fails, then the
first one will not be freed in the error route out.

Found by a static code analysis tool.
Signed-off-by: NPhil Carmody <ext-phil.2.carmody@nokia.com>
Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1260448177-28448-1-git-send-email-ext-phil.2.carmody@nokia.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

kernel/sched.c

@@ -9855,13 +9855,15 @@ int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
 		se = kzalloc_node(sizeof(struct sched_entity),
 				  GFP_KERNEL, cpu_to_node(i));
 		if (!se)
-			goto err;
+			goto err_free_rq;
 
 		init_tg_cfs_entry(tg, cfs_rq, se, i, 0, parent->se[i]);
 	}
 
 	return 1;
 
+ err_free_rq:
+	kfree(cfs_rq);
  err:
 	return 0;
 }
@@ -9943,13 +9945,15 @@ int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 		rt_se = kzalloc_node(sizeof(struct sched_rt_entity),
 				     GFP_KERNEL, cpu_to_node(i));
 		if (!rt_se)
-			goto err;
+			goto err_free_rq;
 
 		init_tg_rt_entry(tg, rt_rq, rt_se, i, 0, parent->rt_se[i]);
 	}
 
 	return 1;
 
+ err_free_rq:
+	kfree(rt_rq);
  err:
 	return 0;
 }