linux-kernel - [PATCH] Sched/rt:Fix memory leak in alloc_rt_sched

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Date:	Wed,  1 Jul 2015 12:29:26 -0700
From:	Anshul Garg <aksgarg1989@...il.com>
To:	linux-kernel@...r.kernel.org, mingo@...hat.com,
	peterz@...radead.org
Cc:	aksgarg1989@...il.com
Subject: [PATCH] Sched/rt:Fix memory leak in alloc_rt_sched_group

From: Anshul Garg <aksgarg1989@...il.com>

Added code to free allocated memory by function
alloc_rt_sched_group in case kzalloc api fails.

Signed-off-by: Anshul Garg <aksgarg1989@...il.com>
---
 kernel/sched/rt.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index f4d4b07..47213e9 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -177,7 +177,7 @@ int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 		goto err;
 	tg->rt_se = kzalloc(sizeof(rt_se) * nr_cpu_ids, GFP_KERNEL);
 	if (!tg->rt_se)
-		goto err;
+		goto err_free_rt_rq;
 
 	init_rt_bandwidth(&tg->rt_bandwidth,
 			ktime_to_ns(def_rt_bandwidth.rt_period), 0);
@@ -186,7 +186,7 @@ int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 		rt_rq = kzalloc_node(sizeof(struct rt_rq),
 				     GFP_KERNEL, cpu_to_node(i));
 		if (!rt_rq)
-			goto err;
+			goto err_free_rt_se;
 
 		rt_se = kzalloc_node(sizeof(struct sched_rt_entity),
 				     GFP_KERNEL, cpu_to_node(i));
@@ -202,6 +202,10 @@ int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 
 err_free_rq:
 	kfree(rt_rq);
+err_free_rt_se:
+	kfree(tg->rt_se);
+err_free_rt_rq:
+	kfree(tg->rt_rq);
 err:
 	return 0;
 }
-- 
1.7.9.5


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