netdev - [PATCH 3/3] vhost: fix the memory leak which will happen when memory_access

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Message-Id: <20100527190356.cbf2aac7.yoshikawa.takuya@oss.ntt.co.jp>
Date:	Thu, 27 May 2010 19:03:56 +0900
From:	Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
To:	mst@...hat.com
Cc:	kvm@...r.kernel.org, virtualization@...ts.osdl.org,
	netdev@...r.kernel.org
Subject: [PATCH 3/3] vhost: fix the memory leak which will happen when
 memory_access_ok fails

We need to free newmem when vhost_set_memory() fails to complete.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
---
 drivers/vhost/vhost.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 9633a3c..1241a22 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -337,8 +337,10 @@ static long vhost_set_memory(struct vhost_dev *d, struct vhost_memory __user *m)
 		return -EFAULT;
 	}
 
-	if (!memory_access_ok(d, newmem, vhost_has_feature(d, VHOST_F_LOG_ALL)))
+	if (!memory_access_ok(d, newmem, vhost_has_feature(d, VHOST_F_LOG_ALL))) {
+		kfree(newmem);
 		return -EFAULT;
+	}
 	oldmem = d->memory;
 	rcu_assign_pointer(d->memory, newmem);
 	synchronize_rcu();
-- 
1.7.0.4

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