linux-kernel - [PATCH 7/9] staging: otus: use free_netdev(netdev) instead of kfree()

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Date:	Sun, 26 Sep 2010 13:58:25 +0400
From:	Vasiliy Kulikov <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...e.de>, Tejun Heo <tj@...nel.org>,
	Jeff Mahoney <jeffm@...e.com>,
	Mithlesh Thukral <mithlesh@...syssoft.com>,
	Joe Perches <joe@...ches.com>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 7/9] staging: otus: use free_netdev(netdev) instead of kfree()

Freeing netdev without free_netdev() leads to net, tx leaks.
I might lead to dereferencing freed pointer.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

@@
struct net_device* dev;
@@

-kfree(dev)
+free_netdev(dev)
---
 Compile tested.

 drivers/staging/otus/usbdrv.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/otus/usbdrv.c b/drivers/staging/otus/usbdrv.c
index 165a82b..9a5c415 100644
--- a/drivers/staging/otus/usbdrv.c
+++ b/drivers/staging/otus/usbdrv.c
@@ -690,7 +690,7 @@ void usbdrv_clear_structs(struct net_device *dev)
 
     kfree(macp);
 
-    kfree(dev);
+    free_netdev(dev);
 
 }
 
-- 
1.7.0.4

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