linux-kernel - [PATCH 1/9] ibm_newemac: use free_netdev(netdev) instead of kfree()

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Message-Id: <1285495080-21857-1-git-send-email-segooon@gmail.com>
Date:	Sun, 26 Sep 2010 13:58:00 +0400
From:	Vasiliy Kulikov <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	Grant Likely <grant.likely@...retlab.ca>,
	Jiri Pirko <jpirko@...hat.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Subject: [PATCH 1/9] ibm_newemac: 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)
---
 drivers/net/ibm_newemac/core.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c
index 3506fd6..519e19e 100644
--- a/drivers/net/ibm_newemac/core.c
+++ b/drivers/net/ibm_newemac/core.c
@@ -2928,7 +2928,7 @@ static int __devinit emac_probe(struct platform_device *ofdev,
 	if (dev->emac_irq != NO_IRQ)
 		irq_dispose_mapping(dev->emac_irq);
  err_free:
-	kfree(ndev);
+	free_netdev(ndev);
  err_gone:
 	/* if we were on the bootlist, remove us as we won't show up and
 	 * wake up all waiters to notify them in case they were waiting
@@ -2971,7 +2971,7 @@ static int __devexit emac_remove(struct platform_device *ofdev)
 	if (dev->emac_irq != NO_IRQ)
 		irq_dispose_mapping(dev->emac_irq);
 
-	kfree(dev->ndev);
+	free_netdev(dev->ndev);
 
 	return 0;
 }
-- 
1.7.0.4

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