From: Stefan Weil <weil@mail.berlios.de>
Date: Tue, 3 Aug 2010 08:53:45 +0000 (+0000)
Subject: davinci_emac: Fix use after free in davinci_emac_remove
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2a1bc0d56b446104a3a728925b3a7afbef64afa7;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

davinci_emac: Fix use after free in davinci_emac_remove

free_netdev finally calls kfree which makes the contents
of ndev and priv (private data contained in ndev) invalid.

So iounmap should be called before free_netdev.

Cc: David S. Miller <davem@davemloft.net>
Cc: Chaithrika U S <chaithrika@ti.com>
Cc: Sriramakrishnan <srk@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index d0824e322068..7fbd052ddb0a 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -2944,8 +2944,8 @@ static int __devexit davinci_emac_remove(struct platform_device *pdev)
 	release_mem_region(res->start, res->end - res->start + 1);
 
 	unregister_netdev(ndev);
-	free_netdev(ndev);
 	iounmap(priv->remap_addr);
+	free_netdev(ndev);
 
 	clk_disable(emac_clk);
 	clk_put(emac_clk);