From e8f7f43a4ad451ecfb2689985f99a9e276a08bba Mon Sep 17 00:00:00 2001
From: Julia Lawall <julia@diku.dk>
Date: Sat, 4 Sep 2010 00:12:43 +0000
Subject: [PATCH] drivers/net/fs_enet/fs_enet-main.c: Add of_node_put to avoid
memory leak
In this case, a device_node structure is stored in another structure that
is then freed without first decrementing the reference count of the
device_node structure.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression x;
identifier f;
position p1,p2;
@@
x@p1->f = \(of_find_node_by_path\|of_find_node_by_name\|of_find_node_by_phandle\|of_get_parent\|of_get_next_parent\|of_get_next_child\|of_find_compatible_node\|of_match_node\|of_find_node_by_type\|of_find_node_with_property\|of_find_matching_node\|of_parse_phandle\|of_node_get\)(...);
... when != of_node_put(x)
kfree@p2(x)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("call",p1)
cocci.print_secs("free",p2)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/fs_enet/fs_enet-main.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index d6e3111959ab..d684f187de57 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -1036,7 +1036,7 @@ static int __devinit fs_enet_probe(struct platform_device *ofdev,
ndev = alloc_etherdev(privsize);
if (!ndev) {
ret = -ENOMEM;
- goto out_free_fpi;
+ goto out_put;
}
SET_NETDEV_DEV(ndev, &ofdev->dev);
@@ -1099,6 +1099,7 @@ out_cleanup_data:
out_free_dev:
free_netdev(ndev);
dev_set_drvdata(&ofdev->dev, NULL);
+out_put:
of_node_put(fpi->phy_node);
out_free_fpi:
kfree(fpi);
--
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