[PATCH 3.17 022/122] ieee802154: fix error handling in ieee802154fake_probe()

From: Greg Kroah-Hartman
Date: Fri Dec 05 2014 - 18:52:46 EST

3.17-stable review patch. If anyone has any objections, please let me know.


From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>

[ Upstream commit 8c2dd54485ccee7fc4086611e188478584758c8d ]

In case of any failure ieee802154fake_probe() just calls unregister_netdev().
But it does not look safe to unregister netdevice before it was registered.

The patch implements straightforward resource deallocation in case of
failure in ieee802154fake_probe().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/net/ieee802154/fakehard.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)

--- a/drivers/net/ieee802154/fakehard.c
+++ b/drivers/net/ieee802154/fakehard.c
@@ -377,17 +377,20 @@ static int ieee802154fake_probe(struct p

err = wpan_phy_register(phy);
if (err)
- goto out;
+ goto err_phy_reg;

err = register_netdev(dev);
- if (err < 0)
- goto out;
+ if (err)
+ goto err_netdev_reg;

dev_info(&pdev->dev, "Added ieee802154 HardMAC hardware\n");
return 0;

- unregister_netdev(dev);
+ wpan_phy_unregister(phy);
+ free_netdev(dev);
+ wpan_phy_free(phy);
return err;

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