path: root/drivers/net
diff options
authorBruno Carneiro da Cunha <brunocarneirodacunha@usp.br>2019-12-05 17:16:26 -0300
committerDavid S. Miller <davem@davemloft.net>2019-12-06 20:51:19 -0800
commit04aa1bc42e4d31a7c58f38eefc323ac395517635 (patch)
tree7ea4fe671733582122197606e02c78fa4ba04d06 /drivers/net
parenttcp: md5: fix potential overestimation of TCP option space (diff)
lpc_eth: kernel BUG on remove
We may have found a bug in the nxp/lpc_eth.c driver. The function platform_set_drvdata() is called twice, the second time it is called, in lpc_mii_init(), it overwrites the struct net_device which should be at pdev->dev->driver_data with pldat->mii_bus. When trying to remove the driver, in lpc_eth_drv_remove(), platform_get_drvdata() will return the pldat->mii_bus pointer and try to use it as a struct net_device pointer. This causes unregister_netdev to segfault and generate a kernel BUG. Is this reproducible? Signed-off-by: Daniel Martinez <linux@danielsmartinez.com> Signed-off-by: Bruno Carneiro da Cunha <brunocarneirodacunha@usp.br> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index ebb81d6d4ca1..656169214cdb 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -817,8 +817,6 @@ static int lpc_mii_init(struct netdata_local *pldat)
pldat->mii_bus->priv = pldat;
pldat->mii_bus->parent = &pldat->pdev->dev;
- platform_set_drvdata(pldat->pdev, pldat->mii_bus);
node = of_get_child_by_name(pldat->pdev->dev.of_node, "mdio");
err = of_mdiobus_register(pldat->mii_bus, node);