diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2025-07-30 22:23:23 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-08-05 16:00:53 -0700 |
| commit | e88fbc30dda1cb7438515303704ceddb3ade4ecd (patch) | |
| tree | 617431afedf92badf206039fc06d32ac71f3fdb5 | |
| parent | 966c529aa177e154722386abc4c46027ce7cf7ce (diff) | |
net: ftgmac100: fix potential NULL pointer access in ftgmac100_phy_disconnect
After the call to phy_disconnect() netdev->phydev is reset to NULL.
So fixed_phy_unregister() would be called with a NULL pointer as argument.
Therefore cache the phy_device before this call.
Fixes: e24a6c874601 ("net: ftgmac100: Get link speed and duplex for NC-SI")
Cc: stable@vger.kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Dawid Osuchowski <dawid.osuchowski@linux.intel.com>
Link: https://patch.msgid.link/2b80a77a-06db-4dd7-85dc-3a8e0de55a1d@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/faraday/ftgmac100.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 5d0c0906878d..a863f7841210 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1750,16 +1750,17 @@ err_register_mdiobus: static void ftgmac100_phy_disconnect(struct net_device *netdev) { struct ftgmac100 *priv = netdev_priv(netdev); + struct phy_device *phydev = netdev->phydev; - if (!netdev->phydev) + if (!phydev) return; - phy_disconnect(netdev->phydev); + phy_disconnect(phydev); if (of_phy_is_fixed_link(priv->dev->of_node)) of_phy_deregister_fixed_link(priv->dev->of_node); if (priv->use_ncsi) - fixed_phy_unregister(netdev->phydev); + fixed_phy_unregister(phydev); } static void ftgmac100_destroy_mdio(struct net_device *netdev) |