diff options
| author | Jaco Coetzee <jaco.coetzee@corigine.com> | 2022-11-17 18:37:44 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-11-19 06:41:21 +0300 |
| commit | 0873016d46f6dfafd1bdf4d9b935b3331b226f7c (patch) | |
| tree | 28f1e2719d49fc612f66bfdd037d7e3bef4681ea /drivers/net/ethernet | |
| parent | 4abd9600b9d15d3d92a9ac25cf200422a4c415ee (diff) | |
| download | linux-0873016d46f6dfafd1bdf4d9b935b3331b226f7c.tar.xz | |
nfp: add port from netdev validation for EEPROM access
Setting of the port flag `NFP_PORT_CHANGED`, introduced
to ensure the correct reading of EEPROM data, causes a
fatal kernel NULL pointer dereference in cases where
the target netdev type cannot be determined.
Add validation of port struct pointer before attempting
to set the `NFP_PORT_CHANGED` flag. Return that operation
is not supported if the netdev type cannot be determined.
Fixes: 4ae97cae07e1 ("nfp: ethtool: fix the display error of `ethtool -m DEVNAME`")
Signed-off-by: Jaco Coetzee <jaco.coetzee@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c index 1775997f9c69..991059d6cb32 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c @@ -1432,6 +1432,9 @@ nfp_port_get_module_info(struct net_device *netdev, u8 data; port = nfp_port_from_netdev(netdev); + if (!port) + return -EOPNOTSUPP; + /* update port state to get latest interface */ set_bit(NFP_PORT_CHANGED, &port->flags); eth_port = nfp_port_get_eth_port(port); |