[PATCH AUTOSEL 6.4 04/41] ice: Don't tx before switchdev is fully configured

Sasha Levin
2023-09-08T18:18:50Z

From: Wojciech Drewek <wojciech.drewek@intel.com>

[ Upstream commit 7aa529a69e92b9aff585e569d5003f7c15d8d60b ]

There is possibility that ice_eswitch_port_start_xmit might be
called while some resources are still not allocated which might
cause NULL pointer dereference. Fix this by checking if switchdev
configuration was finished.

Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/intel/ice/ice_eswitch.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch.c b/drivers/net/ethernet/intel/ice/ice_eswitch.c
index 03e5139849462..eab2481114ef3 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -361,6 +361,9 @@ ice_eswitch_port_start_xmit(struct sk_buff *skb, struct net_device *netdev)
np = netdev_priv(netdev);
vsi = np->vsi;

+ if (!vsi || !ice_is_switchdev_running(vsi->back))
+ return NETDEV_TX_BUSY;
+
if (ice_is_reset_in_progress(vsi->back->state) ||
test_bit(ICE_VF_DIS, vsi->back->state))
return NETDEV_TX_BUSY;
--
2.40.1