netdev - [PATCH iwl-next v4 03/13] ice: Don't tx before switchdev is fully configured

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Message-Id: <20230524122121.15012-4-wojciech.drewek@intel.com>
Date: Wed, 24 May 2023 14:21:11 +0200
From: Wojciech Drewek <wojciech.drewek@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	alexandr.lobakin@...el.com,
	david.m.ertman@...el.com,
	michal.swiatkowski@...ux.intel.com,
	marcin.szycik@...ux.intel.com,
	pawel.chmielewski@...el.com,
	sridhar.samudrala@...el.com,
	pmenzel@...gen.mpg.de,
	simon.horman@...igine.com,
	dan.carpenter@...aro.org
Subject: [PATCH iwl-next v4 03/13] ice: Don't tx before switchdev is fully configured

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@...gen.mpg.de>
Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
---
 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 be5b22691f7c..15a4c148c28b 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -331,6 +331,9 @@ 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