From: Dave Ertman The function ice_lag_is_switchdev_running() is being called from outside of the LAG event handler code. This results in the lag->upper_netdev being NULL sometimes. To avoid a NULL-pointer dereference, there needs to be a check before it is dereferenced. Fixes: 776fe19953b0 ("ice: block default rule setting on LAG interface") Signed-off-by: Dave Ertman Reviewed-by: Aleksandr Loktionov Tested-by: Sujai Buvaneswaran Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/ice/ice_lag.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ice/ice_lag.c b/drivers/net/ethernet/intel/ice/ice_lag.c index 2410aee59fb2..d132eb477551 100644 --- a/drivers/net/ethernet/intel/ice/ice_lag.c +++ b/drivers/net/ethernet/intel/ice/ice_lag.c @@ -2226,7 +2226,8 @@ bool ice_lag_is_switchdev_running(struct ice_pf *pf) struct ice_lag *lag = pf->lag; struct net_device *tmp_nd; - if (!ice_is_feature_supported(pf, ICE_F_SRIOV_LAG) || !lag) + if (!ice_is_feature_supported(pf, ICE_F_SRIOV_LAG) || + !lag || !lag->upper_netdev) return false; rcu_read_lock(); -- 2.47.1