From: Dave Ertman david.m.ertman@intel.com
[ Upstream commit f9f83202b7263ac371d616d6894a2c9ed79158ef ]
Currently in the ice driver, the check whether to allow a LLDP packet to egress the interface from the PF_VSI is being based on the SKB's priority field. It checks to see if the packets priority is equal to TC_PRIO_CONTROL. Injected LLDP packets do not always meet this condition.
SCAPY defaults to a sk_buff->protocol value of ETH_P_ALL (0x0003) and does not set the priority field. There will be other injection methods (even ones used by end users) that will not correctly configure the socket so that SKB fields are correctly populated.
Then ethernet header has to have to correct value for the protocol though.
Add a check to also allow packets whose ethhdr->h_proto matches ETH_P_LLDP (0x88CC).
Fixes: 0c3a6101ff2d ("ice: Allow egress control packets from PF_VSI") Signed-off-by: Dave Ertman david.m.ertman@intel.com Tested-by: Tony Brelinski tonyx.brelinski@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_txrx.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index b91dcfd12727..44b6849ec008 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -2331,6 +2331,7 @@ ice_xmit_frame_ring(struct sk_buff *skb, struct ice_ring *tx_ring) struct ice_tx_offload_params offload = { 0 }; struct ice_vsi *vsi = tx_ring->vsi; struct ice_tx_buf *first; + struct ethhdr *eth; unsigned int count; int tso, csum;
@@ -2377,7 +2378,9 @@ ice_xmit_frame_ring(struct sk_buff *skb, struct ice_ring *tx_ring) goto out_drop;
/* allow CONTROL frames egress from main VSI if FW LLDP disabled */ - if (unlikely(skb->priority == TC_PRIO_CONTROL && + eth = (struct ethhdr *)skb_mac_header(skb); + if (unlikely((skb->priority == TC_PRIO_CONTROL || + eth->h_proto == htons(ETH_P_LLDP)) && vsi->type == ICE_VSI_PF && vsi->port_info->qos_cfg.is_sw_lldp)) offload.cd_qw1 |= (u64)(ICE_TX_DESC_DTYPE_CTX |