6.8-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joshua Hay <joshua.a.hay@xxxxxxxxx>
commit dd19e827d63ac60debf117676d1126bff884bdb8 upstream.
In the very rare case where a packet type is unknown to the driver,
idpf_rx_process_skb_fields would return early without calling
eth_type_trans to set the skb protocol / the network layer handler.
This is especially problematic if tcpdump is running when such a
packet is received, i.e. it would cause a kernel panic.
Instead, call eth_type_trans for every single packet, even when
the packet type is unknown.
Fixes: 3a8845af66ed ("idpf: add RX splitq napi poll support")
Reported-by: Balazs Nemeth <bnemeth@xxxxxxxxxx>
Signed-off-by: Joshua Hay <joshua.a.hay@xxxxxxxxx>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@xxxxxxxxx>
Tested-by: Salvatore Daniele <sdaniele@xxxxxxxxxx>
Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@xxxxxxxxx>
Tested-by: Krishneil Singh <krishneil.k.singh@xxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/idpf/idpf_txrx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/intel/idpf/idpf_txrx.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.c
@@ -2940,6 +2940,8 @@ static int idpf_rx_process_skb_fields(st
rx_ptype = le16_get_bits(rx_desc->ptype_err_fflags0,
VIRTCHNL2_RX_FLEX_DESC_ADV_PTYPE_M);
+ skb->protocol = eth_type_trans(skb, rxq->vport->netdev);
+
decoded = rxq->vport->rx_ptype_lkup[rx_ptype];
/* If we don't know the ptype we can't do anything else with it. Just
* pass it up the stack as-is.
@@ -2950,8 +2952,6 @@ static int idpf_rx_process_skb_fields(st
/* process RSS/hash */
idpf_rx_hash(rxq, skb, rx_desc, &decoded);
- skb->protocol = eth_type_trans(skb, rxq->vport->netdev);
-
if (le16_get_bits(rx_desc->hdrlen_flags,
VIRTCHNL2_RX_FLEX_DESC_ADV_RSC_M))
return idpf_rx_rsc(rxq, skb, rx_desc, &decoded);
