Commit 0c57ff00 authored by Dmitry Skorodumov's avatar Dmitry Skorodumov Committed by Paolo Abeni
Browse files

ipvlan: Ignore PACKET_LOOPBACK in handle_mode_l2() 



Packets with pkt_type == PACKET_LOOPBACK are captured by
handle_frame() function, but they don't have L2 header.
We should not process them in handle_mode_l2().

This doesn't affect old L2 functionality, since handling
was anyway incorrect.

Handle them the same way as in br_handle_frame():
just pass the skb.

To observe invalid behaviour, just start "ping -b" on bcast address
of port-interface.

Fixes: 2ad7bf36 ("ipvlan: Initial check-in of the IPVLAN driver.")
Signed-off-by: default avatarDmitry Skorodumov <skorodumov.dmitry@huawei.com>
Link: https://patch.msgid.link/20251202103906.4087675-1-skorodumov.dmitry@huawei.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 5b48f49e

drivers/net/ipvlan/ipvlan_core.c

+3 −0
Original line number Diff line number Diff line
@@ -737,6 +737,9 @@ static rx_handler_result_t ipvlan_handle_mode_l2(struct sk_buff **pskb, 
	struct ethhdr *eth = eth_hdr(skb);

	rx_handler_result_t ret = RX_HANDLER_PASS;



	if (unlikely(skb->pkt_type == PACKET_LOOPBACK))

		return RX_HANDLER_PASS;



	if (is_multicast_ether_addr(eth->h_dest)) {

		if (ipvlan_external_frame(skb, port)) {

			struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);