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https://github.com/reactos/syzkaller.git
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b97f1e694a
Code in net/ethernet/eth.c does this:
__be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
{
...
if (unlikely(!ether_addr_equal_64bits(eth->h_dest,
dev->dev_addr))) {
if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
skb->pkt_type = PACKET_BROADCAST;
else
skb->pkt_type = PACKET_MULTICAST;
} else {
skb->pkt_type = PACKET_OTHERHOST;
}
}
Multicast and broadcast are distinct and dev->broadcast seems to be ffffffffffff
by default, so add another multicast mac address that will serve as PACKET_MULTICAST.
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