From: Guillaume Nault <[email protected]> [ Upstream commit b8c158395119be62294da73646a3953c29ac974b ]
We don't want to disconnect a session because of a stray PADT arriving while the interface is in promiscuous mode. Furthermore, multicast and broadcast packets make no sense here, so only PACKET_HOST is accepted. Reported-by: David Balažic <[email protected]> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Guillaume Nault <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/ppp/pppoe.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/ppp/pppoe.c +++ b/drivers/net/ppp/pppoe.c @@ -490,6 +490,9 @@ static int pppoe_disc_rcv(struct sk_buff if (!skb) goto out; + if (skb->pkt_type != PACKET_HOST) + goto abort; + if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) goto abort;
