diff options
| author | Guillaume Nault <gnault@redhat.com> | 2020-05-14 12:15:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-20 08:20:09 +0200 |
| commit | 5f93b45fa58c08e7b04cb0568016a15bd7d31629 (patch) | |
| tree | 53ef641553d813602b5147c3f91eb5e3ea705fc0 /drivers/net/ppp | |
| parent | ecb8356aafba3aac41cb441735fe2978e70a8e82 (diff) | |
pppoe: only process PADT targeted at local interfaces
[ 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 <xerces9@gmail.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/ppp')
| -rw-r--r-- | drivers/net/ppp/pppoe.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c index a44dd3c8af63..087b01684135 100644 --- a/drivers/net/ppp/pppoe.c +++ b/drivers/net/ppp/pppoe.c @@ -492,6 +492,9 @@ static int pppoe_disc_rcv(struct sk_buff *skb, struct net_device *dev, if (!skb) goto out; + if (skb->pkt_type != PACKET_HOST) + goto abort; + if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) goto abort; |