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pppoe: drop PACKET_OTHERHOST before skb_share_check()

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Align with ip_rcv() by dropping PACKET_OTHERHOST packets before
calling skb_share_check(). This avoids unnecessary skb processing
for packets that will be discarded anyway.

Signed-off-by: Qingfang Deng <dqfext@gmail.com>
Acked-by: Guillaume Nault <gnault@redhat.com>
Link: https://patch.msgid.link/20250623033431.408810-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Qingfang Deng
2025-06-23 11:34:31 +08:00
committed by Jakub Kicinski
parent c9e78afa68
commit 7eebd219fe
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ppp/pppoe.c
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@@ -372,9 +372,6 @@ static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb)
* can't change.
*/
if (skb->pkt_type == PACKET_OTHERHOST)
goto abort_kfree;
if (sk->sk_state & PPPOX_BOUND) {
ppp_input(&po->chan, skb);
} else if (sk->sk_state & PPPOX_RELAY) {
@@ -418,6 +415,9 @@ static int pppoe_rcv(struct sk_buff *skb, struct net_device *dev,
struct pppoe_net *pn;
int len;
if (skb->pkt_type == PACKET_OTHERHOST)
goto drop;
skb = skb_share_check(skb, GFP_ATOMIC);
if (!skb)
goto out;