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netfilter: drop bridge nf reset from nf_reset

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commit 174e23810c
("sk_buff: drop all skb extensions on free and skb scrubbing") made napi
recycle always drop skb extensions.  The additional skb_ext_del() that is
performed via nf_reset on napi skb recycle is not needed anymore.

Most nf_reset() calls in the stack are there so queued skb won't block
'rmmod nf_conntrack' indefinitely.

This removes the skb_ext_del from nf_reset, and renames it to a more
fitting nf_reset_ct().

In a few selected places, add a call to skb_ext_reset to make sure that
no active extensions remain.

I am submitting this for "net", because we're still early in the release
cycle.  The patch applies to net-next too, but I think the rename causes
needless divergence between those trees.

Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Florian Westphal <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>
This commit is contained in:
Florian Westphal 2019-09-29 20:54:03 +02:00 • committed by Pablo Neira Ayuso
commit 895b5c9f20
31 changed files with 40 additions and 45 deletions
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2
net/l2tp/l2tp_core.c
View file

@ -1078,7 +1078,7 @@ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
IPSKB_REROUTED);
nf_reset(skb);
nf_reset_ct(skb);
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {

2
net/l2tp/l2tp_eth.c
View file

@ -151,7 +151,7 @@ static void l2tp_eth_dev_recv(struct l2tp_session *session, struct sk_buff *skb,
skb->ip_summed = CHECKSUM_NONE;
skb_dst_drop(skb);
nf_reset(skb);
nf_reset_ct(skb);
rcu_read_lock();
dev = rcu_dereference(spriv->dev);

2
net/l2tp/l2tp_ip.c
View file

@ -193,7 +193,7 @@ pass_up:
if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_put;
nf_reset(skb);
nf_reset_ct(skb);
return sk_receive_skb(sk, skb, 1);

2
net/l2tp/l2tp_ip6.c
View file

@ -206,7 +206,7 @@ pass_up:
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_put;
nf_reset(skb);
nf_reset_ct(skb);
return sk_receive_skb(sk, skb, 1);