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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/xfrm/xfrm_input.c
View file

@ -706,7 +706,7 @@ resume:
if (err)
goto drop;
nf_reset(skb);
nf_reset_ct(skb);
if (decaps) {
sp = skb_sec_path(skb);

2
net/xfrm/xfrm_interface.c
View file

@ -185,7 +185,7 @@ static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
skb->skb_iif = 0;
skb->ignore_df = 0;
skb_dst_drop(skb);
nf_reset(skb);
nf_reset_ct(skb);
nf_reset_trace(skb);
if (!xnet)

2
net/xfrm/xfrm_output.c
View file

@ -502,7 +502,7 @@ int xfrm_output_resume(struct sk_buff *skb, int err)
struct net *net = xs_net(skb_dst(skb)->xfrm);
while (likely((err = xfrm_output_one(skb, err)) == 0)) {
nf_reset(skb);
nf_reset_ct(skb);
err = skb_dst(skb)->ops->local_out(net, skb->sk, skb);
if (unlikely(err != 1))

2
net/xfrm/xfrm_policy.c
View file

@ -2808,7 +2808,7 @@ static void xfrm_policy_queue_process(struct timer_list *t)
continue;
}
nf_reset(skb);
nf_reset_ct(skb);
skb_dst_drop(skb);
skb_dst_set(skb, dst);