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netfilter: nf_queue: remove rcu_read_lock calls 

All verdict handlers make use of the nfnetlink .call_rcu callback
so rcu readlock is already held.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
hifive-unleashed-5.1
Florian Westphal 2015-10-13 14:33:28 +02:00 committed by Pablo Neira Ayuso
parent ed78d09d59
commit 81b4325eba
1 changed files with 4 additions and 12 deletions
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16
net/netfilter/nf_queue.c
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@ -124,22 +124,20 @@ int nf_queue(struct sk_buff *skb,
const struct nf_queue_handler *qh;
/* QUEUE == DROP if no one is waiting, to be safe. */
rcu_read_lock();
qh = rcu_dereference(queue_handler);
if (!qh) {
status = -ESRCH;
goto err_unlock;
goto err;
}
afinfo = nf_get_afinfo(state->pf);
if (!afinfo)
goto err_unlock;
goto err;
entry = kmalloc(sizeof(*entry) + afinfo->route_key_size, GFP_ATOMIC);
if (!entry) {
status = -ENOMEM;
goto err_unlock;
goto err;
}
*entry = (struct nf_queue_entry) {
@ -154,8 +152,6 @@ int nf_queue(struct sk_buff *skb,
afinfo->saveroute(skb, entry);
status = qh->outfn(entry, queuenum);
rcu_read_unlock();
if (status < 0) {
nf_queue_entry_release_refs(entry);
goto err;
@ -163,8 +159,6 @@ int nf_queue(struct sk_buff *skb,
return 0;
err_unlock:
rcu_read_unlock();
err:
kfree(entry);
return status;
@ -177,8 +171,6 @@ void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
const struct nf_afinfo *afinfo;
int err;
rcu_read_lock();
nf_queue_entry_release_refs(entry);
/* Continue traversal iff userspace said ok... */
@ -221,7 +213,7 @@ void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
default:
kfree_skb(skb);
}
rcu_read_unlock();
kfree(entry);
}
EXPORT_SYMBOL(nf_reinject);