From: Florian Westphal Date: Tue, 13 Oct 2015 12:33:28 +0000 (+0200) Subject: netfilter: nf_queue: remove rcu_read_lock calls X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=81b4325eba6baae80a70d1af866278af38fb6cdd;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Pablo Neira Ayuso --- diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c index efc968807199..5baa8e24e6ac 100644 --- a/net/netfilter/nf_queue.c +++ b/net/netfilter/nf_queue.c @@ -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);