netfilter: nf_queue: remove excess nf_bridge variable

jira LE-3201
cve CVE-2024-35839
Rebuild_History Non-Buildable kernel-rt-4.18.0-553.27.1.rt7.368.el8_10
commit-author Pavel Tikhomirov <[email protected]>
commit aeaa440

We don't really need nf_bridge variable here. And nf_bridge_info_exists
is better replacement for nf_bridge_info_get in case we are only
checking for existence.

	Signed-off-by: Pavel Tikhomirov <[email protected]>
	Reviewed-by: Simon Horman <[email protected]>
	Signed-off-by: Pablo Neira Ayuso <[email protected]>
(cherry picked from commit aeaa440)
	Signed-off-by: Jonathan Maple <[email protected]>

Author: PlaidCat

net/netfilter/nf_queue.c

@@ -82,10 +82,8 @@ static void __nf_queue_entry_init_physdevs(struct nf_queue_entry *entry)
 {
 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 	const struct sk_buff *skb = entry->skb;
-	struct nf_bridge_info *nf_bridge;
 
-	nf_bridge = nf_bridge_info_get(skb);
-	if (nf_bridge) {
+	if (nf_bridge_info_exists(skb)) {
 		entry->physin = nf_bridge_get_physindev(skb);
 		entry->physout = nf_bridge_get_physoutdev(skb);
 	} else {