raw: remove unused variables from raw6_icmp_error()

mainline inclusion
from mainline-v6.0-rc1
commit c4fceb46
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6ECEK
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c4fceb46add65481ef0dfb79cad24c3c269b4cad

--------------------------------

saddr and daddr are set but not used.

Fixes: ba44f818 ("raw: use more conventional iterators")
Reported-by: Nkernel test robot <lkp@intel.com>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Acked-by: NJonathan Lemon <jonathan.lemon@gmail.com>
Link: https://lore.kernel.org/r/20220622032303.159394-1-edumazet@google.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NZiyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: NYue Haibing <yuehaibing@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

net/ipv6/raw.c

@@ -332,7 +332,6 @@ static void rawv6_err(struct sock *sk, struct sk_buff *skb,
 void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 		u8 type, u8 code, int inner_offset, __be32 info)
 {
-	const struct in6_addr *saddr, *daddr;
 	struct net *net = dev_net(skb->dev);
 	struct hlist_nulls_head *hlist;
 	struct hlist_nulls_node *hnode;
@@ -345,8 +344,6 @@ void raw6_icmp_error(struct sk_buff *skb, int nexthdr,
 	sk_nulls_for_each(sk, hnode, hlist) {
 		/* Note: ipv6_hdr(skb) != skb->data */
 		const struct ipv6hdr *ip6h = (const struct ipv6hdr *)skb->data;
-		saddr = &ip6h->saddr;
-		daddr = &ip6h->daddr;
 
 		if (!raw_v6_match(net, sk, nexthdr, &ip6h->saddr, &ip6h->daddr,
 				  inet6_iif(skb), inet6_iif(skb)))