From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM

---
 kernel/net/ipv6/addrlabel.c |   86 ++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 81 insertions(+), 5 deletions(-)

diff --git a/kernel/net/ipv6/addrlabel.c b/kernel/net/ipv6/addrlabel.c
index c7dc8b2..17ac45a 100644
--- a/kernel/net/ipv6/addrlabel.c
+++ b/kernel/net/ipv6/addrlabel.c
@@ -391,8 +391,8 @@
 	u32 label;
 	int err = 0;
 
-	err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy,
-			  extack);
+	err = nlmsg_parse_deprecated(nlh, sizeof(*ifal), tb, IFAL_MAX,
+				     ifal_policy, extack);
 	if (err < 0)
 		return err;
 
@@ -437,6 +437,7 @@
 {
 	struct ifaddrlblmsg *ifal = nlmsg_data(nlh);
 	ifal->ifal_family = AF_INET6;
+	ifal->__ifal_reserved = 0;
 	ifal->ifal_prefixlen = prefixlen;
 	ifal->ifal_flags = 0;
 	ifal->ifal_index = ifindex;
@@ -466,12 +467,44 @@
 	return 0;
 }
 
+static int ip6addrlbl_valid_dump_req(const struct nlmsghdr *nlh,
+				     struct netlink_ext_ack *extack)
+{
+	struct ifaddrlblmsg *ifal;
+
+	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifal))) {
+		NL_SET_ERR_MSG_MOD(extack, "Invalid header for address label dump request");
+		return -EINVAL;
+	}
+
+	ifal = nlmsg_data(nlh);
+	if (ifal->__ifal_reserved || ifal->ifal_prefixlen ||
+	    ifal->ifal_flags || ifal->ifal_index || ifal->ifal_seq) {
+		NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for address label dump request");
+		return -EINVAL;
+	}
+
+	if (nlmsg_attrlen(nlh, sizeof(*ifal))) {
+		NL_SET_ERR_MSG_MOD(extack, "Invalid data after header for address label dump request");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int ip6addrlbl_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
+	const struct nlmsghdr *nlh = cb->nlh;
 	struct net *net = sock_net(skb->sk);
 	struct ip6addrlbl_entry *p;
 	int idx = 0, s_idx = cb->args[0];
 	int err;
+
+	if (cb->strict_check) {
+		err = ip6addrlbl_valid_dump_req(nlh, cb->extack);
+		if (err < 0)
+			return err;
+	}
 
 	rcu_read_lock();
 	hlist_for_each_entry_rcu(p, &net->ipv6.ip6addrlbl_table.head, list) {
@@ -479,7 +512,7 @@
 			err = ip6addrlbl_fill(skb, p,
 					      net->ipv6.ip6addrlbl_table.seq,
 					      NETLINK_CB(cb->skb).portid,
-					      cb->nlh->nlmsg_seq,
+					      nlh->nlmsg_seq,
 					      RTM_NEWADDRLABEL,
 					      NLM_F_MULTI);
 			if (err < 0)
@@ -499,6 +532,50 @@
 		+ nla_total_size(4);	/* IFAL_LABEL */
 }
 
+static int ip6addrlbl_valid_get_req(struct sk_buff *skb,
+				    const struct nlmsghdr *nlh,
+				    struct nlattr **tb,
+				    struct netlink_ext_ack *extack)
+{
+	struct ifaddrlblmsg *ifal;
+	int i, err;
+
+	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifal))) {
+		NL_SET_ERR_MSG_MOD(extack, "Invalid header for addrlabel get request");
+		return -EINVAL;
+	}
+
+	if (!netlink_strict_get_check(skb))
+		return nlmsg_parse_deprecated(nlh, sizeof(*ifal), tb,
+					      IFAL_MAX, ifal_policy, extack);
+
+	ifal = nlmsg_data(nlh);
+	if (ifal->__ifal_reserved || ifal->ifal_flags || ifal->ifal_seq) {
+		NL_SET_ERR_MSG_MOD(extack, "Invalid values in header for addrlabel get request");
+		return -EINVAL;
+	}
+
+	err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifal), tb, IFAL_MAX,
+					    ifal_policy, extack);
+	if (err)
+		return err;
+
+	for (i = 0; i <= IFAL_MAX; i++) {
+		if (!tb[i])
+			continue;
+
+		switch (i) {
+		case IFAL_ADDRESS:
+			break;
+		default:
+			NL_SET_ERR_MSG_MOD(extack, "Unsupported attribute in addrlabel get request");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
 static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 			  struct netlink_ext_ack *extack)
 {
@@ -511,8 +588,7 @@
 	struct ip6addrlbl_entry *p;
 	struct sk_buff *skb;
 
-	err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy,
-			  extack);
+	err = ip6addrlbl_valid_get_req(in_skb, nlh, tb, extack);
 	if (err < 0)
 		return err;
 

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