修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/net/dccp/ipv4.c
..
..
@@ -243,12 +243,12 @@
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 	int err;
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 	struct net *net = dev_net(skb->dev);
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-	/* Only need dccph_dport & dccph_sport which are the first
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-	 * 4 bytes in dccp header.
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-	 * Our caller (icmp_socket_deliver()) already pulled 8 bytes for us.
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-	 */
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-	BUILD_BUG_ON(offsetofend(struct dccp_hdr, dccph_sport) > 8);
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-	BUILD_BUG_ON(offsetofend(struct dccp_hdr, dccph_dport) > 8);
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+	if (!pskb_may_pull(skb, offset + sizeof(*dh)))
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+		return -EINVAL;
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+	dh = (struct dccp_hdr *)(skb->data + offset);
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+	if (!pskb_may_pull(skb, offset + __dccp_basic_hdr_len(dh)))
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+		return -EINVAL;
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+	iph = (struct iphdr *)skb->data;
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 	dh = (struct dccp_hdr *)(skb->data + offset);
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 	sk = __inet_lookup_established(net, &dccp_hashinfo,