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/ipv6/exthdrs.c
..
..
@@ -552,24 +552,6 @@
552
552
 		return -1;
553
553
 	}
554
554
 
555
-	if (skb_cloned(skb)) {
556
-		if (pskb_expand_head(skb, IPV6_RPL_SRH_WORST_SWAP_SIZE, 0,
557
-				     GFP_ATOMIC)) {
558
-			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
559
-					IPSTATS_MIB_OUTDISCARDS);
560
-			kfree_skb(skb);
561
-			return -1;
562
-		}
563
-	} else {
564
-		err = skb_cow_head(skb, IPV6_RPL_SRH_WORST_SWAP_SIZE);
565
-		if (unlikely(err)) {
566
-			kfree_skb(skb);
567
-			return -1;
568
-		}
569
-	}
570
-
571
-	hdr = (struct ipv6_rpl_sr_hdr *)skb_transport_header(skb);
572
-
573
555
 	if (!pskb_may_pull(skb, ipv6_rpl_srh_size(n, hdr->cmpri,
574
556
 						  hdr->cmpre))) {
575
557
 		kfree_skb(skb);
..
..
@@ -615,6 +597,17 @@
615
597
 	skb_pull(skb, ((hdr->hdrlen + 1) << 3));
616
598
 	skb_postpull_rcsum(skb, oldhdr,
617
599
 			   sizeof(struct ipv6hdr) + ((hdr->hdrlen + 1) << 3));
600
+	if (unlikely(!hdr->segments_left)) {
601
+		if (pskb_expand_head(skb, sizeof(struct ipv6hdr) + ((chdr->hdrlen + 1) << 3), 0,
602
+				     GFP_ATOMIC)) {
603
+			__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_OUTDISCARDS);
604
+			kfree_skb(skb);
605
+			kfree(buf);
606
+			return -1;
607
+		}
608
+
609
+		oldhdr = ipv6_hdr(skb);
610
+	}
618
611
 	skb_push(skb, ((chdr->hdrlen + 1) << 3) + sizeof(struct ipv6hdr));
619
612
 	skb_reset_network_header(skb);
620
613
 	skb_mac_header_rebuild(skb);