add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/ipv6/ip6_gre.c
..
..
@@ -955,11 +955,12 @@
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 		goto tx_err;
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 	if (skb->len > dev->mtu + dev->hard_header_len) {
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-		pskb_trim(skb, dev->mtu + dev->hard_header_len);
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+		if (pskb_trim(skb, dev->mtu + dev->hard_header_len))
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+			goto tx_err;
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 		truncate = true;
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 	}
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-	nhoff = skb_network_header(skb) - skb_mac_header(skb);
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+	nhoff = skb_network_offset(skb);
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 	if (skb->protocol == htons(ETH_P_IP) &&
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 	    (ntohs(ip_hdr(skb)->tot_len) > skb->len - nhoff))
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 		truncate = true;
..
..
@@ -968,7 +969,7 @@
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 		int thoff;
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 		if (skb_transport_header_was_set(skb))
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-			thoff = skb_transport_header(skb) - skb_mac_header(skb);
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+			thoff = skb_transport_offset(skb);
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 		else
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 			thoff = nhoff + sizeof(struct ipv6hdr);
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 		if (ntohs(ipv6_hdr(skb)->payload_len) > skb->len - thoff)
..
..
@@ -1015,12 +1016,14 @@
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 					    ntohl(tun_id),
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 					    ntohl(md->u.index), truncate,
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 					    false);
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+			proto = htons(ETH_P_ERSPAN);
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 		} else if (md->version == 2) {
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 			erspan_build_header_v2(skb,
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 					       ntohl(tun_id),
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 					       md->u.md2.dir,
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 					       get_hwid(&md->u.md2),
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 					       truncate, false);
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+			proto = htons(ETH_P_ERSPAN2);
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 		} else {
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 			goto tx_err;
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 		}
..
..
@@ -1043,24 +1046,25 @@
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 			break;
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 		}
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-		if (t->parms.erspan_ver == 1)
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+		if (t->parms.erspan_ver == 1) {
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 			erspan_build_header(skb, ntohl(t->parms.o_key),
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 					    t->parms.index,
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 					    truncate, false);
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-		else if (t->parms.erspan_ver == 2)
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+			proto = htons(ETH_P_ERSPAN);
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+		} else if (t->parms.erspan_ver == 2) {
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 			erspan_build_header_v2(skb, ntohl(t->parms.o_key),
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 					       t->parms.dir,
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 					       t->parms.hwid,
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 					       truncate, false);
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-		else
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+			proto = htons(ETH_P_ERSPAN2);
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+		} else {
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 			goto tx_err;
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+		}
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 		fl6.daddr = t->parms.raddr;
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 	}
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 	/* Push GRE header. */
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-	proto = (t->parms.erspan_ver == 1) ? htons(ETH_P_ERSPAN)
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-					   : htons(ETH_P_ERSPAN2);
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 	gre_build_header(skb, 8, TUNNEL_SEQ, proto, 0, htonl(atomic_fetch_inc(&t->o_seqno)));
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 	/* TooBig packet may have updated dst->dev's mtu */