修改内核路径

hc

2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/net/ipv6/ip6_tunnel.c
..
..
@@ -1267,8 +1267,8 @@
1267
1267
 	 */
1268
1268
 	max_headroom = LL_RESERVED_SPACE(dst->dev) + sizeof(struct ipv6hdr)
1269
1269
 			+ dst->header_len + t->hlen;
1270
-	if (max_headroom > dev->needed_headroom)
1271
-		dev->needed_headroom = max_headroom;
1270
+	if (max_headroom > READ_ONCE(dev->needed_headroom))
1271
+		WRITE_ONCE(dev->needed_headroom, max_headroom);
1272
1272
 
1273
1273
 	err = ip6_tnl_encap(skb, t, &proto, fl6);
1274
1274
 	if (err)