Revert "kernel: revert ip6_tunnel use skb_vlan_inet_prepare() in __ip6_tnl_rcv()"
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This reverts commit ee0b160acc.

A backport commit was missing which was backported upstream with
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.71&id=4ce768ac429ec1c2d4ba63a408fed454ed12b248

Link: https://lore.kernel.org/all/CANn89iL5ksZZCJr7SK9=4Sw6EejdOzr5_m6pBMM8RVtbLy_ACA@mail.gmail.com/

Signed-off-by: Goetz Goerisch <ggoerisch@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22025
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Goetz Goerisch 2026-02-14 20:52:36 +01:00 committed by Hauke Mehrtens
parent 98e7ed1462
commit 385b02614e

View file

@ -1,27 +0,0 @@
From f4d02a22079cc198b26edd0efee5f50e5f3cf0e3 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Fri, 30 Jan 2026 13:34:20 +0100
Subject: Revert "ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()"
This reverts commit df5ffde9669314500809bc498ae73d6d3d9519ac.
This change broke the IPv6 tunneling stack (MAP-E and DS-Lite)
Link: https://lists.openwall.net/netdev/2026/01/30/70
Link: https://github.com/openwrt/openwrt/issues/21737
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
net/ipv6/ip6_tunnel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -970,7 +970,7 @@ static int __ip6_tnl_rcv(struct ip6_tnl
skb_reset_network_header(skb);
- if (skb_vlan_inet_prepare(skb, true)) {
+ if (!pskb_inet_may_pull(skb)) {
DEV_STATS_INC(tunnel->dev, rx_length_errors);
DEV_STATS_INC(tunnel->dev, rx_errors);
goto drop;