From 275e0bc12d932abce45ff149308be57ec07463e2 Mon Sep 17 00:00:00 2001 From: Matthias May Date: Fri, 5 Aug 2022 21:19:03 +0200 Subject: [PATCH] geneve: do not use RT_TOS for IPv6 flowlabel commit 99470e99d939716d39428acad37308fd5169a300 upstream. According to Guillaume Nault RT_TOS should never be used for IPv6. Quote: RT_TOS() is an old macro used to interprete IPv4 TOS as described in the obsolete RFC 1349. It's conceptually wrong to use it even in IPv4 code, although, given the current state of the code, most of the existing calls have no consequence. But using RT_TOS() in IPv6 code is always a bug: IPv6 never had a "TOS" field to be interpreted the RFC 1349 way. There's no historical compatibility to worry about. Fixes: 3c9229807100 ("geneve: handle ipv6 priority like ipv4 tos") Acked-by: Guillaume Nault Signed-off-by: Matthias May Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/geneve.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 84f5717c01e2a..5636673b84e7d 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -851,8 +851,7 @@ static struct dst_entry *geneve_get_v6_dst(struct sk_buff *skb, use_cache = false; } - fl6->flowlabel = ip6_make_flowinfo(RT_TOS(prio), - info->key.label); + fl6->flowlabel = ip6_make_flowinfo(prio, info->key.label); dst_cache = (struct dst_cache *)&info->dst_cache; if (use_cache) { dst = dst_cache_get_ip6(dst_cache, &fl6->saddr); -- 2.39.5