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Date:   Tue, 10 Aug 2021 19:30:01 +0200
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,, Vadim Fedorenko <>,
        Antoine Tenart <>,
        "David S. Miller" <>,
        Sasha Levin <>
Subject: [PATCH 5.4 28/85] net: ipv6: fix returned variable type in ip6_skb_dst_mtu

From: Antoine Tenart <>

[ Upstream commit 4039146777a91e1576da2bf38e0d8a1061a1ae47 ]

The patch fixing the returned value of ip6_skb_dst_mtu (int -> unsigned
int) was rebased between its initial review and the version applied. In
the meantime fade56410c22 was applied, which added a new variable (int)
used as the returned value. This lead to a mismatch between the function
prototype and the variable used as the return value.

Fixes: 40fc3054b458 ("net: ipv6: fix return value of ip6_skb_dst_mtu")
Cc: Vadim Fedorenko <>
Signed-off-by: Antoine Tenart <>
Signed-off-by: David S. Miller <>
Signed-off-by: Sasha Levin <>
 include/net/ip6_route.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index feeecbc80e72..2c739fc752e1 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -263,7 +263,7 @@ int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 static inline unsigned int ip6_skb_dst_mtu(struct sk_buff *skb)
-	int mtu;
+	unsigned int mtu;
 	struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ?
 				inet6_sk(skb->sk) : NULL;

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