From: Vadim Fedorenko <vfedorenko@xxxxxxxx>
commit 40fc3054b45820c28ea3c65e2c86d041dc244a8a upstream.
Commit 628a5c561890 ("[INET]: Add IP(V6)_PMTUDISC_RPOBE") introduced
ip6_skb_dst_mtu with return value of signed int which is inconsistent
with actually returned values. Also 2 users of this function actually
assign its value to unsigned int variable and only __xfrm6_output
assigns result of this function to signed variable but actually uses
as unsigned in further comparisons and calls. Change this function
to return unsigned int value.
Fixes: 628a5c561890 ("[INET]: Add IP(V6)_PMTUDISC_RPOBE")
Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
Signed-off-by: Vadim Fedorenko <vfedorenko@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/net/ip6_route.h | 2 +-
net/ipv6/xfrm6_output.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -262,7 +262,7 @@ static inline bool ipv6_anycast_destinat
int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
int (*output)(struct net *, struct sock *, struct sk_buff *));
-static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
+static inline unsigned int ip6_skb_dst_mtu(struct sk_buff *skb)
{
int mtu;
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -56,7 +56,7 @@ static int __xfrm6_output(struct net *ne
{
struct dst_entry *dst = skb_dst(skb);
struct xfrm_state *x = dst->xfrm;
- int mtu;
+ unsigned int mtu;
bool toobig;
#ifdef CONFIG_NETFILTER
