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Commit 07dabf20 authored by Jiri Benc's avatar Jiri Benc Committed by David S. Miller
Browse files

vxlan: tun_id is 64bit, not 32bit 



The tun_id field in struct ip_tunnel_key is __be64, not __be32. We need to
convert the vni to tun_id correctly.

Fixes: 54bfd872 ("vxlan: keep flags and vni in network byte order")
Reported-by: default avatarPaolo Abeni <pabeni@redhat.com>
Tested-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarJiri Benc <jbenc@redhat.com>
Acked-by: default avatarThadeu Lima de Souza Cascardo <cascardo@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f169af2c

drivers/net/vxlan.c

+3 −2
Original line number Diff line number Diff line
@@ -1310,9 +1310,10 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb) 
		goto drop;



	if (vxlan_collect_metadata(vs)) {

		__be32 vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);



		tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,

					 vxlan_vni(vxlan_hdr(skb)->vx_vni),

					 sizeof(*md));

					 vxlan_vni_to_tun_id(vni), sizeof(*md));



		if (!tun_dst)

			goto drop;

include/net/vxlan.h

+9 −0
Original line number Diff line number Diff line
@@ -294,6 +294,15 @@ static inline __be32 vxlan_tun_id_to_vni(__be64 tun_id) 
#endif

}



static inline __be64 vxlan_vni_to_tun_id(__be32 vni)

{

#if defined(__BIG_ENDIAN)

	return (__be64)vni;

#else

	return (__be64)vni << 32;

#endif

}



static inline size_t vxlan_rco_start(__be32 vni_field)

{

	return be32_to_cpu(vni_field & VXLAN_RCO_MASK) << VXLAN_RCO_SHIFT;