> On 8 Jun 2017, at 10:13 AM, Pravin Shelar <[email protected]> wrote:
>
> On Wed, Jun 7, 2017 at 5:57 PM, Haishuang Yan
> <[email protected]> wrote:
>> When ip_tunnel_rcv fails, the tun_dst won't be freed, so move
>> skb_dst_set to begin and tun_dst would be freed by kfree_skb.
>>
>> CC: Pravin B Shelar <[email protected]>
>> Fixes: 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata.")
>> Signed-off-by: Haishuang Yan <[email protected]>
>> ---
>> net/ipv4/ip_tunnel.c | 6 +++---
>> 1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
>> index b878ecb..27fc20f 100644
>> --- a/net/ipv4/ip_tunnel.c
>> +++ b/net/ipv4/ip_tunnel.c
>> @@ -386,6 +386,9 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct
>> sk_buff *skb,
>> const struct iphdr *iph = ip_hdr(skb);
>> int err;
>>
>> + if (tun_dst)
>> + skb_dst_set(skb, (struct dst_entry *)tun_dst);
>> +
> If dst is set so early, skb_scrub_packet() would remove the tunnel dst
> reference.
> It is better to call skb_dst_drop() from error code path.
Yes, I will change it in v3 commit, thanks!
>
>> #ifdef CONFIG_NET_IPGRE_BROADCAST
>> if (ipv4_is_multicast(iph->daddr)) {
>> tunnel->dev->stats.multicast++;
>> @@ -439,9 +442,6 @@ int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct
>> sk_buff *skb,
>> skb->dev = tunnel->dev;
>> }
>>
>> - if (tun_dst)
>> - skb_dst_set(skb, (struct dst_entry *)tun_dst);
>> -
>> gro_cells_receive(&tunnel->gro_cells, skb);
>> return 0;
>>
>> --
>> 1.8.3.1
>>
>>
>>
>
