[PATCH 5.2 093/124] netfilter: nf_flow_table: clear skb tstamp before xmit

[Greg Kroah-Hartman]

From: Florian Westphal <f...@strlen.de>

[ Upstream commit de20900fbe1c4fd36de25a7a5a43223254ecf0d0 ]

If 'fq' qdisc is used and a program has requested timestamps,
skb->tstamp needs to be cleared, else fq will treat these as
'transmit time'.

Signed-off-by: Florian Westphal <f...@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 net/netfilter/nf_flow_table_ip.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c
index d68c801dd614b..b9e7dd6e60ce2 100644
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -228,7 +228,6 @@ static unsigned int nf_flow_xmit_xfrm(struct sk_buff *skb,
 {
        skb_orphan(skb);
        skb_dst_set_noref(skb, dst);
-       skb->tstamp = 0;
        dst_output(state->net, state->sk, skb);
        return NF_STOLEN;
 }
@@ -284,6 +283,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
        flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
        iph = ip_hdr(skb);
        ip_decrease_ttl(iph);
+       skb->tstamp = 0;
 
        if (unlikely(dst_xfrm(&rt->dst))) {
                memset(skb->cb, 0, sizeof(struct inet_skb_parm));
@@ -512,6 +512,7 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
        flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
        ip6h = ipv6_hdr(skb);
        ip6h->hop_limit--;
+       skb->tstamp = 0;
 
        if (unlikely(dst_xfrm(&rt->dst))) {
                memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
-- 
2.20.1