diff mbox series

[5.4,20/40] netfilter: conntrack: adjust stop timestamp to real expiry value

Message ID 20210802134336.035104638@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH Aug. 2, 2021, 1:45 p.m. UTC 
From: Florian Westphal <fw@strlen.de>

[ Upstream commit 30a56a2b881821625f79837d4d968c679852444e ]

In case the entry is evicted via garbage collection there is
delay between the timeout value and the eviction event.

This adjusts the stop value based on how much time has passed.

Fixes: b87a2f9199ea82 ("netfilter: conntrack: add gc worker to remove timed-out entries")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/netfilter/nf_conntrack_core.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 9a40312b1f16..4a988ce4264c 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -660,8 +660,13 @@  bool nf_ct_delete(struct nf_conn *ct, u32 portid, int report)
 		return false;
 
 	tstamp = nf_conn_tstamp_find(ct);
-	if (tstamp && tstamp->stop == 0)
+	if (tstamp) {
+		s32 timeout = ct->timeout - nfct_time_stamp;
+
 		tstamp->stop = ktime_get_real_ns();
+		if (timeout < 0)
+			tstamp->stop -= jiffies_to_nsecs(-timeout);
+	}
 
 	if (nf_conntrack_event_report(IPCT_DESTROY, ct,
 				    portid, report) < 0) {