From 22680a11ae2a3061c57123bc6afac2f11b7b51a7 Mon Sep 17 00:00:00 2001
From: Will Norris <will@tailscale.com>
Date: Fri, 7 Apr 2023 16:42:21 -0700
Subject: [PATCH] net/sockstats: return early if no radio period length

Signed-off-by: Will Norris <will@tailscale.com>
---
 net/sockstats/sockstats_tsgo.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/sockstats/sockstats_tsgo.go b/net/sockstats/sockstats_tsgo.go
index a75e3f316..ffbcda964 100644
--- a/net/sockstats/sockstats_tsgo.go
+++ b/net/sockstats/sockstats_tsgo.go
@@ -332,6 +332,9 @@ func (rm *radioMonitor) radioHighPercent() int64 {
 	now := rm.now().Unix()
 	var periodLength int64 = radioSampleSize
 	if t := now - rm.startTime; t < periodLength {
+		if t <= 0 {
+			return 0
+		}
 		periodLength = t
 	}
 	periodStart := now - periodLength // start of current reporting period