From 3a9450bc06061bbc5813fb27951c6bd6b7e4d351 Mon Sep 17 00:00:00 2001
From: Irbe Krumina <irbe@tailscale.com>
Date: Thu, 4 Jan 2024 12:17:15 +0000
Subject: [PATCH] cmd/containerboot: don't parse empty subnet routes (#10738)

Updates#cleanup

Signed-off-by: Irbe Krumina <irbe@tailscale.com>
---
 cmd/containerboot/main.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/containerboot/main.go b/cmd/containerboot/main.go
index 0aac212c6..5f03f9745 100644
--- a/cmd/containerboot/main.go
+++ b/cmd/containerboot/main.go
@@ -756,7 +756,7 @@ func ensureIPForwarding(root, clusterProxyTarget, tailnetTargetiP, tailnetTarget
 	if tailnetTargetFQDN != "" {
 		v4Forwarding = true
 	}
-	if routes != nil {
+	if routes != nil && *routes != "" {
 		for _, route := range strings.Split(*routes, ",") {
 			cidr, err := netip.ParsePrefix(route)
 			if err != nil {