From 33029d4486d71714bfed29c84c5f6f0da1626ec2 Mon Sep 17 00:00:00 2001
From: Jordan Whited <jordan@tailscale.com>
Date: Thu, 10 Oct 2024 15:52:47 -0700
Subject: [PATCH] net/netcheck: fix netcheck cli-triggered nil pointer deref
 (#13782)

Updates #13780

Signed-off-by: Jordan Whited <jordan@tailscale.com>
---
 net/netcheck/netcheck.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netcheck/netcheck.go b/net/netcheck/netcheck.go
index dbb85cf9c..bebf4c9b0 100644
--- a/net/netcheck/netcheck.go
+++ b/net/netcheck/netcheck.go
@@ -940,7 +940,7 @@ func (c *Client) GetReport(ctx context.Context, dm *tailcfg.DERPMap, opts *GetRe
 			}
 		}
 		if len(need) > 0 {
-			if !opts.OnlyTCP443 {
+			if opts == nil || !opts.OnlyTCP443 {
 				// Kick off ICMP in parallel to HTTPS checks; we don't
 				// reuse the same WaitGroup for those probes because we
 				// need to close the underlying Pinger after a timeout