bradfitz

tailscale v1.98.4: tgz vs docker image build comparison

Comparison of the tailscaled and tailscale (CLI) binaries shipped in two artifacts that both claim to be Tailscale v1.98.4:

• tgz: https://pkgs.tailscale.com/stable/tailscale_1.98.4_amd64.tgz
• docker: tailscale/tailscale:v1.98.4 (digest sha256:25cde9ad…)

Both binaries report tailscale.com v1.98.4 and were compiled with Go 1.26.3, but every other relevant signal differs: build flags, CGO setting, embedded VCS

bradfitz

Lutron LEAP Protocol Specification

LLM summary of the LEAP protocol based on reading pylutron-caseta (Python) and lutron-leap-js (TypeScript)

LEAP (Local Execution Access Protocol) is a proprietary JSON-over-TLS protocol used by Lutron smart lighting processors — including Caseta Smart Bridge, RadioRA 3 (RA3), and HomeWorks QSX (HWQSX) — for local LAN control of lighting, shading, fan, and sensor devices.

---

Table of Contents

bradfitz

(Claude Code; Opus 4.6)

Windows Stack Memory Corruption Investigation

Summary

Runtime stack memory corruption on Windows amd64 causes a DEP violation (Exception 0xc0000005 code 0x8) when a goroutine jumps to a corrupted return address. The corruption always overwrites the high 32 bits of a return address, replacing a valid code pointer (e.g. 0x00007ff6XXXXXXXX) with a value whose high 32 bits are a

bradfitz

set -eu

mkdir -p /tmp/foo && cd /tmp/foo

git init
mkdir testing
touch testing.md testing/empty-dir
git add testing testing.md
git commit -m 'foo'
git cat-file -p HEAD^{tree}

bradfitz

package main

import (
	"bytes"
	"flag"
	"io/fs"
	"log"
	"os"
	"path/filepath"
	"strings"

bradfitz

diff --git a/src/unique/handle.go b/src/unique/handle.go
index abc620f60f..95395a6b85 100644
--- a/src/unique/handle.go
+++ b/src/unique/handle.go
@@ -10,6 +10,7 @@ import (
 	"internal/weak"
 	"runtime"
 	"sync"
+	"sync/atomic"
 	_ "unsafe"

bradfitz

diff --git a/src/unique/handle.go b/src/unique/handle.go
index 520ab70f8c..113eb90fd9 100644
--- a/src/unique/handle.go
+++ b/src/unique/handle.go
@@ -9,6 +9,8 @@ import (
 	isync "internal/sync"
 	"runtime"
 	"sync"
+	"sync/atomic"
+	"time"

bradfitz

{
    "Hostname": "tskrazy",
    "Update": {
        "Hostname": "192.168.64.5",
        "HTTPPassword": "xxxxx"
    },
    "Packages": [
        "github.com/gokrazy/fbstatus",
        "github.com/gokrazy/hello",
        "github.com/gokrazy/serial-busybox",

bradfitz

=== RUN   TestRepoStress
=== RUN   TestRepoStress/normal
    repo_test.go:61: after 10000, +131.322375ms
    repo_test.go:61: after 20000, +145.117792ms
    repo_test.go:61: after 30000, +157.902291ms
    repo_test.go:61: after 40000, +156.549084ms
    repo_test.go:61: after 50000, +155.986ms
    repo_test.go:61: after 60000, +155.7875ms
    repo_test.go:61: after 70000, +157.752625ms
    repo_test.go:61: after 80000, +163.210541ms

bradfitz

package main

import (
        "io"
        "log"
        "net"
        "net/http"
        "os"
)