https://sankethbk.github.io/blog/tags/local-setup/Recent content in Local-Setup on Sanketh's BlogHugo -- 0.163.1en-usSun, 01 Mar 2026 00:00:00 +0000https://sankethbk.github.io/blog/posts/operating-systems/linux/2026-05-10-setting-up-linux-kernel/Sun, 01 Mar 2026 00:00:00 +0000https://sankethbk.github.io/blog/posts/operating-systems/linux/2026-05-10-setting-up-linux-kernel/<h1 id="kernel-lab-setup-checklist">Kernel Lab Setup Checklist</h1> <h2 id="cve-2026-31431-copy-fail--debug-environment">CVE-2026-31431 (Copy Fail) — Debug Environment</h2> <p>This checklist covers everything needed to go from zero to a running kernel inside QEMU with GDB attached and a breakpoint set in the vulnerable function. Follow in order — each step depends on the previous one.</p> <hr> <h2 id="theory-what-were-building-and-why">Theory: What We&rsquo;re Building and Why</h2> <pre tabindex="0"><code>Your Ubuntu laptop ├── QEMU ← virtual machine running your custom kernel │ └── bzImage ← the compiled kernel (compressed, no debug symbols) └── GDB ← debugger attached to QEMU via TCP port 1234 └── vmlinux ← same kernel with full debug symbols (used by GDB only) </code></pre><p><strong>Why two kernel files?</strong></p>