Vibhor Jain vib-hor

The Production Engineer’s Study Guide

A Synthesis on Performance, Data, and Distributed Systems.

📘 FAIR USE NOTICE

This document is intended for educational and research purposes only. It contains a structured study outline and technical review of foundational systems and infrastructure concepts that are publicly documented and broadly relevant to practitioners in DevOps, SRE, and systems engineering roles.

It does not contain any proprietary information, internal tools, or confidential interview questions or processes from any specific employer. All materials herein are based on publicly available sources, common industry practices, and original synthesis for peer learning.

Slop

This collection is limited to only include the reports that were submitted as security vulnerabilities to the curl bug-bounty program on Hackerone.

Several other issues not included here are highly suspcious as well.

Reports

[Critical] Curl CVE-2023-38545 vulnerability code changes are disclosed on the internet. #2199174

What does it look like?

Here is a simple fragment shader with uniform buffers:

const std = @import("std");
const gpu = std.gpu;

const UBO = extern struct {
    object_color: @Vector(4, f32),
    light_color: @Vector(4, f32),

	const std = @import("std");
	const assert = std.debug.assert;
	const Allocator = std.mem.Allocator;
	const Io = std.Io;

	pub fn main() !void {
	var debug_allocator: std.heap.DebugAllocator(.{}) = .init;
	const gpa = debug_allocator.allocator();
	//const gpa = std.heap.smp_allocator;

	#!/bin/bash
	# shellcheck disable=SC2154
	# (silence shellcheck wrt $cam1 environment variable)
	if [[ $# -lt 4 ]]; then echo "Format: [narrow=1] [cam1=1] $0 width height framerate ms [us]"; exit; fi
	if [[ "$(( $1 % 2 ))" -eq 1 ]]; then echo "width has to be even"; exit; fi
	if [[ "$(( $2 % 2 ))" -eq 1 ]]; then echo "height has to be even"; exit; fi
	export SHTR=""; if [[ $# -gt 4 ]]; then SHTR="--shutter"; fi
	export workaround=""; if [[ "" != "$(grep '=bookworm' /etc/os-release)" ]]; then workaround="--no-raw"; fi
	export d=10; if [[ "" != "$(grep "Revision.*: ...17.$" /proc/cpuinfo)" ]]; then if [[ "$cam1" == "" ]]; then d=10; else d=11; fi; fi
	for((m=0; m<=5; ++m))

	const std = @import("std");

	pub fn build(b: *std.Build) void {
	// Standard target options allows the person running `zig build` to choose
	// what target to build for. Here we do not override the defaults, which
	// means any target is allowed, and the default is native. Other options
	// for restricting supported target set are available.
	const target = b.standardTargetOptions(.{});

	// Standard optimization options allow the person running `zig build` to select