# Security Review Report

**Branch**: feat-populate-search-result-line-range -> main
**Date**: 2026-05-23T11:28
**PR**: #249

## Issues in Your Changes (BLOCKING)

### CRITICAL

(none)

### HIGH

(none)

## Issues in Code You Touched (Should Fix)

(none)

## Pre-existing Issues (Not Blocking)

(none)

## Suggestions (Lower Confidence)

(none)

## Summary

| Category | CRITICAL | HIGH | MEDIUM | LOW |
|----------|----------|------|--------|-----|
| Blocking | 0 | 0 | 0 | 0 |
| Should Fix | 0 | 0 | 0 | 0 |
| Pre-existing | 0 | 0 | 0 | 0 |

**Security Score**: 10
**Recommendation**: APPROVED

## Analysis Notes

This PR adds two pure computational functions (`byte_offset_to_line`, `compute_line_range`) and threads a new `line_range: Option<Range<usize>>` field through the snippet extraction pipeline. The security surface is minimal:

1. **Input validation** -- `byte_offset_to_line` clamps the offset to `content.len()` via `.min()`, preventing out-of-bounds access. `compute_line_range` returns `0..0` for empty input. Both are safe against malformed byte offsets.

2. **No new I/O** -- The new functions operate on byte slices already loaded in memory. No new file reads, network calls, or subprocess spawns are introduced.

3. **No injection vectors** -- Output is `Range<usize>` (two machine-sized integers) serialized via serde. No user-controlled strings flow into the output, and the data format (`{"start": N, "end": M}`) has no injection-capable structure.

4. **Memory safety** -- All operations use safe Rust. The `content[..safe_offset]` slice is bounds-checked at compile time. Iterator chains are lazy and bounded by `match_positions.len()`.

5. **No secrets or configuration changes** -- No new environment variables, credentials, or configuration surfaces.

6. **Pre-existing path traversal** -- The `root.join(rel_path)` in `extract_snippet` (line 124) does not validate that the resulting path stays within `root`. This is a pre-existing concern not introduced by this PR and does not warrant blocking. The `rel_path` comes from the search index (not user input at query time), and the file is only read, not written. Noted for completeness only.
