Addressing PR comments #700

Claude · 2026-02-11T15:30:07Z

No description provided.

Co-authored-by: lpcox <[email protected]>

github-actions · 2026-02-12T04:33:45Z

Chroot tests passed! Smoke Chroot - All security and functionality tests succeeded.

github-actions · 2026-02-12T04:33:50Z

📰 VERDICT: Smoke Copilot has concluded. All systems operational. This is a developing story. 🎤

github-actions · 2026-02-12T04:33:51Z

🎬 THE END — Smoke Claude MISSION: ACCOMPLISHED! The hero saves the day! ✨

github-actions · 2026-02-12T04:34:21Z

⚠️ Coverage Regression Detected

This PR decreases test coverage. Please add tests to maintain coverage levels.

Overall Coverage

Metric	Base	PR	Delta
Lines	82.34%	82.33%	📉 -0.01%
Statements	82.38%	82.38%	➡️ +0.00%
Functions	82.14%	82.14%	➡️ +0.00%
Branches	74.70%	74.64%	📉 -0.06%

📁 Per-file Coverage Changes (1 files)

File	Lines (Before → After)	Statements (Before → After)
`src/docker-manager.ts`	83.9% → 83.8% (-0.04%)	83.3% → 83.3% (-0.04%)

Coverage comparison generated by scripts/ci/compare-coverage.ts

github-actions · 2026-02-12T04:36:57Z

Smoke Test Results

Last 2 Merged PRs:

[docs] docs: add missing CLI flags to reference documentation #695: [docs] docs: add missing CLI flags to reference documentation
fix: use tmpfs to hide /tmp/gh-aw/mcp-logs directory from containers #709: fix: use tmpfs to hide /tmp/gh-aw/mcp-logs directory from containers

Test Results:

✅ GitHub MCP: Retrieved PR data
✅ Playwright: Page title contains "GitHub"
✅ File Writing: Created test file
✅ Bash Tool: Verified file content

Status: PASS

AI generated by Smoke Claude

github-actions · 2026-02-12T04:37:01Z

Go Build Test Results

Project	Download	Tests	Status
color	✅	1/1	PASS
env	✅	1/1	PASS
uuid	✅	1/1	PASS

Overall: PASS ✅

All Go projects built and tested successfully.

AI generated by Build Test Go

github-actions · 2026-02-12T04:37:04Z

Bun Build Test Results

Project	Install	Tests	Status
elysia	✅	1/1	PASS
hono	✅	1/1	PASS

Overall: PASS ✅

All Bun projects built and tested successfully.

AI generated by Build Test Bun

github-actions · 2026-02-12T04:37:05Z

Smoke Test Results

Last 2 merged PRs:

[docs] docs: add missing CLI flags to reference documentation #695 - docs: add missing CLI flags
fix: use tmpfs to hide /tmp/gh-aw/mcp-logs directory from containers #709 - fix: use tmpfs to hide /tmp/gh-aw/mcp-logs

✅ GitHub MCP - PASS
✅ Playwright - PASS (title: "GitHub · Change is constant...")
✅ File Creation - PASS
✅ Bash Tools - PASS

Overall: PASS 🎉

AI generated by Smoke Copilot

github-actions · 2026-02-12T04:37:15Z

Node.js Build Test Results ✅

All Node.js projects built and tested successfully!

Project	Install	Tests	Status
clsx	✅	PASS	✅ PASS
execa	✅	PASS	✅ PASS
p-limit	✅	PASS	✅ PASS

Overall: ✅ PASS

All dependencies installed without vulnerabilities and all test suites passed.

AI generated by Build Test Node.js

github-actions · 2026-02-12T04:37:17Z

.NET Build Test Results

Project	Restore	Build	Run	Status
hello-world	✅	✅	✅	PASS
json-parse	✅	✅	✅	PASS

Overall: PASS ✅

All .NET projects successfully restored dependencies, built, and ran without errors.

AI generated by Build Test .NET

github-actions · 2026-02-12T04:37:30Z

Build Test: Rust ✅

Project	Build	Tests	Status
fd	✅	1/1	PASS ✅
zoxide	✅	1/1	PASS ✅

Overall: PASS ✅

All Rust projects built and tested successfully.

AI generated by Build Test Rust

github-actions · 2026-02-12T04:37:31Z

C++ Build Test Results

Project	CMake	Build	Status
fmt	✅	✅	PASS
json	✅	✅	PASS

Overall: PASS ✅

All C++ projects configured and built successfully.

AI generated by Build Test C++

Copilot

Pull request overview

Closes a credential-exfiltration bypass in chroot mode by ensuring sensitive files are hidden via /dev/null overlays at both home mount locations ($HOME and /host$HOME), and adds integration coverage + documentation to prevent regression.

Changes:

Apply selective credential-hiding mounts in all non-full-filesystem modes (including chroot direct-home path).
Add chroot-mode integration tests targeting the direct-home bypass scenario and renumber subsequent tests.
Update selective-mounting docs and add a security-fix summary with analysis/verification steps.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
`src/docker-manager.ts`	Ensures credential overlays are applied for the direct `$HOME` mount even in chroot mode, and keeps `/host$HOME` overlays.
`tests/integration/credential-hiding.test.ts`	Adds new chroot-mode regression tests for the direct-home bypass and renumbers later tests.
`docs/selective-mounting.md`	Documents the dual home mounts in chroot mode and the need to hide credentials at both paths.
`SECURITY_FIX_SUMMARY.md`	Adds a written vulnerability analysis, fix details, and verification guidance.

Comments suppressed due to low confidence (2)

tests/integration/credential-hiding.test.ts:228

This test claims the hosts.yml output “should be empty”, but the assertions only check that it doesn’t contain specific token strings. This can produce false positives (e.g., file missing, different token format, or other sensitive content still leaking). Consider asserting the output is exactly empty (as in Test 1/Test 8) or otherwise validating that a /dev/null overlay is in effect (e.g., size 0).

      expect(result).toSucceed();
      const output = result.stdout.trim();
      // Should be empty (no oauth_token visible via direct home mount)
      expect(output).not.toContain('oauth_token');
      expect(output).not.toContain('gho_');

src/docker-manager.ts:692

In chroot mode, effectiveHome is already set to getRealUserHome(). This block calls getRealUserHome() again; consider reusing effectiveHome (or passing userHome through) to avoid duplicated logic and any chance of inconsistency if getRealUserHome() behavior changes.

    const userHome = getRealUserHome();
    const chrootCredentialFiles = [

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

Copilot · 2026-02-12T04:37:43Z

SECURITY_FIX_SUMMARY.md

+1. **Direct mount at `$HOME`** (line 437 in `src/docker-manager.ts`)
+   - Purpose: Allow container environment to access workspace files
+   - Example: `/home/runner:/home/runner:rw`
+
+2. **Chroot mount at `/host$HOME`** (line 479 in `src/docker-manager.ts`)


This document references specific line numbers in src/docker-manager.ts for mounts and the fix. Those line numbers are likely to drift as the file changes, making the analysis harder to trust over time. Consider replacing exact line references with function names + a short code identifier (e.g., the relevant volume strings) or links to a specific commit/tag.

Suggested change

1. **Direct mount at `$HOME`** (line 437 in `src/docker-manager.ts`)

- Purpose: Allow container environment to access workspace files

- Example: `/home/runner:/home/runner:rw`

2. **Chroot mount at `/host$HOME`** (line 479 in `src/docker-manager.ts`)

1. **Direct mount at `$HOME`** (in `src/docker-manager.ts`, volume spec `/home/runner:/home/runner:rw`)

- Purpose: Allow container environment to access workspace files

- Example: `/home/runner:/home/runner:rw`

2. **Chroot mount at `/host$HOME`** (in `src/docker-manager.ts`, volume spec `/home/runner:/host/home/runner:rw`)

Copilot · 2026-02-12T04:37:44Z

tests/integration/credential-hiding.test.ts

+      // This test verifies that credentials are hidden at BOTH locations:
+      // 1. At /host${HOME} (chroot path)
+      // 2. At ${HOME} (direct mount)


The comment says this test verifies credentials are hidden at BOTH /host$HOME and $HOME, but this test only checks the direct $HOME path. Either update the comment to reflect what’s actually asserted here, or add a second assertion for the /host path (or explicitly point to Test 6 as covering it).

This issue also appears on line 224 of the same file.

Suggested change

// This test verifies that credentials are hidden at BOTH locations:

// 1. At /host${HOME} (chroot path)

// 2. At ${HOME} (direct mount)

// This test specifically verifies that credentials are hidden at the direct ${HOME} mount

// (the bypass path). The /host${HOME} chroot path is covered by

// "Test 6: Chroot mode hides credentials at /host paths".

Updated test comments to clarify that Test 8 only verifies the direct home path (the bypass path), with explicit reference to Test 6 for /host path coverage. Same fix applied to Test 9. Commit c873bbc

Copilot · 2026-02-12T04:37:44Z

src/docker-manager.ts

+    // - At ${effectiveHome} (direct mount for container environment)
+    // - At /host${userHome} (for chroot operations)


The comment uses “${userHome}” even though userHome isn’t defined until later, and the “${…}” notation can be confused with template-string interpolation. Consider rephrasing to plain text (e.g., “effective home path” and “/host + real user home”) to avoid confusion while keeping the security rationale.

This issue also appears on line 691 of the same file.

Suggested change

// - At ${effectiveHome} (direct mount for container environment)

// - At /host${userHome} (for chroot operations)

// - At the effective home path used inside the container environment

// - At /host plus the real user home path on the host (for chroot operations)

Replaced template string notation with plain text descriptions to avoid confusion with actual interpolation. Changed to "effective home path" and "/host plus the real user home path". Commit c873bbc

Copilot · 2026-02-12T04:37:44Z

docs/selective-mounting.md

+// IMPORTANT: Home directory is mounted at TWO locations in chroot mode
+// Credentials MUST be hidden at BOTH paths to prevent bypass attacks
+
+// 1. Direct home mount (for container environment)
+const directHomeCredentials = [
+  '/dev/null:/home/runner/.docker/config.json:ro',
+  '/dev/null:/home/runner/.npmrc:ro',
+  '/dev/null:/home/runner/.cargo/credentials:ro',
+  '/dev/null:/home/runner/.composer/auth.json:ro',
+  '/dev/null:/home/runner/.config/gh/hosts.yml:ro',


This documentation example hardcodes /home/runner paths for the hidden credentials. Since the code uses the real user home at runtime, consider using ${HOME} (or a placeholder like ) consistently here to avoid implying chroot-mode protection only applies to GitHub Actions runners.

See below for a potential fix:

`/dev/null:${HOME}/.docker/config.json:ro`, `/dev/null:${HOME}/.npmrc:ro`, `/dev/null:${HOME}/.cargo/credentials:ro`, `/dev/null:${HOME}/.composer/auth.json:ro`, `/dev/null:${HOME}/.config/gh/hosts.yml:ro`, `/dev/null:${HOME}/.ssh/id_rsa:ro`, `/dev/null:${HOME}/.ssh/id_ed25519:ro`, `/dev/null:${HOME}/.ssh/id_ecdsa:ro`, `/dev/null:${HOME}/.ssh/id_dsa:ro`, `/dev/null:${HOME}/.aws/credentials:ro`, `/dev/null:${HOME}/.aws/config:ro`, `/dev/null:${HOME}/.kube/config:ro`, `/dev/null:${HOME}/.azure/credentials:ro`, `/dev/null:${HOME}/.config/gcloud/credentials.db:ro`, ]; // 2. Chroot /host mount (for chroot operations) const chrootHiddenCredentials = [ `/dev/null:/host${HOME}/.docker/config.json:ro`, `/dev/null:/host${HOME}/.npmrc:ro`, `/dev/null:/host${HOME}/.cargo/credentials:ro`, `/dev/null:/host${HOME}/.composer/auth.json:ro`, `/dev/null:/host${HOME}/.config/gh/hosts.yml:ro`, `/dev/null:/host${HOME}/.ssh/id_rsa:ro`, `/dev/null:/host${HOME}/.ssh/id_ed25519:ro`, `/dev/null:/host${HOME}/.ssh/id_ecdsa:ro`, `/dev/null:/host${HOME}/.ssh/id_dsa:ro`, `/dev/null:/host${HOME}/.aws/credentials:ro`, `/dev/null:/host${HOME}/.aws/config:ro`, `/dev/null:/host${HOME}/.kube/config:ro`, `/dev/null:/host${HOME}/.azure/credentials:ro`, `/dev/null:/host${HOME}/.config/gcloud/credentials.db:ro`,

Changed hardcoded /home/runner paths to ${HOME} placeholders to be environment-agnostic and match runtime behavior. Commit c873bbc

github-actions · 2026-02-12T04:37:47Z

Deno Build Test Results

Project	Tests	Status
oak	1/1	✅ PASS
std	1/1	✅ PASS

Overall: ✅ PASS

All Deno tests completed successfully.

AI generated by Build Test Deno

github-actions · 2026-02-12T04:38:20Z

Java Build Test Results

Project	Compile	Tests	Status
gson	✅	1/1	PASS
caffeine	✅	1/1	PASS

Overall: PASS ✅

All Java projects compiled successfully and all tests passed.

AI generated by Build Test Java

github-actions · 2026-02-12T04:38:38Z

Chroot Version Comparison Test Results

Runtime	Host Version	Chroot Version	Match?
Python	3.12.12	3.12.3	❌ NO
Node.js	v24.13.0	v20.20.0	❌ NO
Go	go1.22.12	go1.22.12	✅ YES

Status: Some version mismatches detected. Chroot mode successfully uses host binaries, but the versions differ from what's installed in the container.

AI generated by Smoke Chroot

Mossaka · 2026-02-12T04:41:58Z

SECURITY_FIX_SUMMARY.md

@@ -0,0 +1,228 @@
+# Security Fix: Chroot Mode Credential Bypass Vulnerability


@claude[agent] please remove this file

Removed in commit c873bbc

Co-authored-by: Mossaka <[email protected]>

Initial plan

c92676b

Claude AI assigned Claude and lpcox Feb 11, 2026

Claude started work on behalf of lpcox February 11, 2026 15:30 View session

Claude AI and others added 3 commits February 11, 2026 15:33

fix(security): hide credentials at both mount paths in chroot mode

0871ec2

Co-authored-by: lpcox <[email protected]>

docs: update selective mounting docs with dual-mount protection

191ceaf

Co-authored-by: lpcox <[email protected]>

docs: add comprehensive security fix summary

fa2f7ea

Co-authored-by: lpcox <[email protected]>

Claude AI changed the title ~~[WIP] Analyze firewall's selective mounting vulnerability and propose fix~~ fix(security): hide credentials at both mount paths in chroot mode Feb 11, 2026

Claude AI requested a review from lpcox February 11, 2026 15:39

Claude finished work on behalf of lpcox February 11, 2026 15:39

Mossaka marked this pull request as ready for review February 12, 2026 04:33

Copilot AI review requested due to automatic review settings February 12, 2026 04:33

Copilot started reviewing on behalf of Mossaka February 12, 2026 04:33 View session

github-actions bot mentioned this pull request Feb 12, 2026

[agentics] No-Op Runs #676

Closed

github-actions bot added the smoke-claude label Feb 12, 2026

github-actions bot added the build-test-go label Feb 12, 2026

github-actions bot added build-test-bun smoke-copilot labels Feb 12, 2026

github-actions bot added the build-test-node label Feb 12, 2026

github-actions bot added the build-test-dotnet label Feb 12, 2026

github-actions bot added build-test-cpp build-test-rust labels Feb 12, 2026

Copilot AI reviewed Feb 12, 2026

View reviewed changes

github-actions bot added the build-test-deno label Feb 12, 2026

github-actions bot added the build-test-java label Feb 12, 2026

Mossaka reviewed Feb 12, 2026

View reviewed changes

Claude started work on behalf of Mossaka February 12, 2026 04:42 View session

docs: address PR feedback on comments and documentation

c873bbc

Co-authored-by: Mossaka <[email protected]>

Claude AI changed the title ~~fix(security): hide credentials at both mount paths in chroot mode~~ Addressing PR comments Feb 12, 2026

Claude AI requested a review from Mossaka February 12, 2026 04:44

Claude finished work on behalf of Mossaka February 12, 2026 04:44

		// - At ${effectiveHome} (direct mount for container environment)
		// - At /host${userHome} (for chroot operations)

		@@ -0,0 +1,228 @@
		# Security Fix: Chroot Mode Credential Bypass Vulnerability

Addressing PR comments #700

Are you sure you want to change the base?

Addressing PR comments #700

Conversation

Claude AI commented Feb 11, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

github-actions bot commented Feb 12, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

github-actions bot commented Feb 12, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

github-actions bot commented Feb 12, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

github-actions bot commented Feb 12, 2026

⚠️ Coverage Regression Detected

Overall Coverage

Uh oh!

github-actions bot commented Feb 12, 2026

Smoke Test Results

Uh oh!

github-actions bot commented Feb 12, 2026

Go Build Test Results

Uh oh!

github-actions bot commented Feb 12, 2026

Bun Build Test Results

Uh oh!

github-actions bot commented Feb 12, 2026

Uh oh!

github-actions bot commented Feb 12, 2026

Node.js Build Test Results ✅

Uh oh!

github-actions bot commented Feb 12, 2026

.NET Build Test Results

Uh oh!

github-actions bot commented Feb 12, 2026

Build Test: Rust ✅

Uh oh!

github-actions bot commented Feb 12, 2026

C++ Build Test Results

Uh oh!

Copilot AI left a comment

Choose a reason for hiding this comment

Pull request overview

Reviewed changes

Uh oh!

Copilot AI Feb 12, 2026

Choose a reason for hiding this comment

Uh oh!

Copilot AI Feb 12, 2026

Choose a reason for hiding this comment

Uh oh!

Claude AI Feb 12, 2026

Choose a reason for hiding this comment

Uh oh!

Copilot AI Feb 12, 2026

Choose a reason for hiding this comment

Uh oh!

Claude AI Feb 12, 2026

Choose a reason for hiding this comment

Uh oh!

Copilot AI Feb 12, 2026

Choose a reason for hiding this comment

Uh oh!

Claude AI Feb 12, 2026

Choose a reason for hiding this comment

Uh oh!

github-actions bot commented Feb 12, 2026

Deno Build Test Results

Uh oh!

github-actions bot commented Feb 12, 2026

Java Build Test Results

Uh oh!

github-actions bot commented Feb 12, 2026

Chroot Version Comparison Test Results

Uh oh!

Mossaka Feb 12, 2026

Choose a reason for hiding this comment

Claude AI commented Feb 11, 2026 •

edited

Loading

github-actions bot commented Feb 12, 2026 •

edited

Loading

github-actions bot commented Feb 12, 2026 •

edited

Loading

github-actions bot commented Feb 12, 2026 •

edited

Loading