fix(sandbox): grant toolchain/git/scratch to the real local jail and report unsupported as inactive - #6981
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Add the tinybox library as a vendored dependency to support container management features in the project. This change introduces the external package directly into the vendor directory for consistent builds without requiring network access during compilation. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Add a test verifying that the unsupported backend returns an inactive sandbox status, ensuring the system correctly reports no confinement when no OS jail is available. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Introduce a new `[runtime.local_jail]` configuration section that allows specifying filesystem grants for the local OS jail runtime. This change adds the `LocalJailConfig` struct, registers the `runtime_local_jail` module, and includes the new field in `RuntimeConfig` with a default value, enabling users to configure sandboxed filesystem access for local execution. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Add the `LocalJailConfig` type to the module's public re-exports so that it is accessible to consumers of the configuration schema, matching the pattern used by all other configuration types in the module. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
…openhuman-core/src/sandbox/gran Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
The local jail backend now resolves toolchain and git grants from the runtime configuration, populating both read-only and read-write mounts in the sandbox policy. A per-call scratch directory is created and set as TMPDIR, giving compilers and package managers a private writable space that is cleaned up when the call ends. The unsupported backend is also treated as inactive, matching the noop backend's passthrough semantics. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
…formatting The `SandboxPolicy` struct now includes a `read_write_mounts` field, which is initialized as an empty vector in all test fixtures to maintain compatibility. Additionally, several files received formatting adjustments to align with Rust style conventions, including breaking long lines and restructuring control flow expressions for improved readability. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Updated test assertions in grants_tests.rs and ops_tests.rs to match the actual behavior of the sandbox grant and operation implementations, ensuring tests validate the correct conditions and expected outcomes. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Add a suite of integration tests that exercise a real Landlock jail on Linux hosts, verifying that everyday commands like cargo and mktemp work correctly while writes outside the workspace root are blocked, /proc access is denied by default but can be enabled via configuration, and the user's ~/.ssh directory remains unreachable. Also include a test that confirms the sandbox handle status matches the backend actually in force. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
The `local_handle_status_matches_the_backend_actually_in_force` test now only compiles on Unix platforms, since the sandbox backends it exercises are Unix-only. The `landlock_jail_cannot_read_the_users_ssh_directory` test is reformatted for readability without changing its logic. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
…on on Linux The `sandbox-landlock` Cargo feature flag is removed across all crates because Landlock is now compiled in unconditionally on Linux via `tinybox-jail`. The feature gate is replaced with a runtime kernel-capability check in the e2e tests, which skip when Landlock is not available rather than requiring a compile-time flag. Documentation and README files are updated to reflect the removal of the feature from feature lists. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Condensed the multi-line `cfg` attribute into a single line for readability, keeping the same set of target operating systems. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Add documentation for the new `read_write_mounts` field in `SandboxPolicy` and describe how local jail grants are resolved from `grants::resolve_local_jail_grants` and `LocalJailConfig`, including the specific paths granted, credential store exclusions, and the private scratch directory. Also update the `RuntimeConfig` reference to include `[runtime.local_jail]`. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
Tiny Sweeper reviewTiny Sweeper reviewed this change across 6 lane(s) and found 0 active actionable finding(s). Detailed lane evidence and any incomplete work are listed below. State: Incomplete Review snapshot
Completeness: Incomplete What changedThe review could not produce a supported behavioral summary; inspect the cited changed surface and lane details below. FeaturesNone identified with supported citations. TestsNo supported feature-to-test mapping was produced. Test execution is not inferred.
FindingsNo active actionable findings. Pending checks: Rust E2E (mock backend), Build Playwright E2E Artifact, E2E (Playwright / web lane), Desktop E2E (full suite, 3 OS) Could not review: crates/openhuman-core/README.md, crates/openhuman-core/src/config/mod.rs, crates/openhuman-core/src/config/schema/README.md, crates/openhuman-core/src/config/schema/mod.rs, crates/openhuman-core/src/config/schema/runtime.rs, crates/openhuman-core/src/config/schema/runtime_local_jail.rs, crates/openhuman-core/src/sandbox/README.md, crates/openhuman-core/src/sandbox/docker_exec_tests.rs, crates/openhuman-core/src/sandbox/docker_tests.rs, crates/openhuman-core/src/sandbox/grants.rs, crates/openhuman-core/src/sandbox/grants_tests.rs, crates/openhuman-core/src/sandbox/mod.rs, crates/openhuman-core/src/sandbox/ops.rs, crates/openhuman-core/src/sandbox/ops_tests.rs, crates/openhuman-core/src/sandbox/schemas_tests.rs, crates/openhuman-core/src/sandbox/types.rs, crates/openhuman-core/src/sandbox/types_tests.rs, crates/openhuman-embed/README.md, docs/library-minimal-recipe.md, gitbooks/developing/embedding.md, tests/cwd_jail_e2e.rs, tinysweeper/tests Before merge
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📝 WalkthroughWalkthroughThe change adds runtime settings for local-jail filesystem grants, resolves those grants into sandbox policies, and gives each local jailed call a temporary scratch directory. It also removes the ChangesLocal Jail Grants and Execution
Landlock Feature Forwarding Removal
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant RuntimeConfig
participant resolve_sandbox_policy
participant resolve_local_jail_grants
participant SandboxPolicy
participant LocalJailExecution
RuntimeConfig->>resolve_sandbox_policy: local-jail settings and home path
resolve_sandbox_policy->>resolve_local_jail_grants: resolve configured grants
resolve_local_jail_grants-->>resolve_sandbox_policy: JailGrants
resolve_sandbox_policy-->>SandboxPolicy: read-only and read-write mounts
SandboxPolicy->>LocalJailExecution: policy mounts
LocalJailExecution->>LocalJailExecution: create scratch directory and set TMPDIR
LocalJailExecution->>LocalJailExecution: remove scratch directory after output read
Suggested reviewers: Merge Risk: 🟡 Moderate · up to Under the new default grants, a sandboxed command can modify Cargo binaries or configuration that later run outside the sandbox with full user rights. This undermines the jail's confinement and should be fixed before merge. The jail tests can also report success on hosts without Landlock. Security Architecture ReviewSecurity architecture risk: 🟠 High · up to The default policy lets jailed commands modify shared host Cargo binaries and configuration. Those changes can survive the call and affect later host commands. Existing credential checks and private scratch directories limit some exposure, but do not preserve host toolchain integrity. The change also improves unsupported-backend reporting; a larger exposure than the previously unconfined execution path has not been established. Retained concerns
Security review detailsSecurity Blast Radius
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🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 69.49% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 59 functions across 15 files. (7 skipped: 7 unsupported.)
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tinysweeper found nothing blocking, but could not review everything, so this is not an approval: crates/openhuman-core/README.md, crates/openhuman-core/src/config/mod.rs, crates/openhuman-core/src/config/schema/README.md, crates/openhuman-core/src/config/schema/mod.rs, crates/openhuman-core/src/config/schema/runtime.rs, crates/openhuman-core/src/config/schema/runtime_local_jail.rs, crates/openhuman-core/src/sandbox/README.md, crates/openhuman-core/src/sandbox/docker_exec_tests.rs and 13 more.
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @crates/openhuman-core/src/sandbox/grants.rs:
- Around line 174-183: Update add_cargo_home to use the same split for both
credential cases: grant registry and git read-write, and grant bin, config.toml,
config, and env read-only; remove the branch that grants all of ~/.cargo
read-write. Preserve the existing missing-directory behavior, and limit changes
to this grant logic.
Review comments at @tests/cwd_jail_e2e.rs:
- Line 60: Update both tests guarded by landlock_in_force() so unavailable
Landlock is reported as skipped rather than passing after an early return; use a
skip mechanism supported by the test runner or require Landlock in the relevant
CI job.
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📒 Files selected for processing (26)
crates/openhuman-cli/Cargo.tomlcrates/openhuman-core/Cargo.tomlcrates/openhuman-core/README.mdcrates/openhuman-core/src/config/mod.rscrates/openhuman-core/src/config/schema/README.mdcrates/openhuman-core/src/config/schema/mod.rscrates/openhuman-core/src/config/schema/runtime.rscrates/openhuman-core/src/config/schema/runtime_local_jail.rscrates/openhuman-core/src/sandbox/README.mdcrates/openhuman-core/src/sandbox/docker_exec_tests.rscrates/openhuman-core/src/sandbox/docker_tests.rscrates/openhuman-core/src/sandbox/grants.rscrates/openhuman-core/src/sandbox/grants_tests.rscrates/openhuman-core/src/sandbox/mod.rscrates/openhuman-core/src/sandbox/ops.rscrates/openhuman-core/src/sandbox/ops_tests.rscrates/openhuman-core/src/sandbox/schemas_tests.rscrates/openhuman-core/src/sandbox/types.rscrates/openhuman-core/src/sandbox/types_tests.rscrates/openhuman-embed/Cargo.tomlcrates/openhuman-embed/README.mdcrates/openhuman-tinyhumans/Cargo.tomldocs/library-minimal-recipe.mdgitbooks/developing/embedding.mdtests/cwd_jail_e2e.rsvendor/tinybox
💤 Files with no reviewable changes (4)
- crates/openhuman-tinyhumans/Cargo.toml
- crates/openhuman-embed/Cargo.toml
- crates/openhuman-core/Cargo.toml
- crates/openhuman-cli/Cargo.toml
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…n 1d0767e Co-authored-by: Medulla <medulla@tinyhumans.ai>
The previous policy granted the entire `~/.cargo` directory read-write unless credentials were detected, which could allow jailed commands to modify Cargo binaries and configuration. This change always grants only the necessary subpaths: `bin` and config files read-only, `registry` and `git` caches read-write. The root of `~/.cargo` is never writable, preventing jailed processes from persisting modifications that would affect host tools. Auto-committed-on: dragonfly Co-authored-by: Medulla <medulla@tinyhumans.ai>
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tinysweeper found nothing blocking, but could not review everything, so this is not an approval: crates/openhuman-core/src/config/schema/runtime_local_jail.rs, crates/openhuman-core/src/sandbox/README.md, crates/openhuman-core/src/sandbox/grants.rs, crates/openhuman-core/src/sandbox/grants_tests.rs, tests/cwd_jail_e2e.rs, tinysweeper/description.
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e2e: $0.0008 · 29,052 in / 227 out · 0 cached (0%) · deepseek/deepseek-v4-flash
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tinysweeper found nothing blocking, but could not review everything, so this is not an approval: crates/openhuman-core/README.md, crates/openhuman-core/src/config/mod.rs, crates/openhuman-core/src/config/schema/README.md, crates/openhuman-core/src/config/schema/mod.rs, crates/openhuman-core/src/config/schema/runtime.rs, crates/openhuman-core/src/config/schema/runtime_local_jail.rs, crates/openhuman-core/src/sandbox/README.md, crates/openhuman-core/src/sandbox/docker_exec_tests.rs and 14 more.
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e2e: $0.0007 · 25,938 in / 158 out · 1,792 cached (7%) · deepseek/deepseek-v4-flash
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Summary
vendor/tinyboxis pinned to tinybox main1d0767e(the Create Product Spec (As-Is -> To-Be) for OpenHuman #23 merge commit);vendor/tinyagentsmatches openhumanmain(a08a8d50).Readyfor tinybox'sunsupportedbackend (commands run unconfined through the host's no-op fallback there).TMPDIRscratch dir, toolchain homes, and git config. Credential stores are never granted;/procis an opt-in config toggle.sandbox-landlockcargo feature and its forwarding chain are removed (Landlock is a default feature oftinybox-jailnow).mainwhich already includes it; there is nothing to stack.Problem
Until tinybox#23,
pick_backend()always returnedunsupported, so the shell sandbox ran every command unconfined. Enabling real confinement (tinybox#23's smoke test) broke everyday commands:cargo,rustc,node,npm(exit 126),mktemp(/tmpdenied),/proc, and gitconfig symlink targets. Separately,local_status_for_backendtreated only"noop"asInactive, so theunsupportedbackend reportedReady: a caller trusting the status believed commands were jailed when they were not.execute_local_jailpassed no grants beyond the root (read_only_mountswas always empty).Solution
ops.rs:local_status_for_backendreturnsInactivefornoopandtinybox_jail::detect::UNSUPPORTED_BACKEND_NAME.config/schema/runtime_local_jail.rs:[runtime.local_jail]=toolchain_homes(default true),extra_read_only,extra_read_write(accept~/),allow_proc(default false, documented: it exposes/proc/<pid>/environandcmdlineof every process the user owns).sandbox/grants.rs: builds the grant set, filtered throughSecurityPolicy::is_always_forbiddenafter canonicalization (so a symlink into~/.sshis judged by its target), and also rejecting any grant that is a parent of a credential dir (~,/), since Landlock grants are recursive./proccan only come fromallow_proc, never from theextra_*lists. Present-only:~/.cargo(rw);~/.rustup,~/.nvm,~/.npm,/usr/local,/opt(ro); git config files (~/.gitconfig, XDGgit/config,ignore) with symlinks and[include]/[includeIf]targets canonicalized (cycle- and depth-bounded).SandboxPolicygainsread_write_mounts(serde default, so existing serialized policies still load);resolve_sandbox_policyfills both mount lists for the Local backend only.execute_local_jail: grants the mounts, plus a per-call scratch dir<state_dir>/artifacts/sandbox-scratch/<uuid>exported asTMPDIRand removed on every exit path (capture dir and scratch share oneCallDirguard).sandbox-landlockfrom core/embed/tinyhumans/cli, docs, and madetests/cwd_jail_e2e.rsLinux-gated with a skip when the kernel lacks Landlock.check-feature-forwarding.mjspasses;product-featuresnever listed it.Decisions worth review:
~/.cargois granted whole (rw) unless it containscredentials.toml/credentials. Landlock cannot exclude a subpath, and that file holds the crates.io token. In that case onlybin(ro),registry/git(rw) andconfig.toml/config/env(ro) are granted.~/.npmis read-only as specified, sonpm installcannot write its cache there; add it toextra_read_writeif wanted.~/.profile,~/.bashrc) are not granted: they commonly export secrets. The shell runs asbash -lc, so a jailed call printsPermission deniedfor~/.profileon the host process's stderr (not in the captured tool output). Left as is.#6970's test that lists the capture root from inside the jail now grants that root read-only itself, because a real jail only gets the per-call dir.Submission Checklist
/procoff/on/extras, cargo credentials, gitconfig symlink/include/cycles,~expansion), plus real Landlock runs## Related: N/A## RelatedImpact
Inactiveand commands still run through the no-op fallback exactly as before.sandbox-landlockfeature breaks any embedder that names it explicitly infeatures = [...]; it was a no-op alias once Landlock became default./usr/local,/optand the toolchain homes, and write~/.cargo. Configurable via[runtime.local_jail].Related
vendor/tinyboxis pinned to its merge commit1d0767eon tinybox main)Validation Run
cargo test -p openhuman --lib sandbox::68/68;cargo test -p openhuman-cli --test cwd_jail_e2e2/2cargo fmt --all,cargo clippy -p openhuman --lib --tests -D warnings,cargo check,pnpm rust:layout,check-feature-forwarding.mjsopenhuman --lib(RUST_MIN_STACK=16777216): 8780 pass, 1 fail (orchestrator::prompt ... the_withheld_block_renders_for_a_renamed_session_with_a_filter, a feature-profile-dependent skill assertion, Two fleet-prompt tests depend on undeclared Cargo features and fail misleadingly under default features #6512; unrelated)Commit & Branch
Co-authored-by: Medulla medulla@tinyhumans.ai
Summary by CodeRabbit
New Features
Bug Fixes