[lib-audit] rollback.sh sources a data file as bash: RCE under sudo (tsk-rw62vx)

[jaylfc]

BASE: exec/tsk-wrqx7t
Supersedes #2762

CARD TITLE (intent, not commit subject): agent versioning (#2762 chain): git repo at /root with a DENYLIST .gitignore commits the agent's LiteLLM key (.hermes/config.yaml, .openclaw/env) and multi-GB caches on the first git add -A - switch to an ALLOWLIST of state paths + fold the 5 CR findings

Autonomous build of board card tsk-xa76qz. Cut from exec/tsk-wrqx7t at da5956d67, targets dev as every card in this chain has. Keeps the branch's content and intent (routes, committer, deployer wiring, tests); changes the versioning scope and folds the findings.

What changed

The class defect: allowlist, not a longer denylist

_GITIGNORE_CONTENTS was 19 deny patterns over a repo whose root is the whole agent home. It could never be complete — the deployer itself writes /root/.hermes/config.yaml (model.api_key = the per-agent LiteLLM key, install_hermes.sh:68-81) and /root/.openclaw/env (TAOS_BRIDGE_TOKEN + OPENAI_API_KEY), and neither matched a pattern.

The scope is now generated from one constant:

_STATE_PATHS: tuple[str, ...] = (
    ".gitignore",
    "AGENTS.md",
    "workspace/",
    "memory/",
    *sorted(_home_relative(p) for p in AGENTS_MD_PATHS.values()),
)

AGENTS_MD_PATHS moved from deployer.py into agent_git.py (deployer re-exports the name it has always exposed, so from tinyagentos.deployer import AGENTS_MD_PATHS still works) — the list is derived, not duplicated, so adding a framework adds a state path and never a secret pattern. _build_gitignore() renders it:

# taOS agent state repo — ALLOWLIST: everything under the agent home
# is ignored and only the paths re-included below are versioned.
# Generated from _STATE_PATHS in tinyagentos/agent_git.py — edit there,
# a deploy overwrites this file.
*
!/.gitignore
!/AGENTS.md
!/workspace/
!/workspace/**
!/memory/
!/memory/**
!/.hermes/
!/.hermes/AGENTS.md
!/.openclaw/
!/.openclaw/AGENTS.md

Each parent directory of a re-included file is re-included too, because git will not re-include a file whose parent directory is excluded. .ssh/, .taos/trace/ (the bind mount) and .taos/committer.log fall out naturally under *.

Framework config is NOT re-included. .hermes/config.yaml carries the LiteLLM key today (Hermes' credential pool reads it from there), so the file stays out of history entirely rather than being versioned in redacted form; install_hermes.sh is untouched. If persona/memory settings inside config.yaml ever need versioning, the split has to happen in the installer first.

Timeout (consequence 2). git add -A stays. The allowlist is what makes it safe: git descends into workspace/, memory/, .hermes/ and .openclaw/ only, and never walks .cache/, .local/ or .venv/ — the trees that made a 60 s timeout a real deploy-time failure on a Pi. The initial commit additionally gets its own budget (_INITIAL_COMMIT_TIMEOUT = 300) so an image shipping a populated workspace/ on slow eMMC cannot silently land on versioning=False.

Revert semantics (consequence 3) follow the same scope: git reset --hard can now only rewind workspace/memory/AGENTS.md, not .bash_history, .config/* or framework binaries under .local/bin.

Findings

1. agent_git.py:34 — .env.local not ignored → FOLDED (subsumed). No .env.* pattern was added; the path is out of scope because everything is, and test_secret_and_bulk_paths_are_not_versioned[.env.local] covers it alongside 19 sibling paths.

2. agent_git.py:104 — unknown revision detected only via bad revision → FOLDED. _UNKNOWN_REV_MARKERS now matches bad revision, unknown revision, ambiguous argument and bad object through one _raise_unknown_revision_or_unreachable() helper used by both git_rev_parse and git_diff, so git show on a missing sha is 404, not 409. A genuine exec failure (Error: Instance is not running) still raises ContainerUnreachableError — asserted by a control test.

3. agent_git.py:164 — "include ignored untracked files in the dirty-tree check" → REFUTED, not folded. Under the allowlist, ignored paths are by design outside the versioned state. The .gitignore above ignores * and re-includes four roots, so on any live agent .cache/, .local/, .venv/, .bash_history and the framework install always exist and are always ignored. A dirty check that counted ignored files would therefore refuse every revert, forever — git status --porcelain --ignored on a real agent home is never empty. And the reset contract makes the alternative worse: git reset --hard deletes tracked files it rewinds, so bringing ignored paths into scope would mean a "revert agent memory" click deleting the framework install. The check stays on tracked state, which is exactly the set the revert can restore. The out unused-variable warning at the old line 158 is gone — out is now read in the failure path.

4. agent_git.py:150 + routes/agent_versions.py:185-188 — noop decided outside the flock → FOLDED. The route no longer compares against a HEAD it read itself; it resolves the sha (404s an unknown one) and always calls git_revert, which makes the whole decision inside the lock:

   head=$(git -C /root rev-parse HEAD) || exit 1;
   test "$head" = <sha> && exit 3;
   dirty=$(git -C /root status --porcelain) || exit 1;
   test -n "$dirty" && exit 2;
   git -C /root reset --hard <sha>
   

   Exit 3 → noop, exit 2 → DirtyTreeError (409), other non-zero → ContainerUnreachableError (409, not the 404 a bare RuntimeError would have mapped to). Regression test commits between the sha resolution and the revert and asserts reverted + the tree actually back on the requested sha.

5. deployer.py:749, 830-843 — committer failures left versioning=True → FOLDED. Missing committer script, failed script push and failed nohup launch now all raise into the enclosing handler that already sets versioning=False, versioning_error and appends committer_failed. The systemd-unit-not-active branch no longer appends committer_failed prematurely — it falls through to the nohup fallback, and only that fallback's failure is terminal. The script path is a module constant (_COMMITTER_SCRIPT) so the missing-file branch is reachable from a test.

RED FIRST (pasted)

New/changed tests run at da5956d67 (the branch head this card folds), i.e. with the old _GITIGNORE_CONTENTS, the old revert and the old deployer:

$ .venv/bin/python -m pytest tests/test_agent_git.py tests/test_routes_agent_versions.py tests/test_deployer.py -q -p no:cacheprovider

            result = await deploy_agent(req)
            assert result["success"] is True
            assert "committer_failed" in result["steps"]
>           assert result["versioning"] is False
E           assert True is False

tests/test_deployer.py:1595: AssertionError
------------------------------ Captured log call -------------------------------
WARNING  tinyagentos.deployer:deployer.py:833 Deploy test: nohup committer failed (rc=1): bash: python3: command not found
=========================== short test summary info ============================
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.hermes/config.yaml]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.openclaw/env]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.openclaw/openclaw.json]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.env.local]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.netrc]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.git-credentials]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.npmrc]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.config/gh/hosts.yml]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.kube/config]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.bash_history]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.cache/pip/wheel.whl]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.local/share/uv/tool.bin]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.venv/lib/site.py]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.npm/_cacache/index]
FAILED tests/test_agent_git.py::test_secret_and_bulk_paths_are_not_versioned[.taos/committer.log]
FAILED tests/test_agent_git.py::test_unknown_framework_config_is_excluded_by_default
FAILED tests/test_agent_git.py::test_versioned_scope_is_a_single_constant - A...
FAILED tests/test_agent_git.py::TestUnknownRevisionDiagnostics::test_git_diff_reports_unknown_revision[fatal: ambiguous argument 'deadbeef': unknown revision or path not in the working tree.]
FAILED tests/test_agent_git.py::TestUnknownRevisionDiagnostics::test_git_diff_reports_unknown_revision[fatal: bad object deadbeef]
FAILED tests/test_agent_git.py::TestUnknownRevisionDiagnostics::test_git_rev_parse_reports_unknown_revision[fatal: ambiguous argument 'deadbeef': unknown revision or path not in the working tree.]
FAILED tests/test_routes_agent_versions.py::TestAgentVersionsRoutes::test_revert_wins_a_commit_racing_the_sha_resolution
FAILED tests/test_deployer.py::TestGitInitAndCommitter::test_missing_committer_script_disables_versioning
FAILED tests/test_deployer.py::TestGitInitAndCommitter::test_committer_push_failure_disables_versioning
FAILED tests/test_deployer.py::TestGitInitAndCommitter::test_nohup_committer_failure_disables_versioning
24 failed, 102 passed in 162.49s (0:02:42)

The 15 failing test_secret_and_bulk_paths_are_not_versioned[...] rows are exactly the card's COMMITTED table, one assertion per path (path granularity, not one coarse "no .env.local" check). The rows the card listed as already IGNORED — .ssh/id_ed25519, .env, .hermes/.env, .aws/credentials, .taos/trace/events.jsonl — passed before and after, and the six test_state_paths_are_versioned[...] rows passed before and after too, so the fix is not moving the goalposts: the same suite that fails on the old scope passes on the new one without either half flipping.

GREEN

$ .venv/bin/python -m pytest tests/test_agent_git.py tests/test_routes_agent_versions.py tests/test_agent_committer.py -q -p no:cacheprovider
................................................................         [100%]
64 passed in 207.64s (0:03:27)

$ .venv/bin/python -m pytest tests/test_deployer.py -q -p no:cacheprovider
..................................................................       [100%]
66 passed in 79.95s (0:01:19)

Also run: python scripts/check_doc_gate.py diff-gate --base origin/dev → doc-gate: clean; python scripts/check_secret_ignores.py → secret-ignores-guard: clean.

Rendered allowlist verified directly against git (git check-ignore semantics via git add -A + git ls-files in a temp repo built from the module's real _GITIGNORE_CONTENTS) — that is what tests/test_agent_git.py does, so the property is asserted in CI rather than in a one-off shell session.

Docs

• tinyagentos/agent_git.py module docstring — states that the scope is an allowlist and why (repo root is the home dir + git add -A).
• tinyagentos/routes/agent_versions.py module docstring — new Scope section: what /diff can serve and what /revert can roll back, i.e. that framework config, shell history and caches are not in history.
• tinyagentos/deployer.py step 4b comment — allowlist wording replacing "a .gitignore excludes secrets and bulk artefacts".
• changelog.d/tsk-xa76qz-agent-versioning-allowlist.md (Security + Fixed).
• No user- or agent-facing doc describes agent state versioning: the feature is API-only and undocumented across this whole chain (docs/agent-manual/*, docs/agent-coordination.md, README and the desktop app have no versions/revert surface — grepped). Commit carries a Docs-Reviewed: trailer saying so; check_doc_gate.py reports clean.

---

Kilo review fold (head 76b86bdce)

All six accepted; none refuted. Two of them found a defect in my own tests as well, noted below.

#	Item	Verdict
1	scripts/rollback.sh:59 — sha {7,40} → full object name	fixed
2	tinyagentos/rollback.py:29 — same on the Python end	fixed
3	scripts/rollback.sh:64 — branch regex → git-check-ref-format rules	fixed (delegated to git check-ref-format, not a bigger regex)
4	tinyagentos/rollback.py:84 — Python reader validates prev_branch too	fixed
5	tests/test_rollback.py:18 — brittle brace-counting extractor	fixed (anchored slice; the refutation condition did not hold)
6	tests/test_rollback_script_parse.py:85 — assert the exit path, not just the sentinels	fixed

On (1)/(2) — accepted, with one deliberate widening

The rule is now "a full object name", implemented as ^(?:[0-9a-fA-F]{40}|[0-9a-fA-F]{64})$
rather than exactly 40. git rev-parse HEAD returns 64 hex in a --object-format=sha256
checkout, and pinning to 40 would make such an install silently record nothing at all. 64 is
still a full name, so it cannot be the truncated-or-forged prefix the review is aimed at, and
every abbreviation the review named is rejected either way.

On (3) — accepted, implemented by asking git rather than by a longer regex

Enumerating the grammar (.., leading ., trailing .lock, @{, control chars, space,
~^:?*[\, //, trailing .) in a shell regex is exactly the kind of check that drifts, so the
shell now calls git check-ref-format "refs/heads/$1" — the authority the review cites. One rule
is kept on top of it, because git does not provide it: git accepts refs/heads/--force as a
perfectly valid ref, so the leading-dash guard (the argv-option hazard) has to be ours. Verified
against git directly rather than assumed:

[main]           -> VALID      [feat/..evil]    -> INVALID
[-foo]           -> VALID      [.hidden]        -> INVALID
[@]              -> VALID      [x.lock]         -> INVALID

On (4) — accepted, and it fixes an end-to-end disagreement

read_rollback_target now blanks an unsafe branch and keeps the commit, which is what the shell
does; previously it returned the bad name verbatim. Because the Python side is a reimplementation
rather than a call to git, test_ref_safe_matches_git_check_ref_format pins it to
git check-ref-format's own answers over a 31-name table, and
test_shell_ref_safe_matches_python asks the script's real ref_safe() the same 31 questions.
That is what makes "both ends agree" a fact rather than a claim.

On (5) — accepted; the refutation condition did not hold

The extractor was anchored at the start (line.startswith("record_field()")) but not at a
column-0 } — it counted brace depth, and the body contains ${val:1:${#val}-2} and
${val//...}. Those happen to balance, so it worked by luck; a ${var:-default} added later
would still balance, but a brace inside a string would not. Replaced with a slice from the
name() line to the first following line that is exactly }, done in Python (no sed/process
substitution needed) — the same anchoring the review asked for.

RED FIRST (fold)

Each accepted change has a test that fails at the previous head d4dadd94d.

(1)/(2) abbreviated sha, and (3) unsafe branch — tests/test_rollback_script_parse.py:

$ .venv/bin/python -m pytest tests/test_rollback_script_parse.py -q -p no:cacheprovider --tb=line
/…/tests/test_rollback_script_parse.py:191: AssertionError: expected the recovery tag d9126a702693, not the abbreviated 6237198; output:
E     [rollback] recorded target: branch='main' commit='6237198'
E     [rollback] restoring branch 'main' at 6237198
E     [rollback] rolled back to main @ 6237198
E   assert '623719886769...b6cf397fde17f' == 'd9126a702693...71dc908f99ce9'

/…/tests/test_rollback_script_parse.py:212: AssertionError:
E     [rollback] recorded target: branch='feat/..evil' commit='35350822f84e'
E     [rollback] restoring branch 'feat/..evil' at 35350822f84e
E     fatal: 'feat/..evil' is not a valid branch name
E     hint: See `man git check-ref-format`
E   assert 128 == 0
=========================== short test summary info ============================
FAILED tests/test_rollback_script_parse.py::test_abbreviated_sha_falls_back_to_recovery_tag
FAILED tests/test_rollback_script_parse.py::test_unsafe_branch_restores_the_commit_detached
2 failed, 7 passed in 6.23s

The second one is the concrete cost of the loose regex: git checkout -B 'feat/..evil' fails,
the --force retry fails too, and set -e aborts — 128, no rollback at all, rather than a
detached checkout at the recorded commit.

(2)/(4) the Python end — tests/test_rollback.py:

$ .venv/bin/python -m pytest tests/test_rollback.py -q -p no:cacheprovider --tb=short
___________________ ERROR collecting tests/test_rollback.py ____________________
tests/test_rollback.py:6: in <module>
    from tinyagentos.rollback import (
E   ImportError: cannot import name '_ref_safe' from 'tinyagentos.rollback' (/…/tinyagentos/rollback.py)
=========================== short test summary info ============================
ERROR tests/test_rollback.py
1 error in 2.70s

GREEN (fold)

$ .venv/bin/python -m pytest tests/test_rollback.py tests/test_rollback_script_parse.py -q -p no:cacheprovider
86 passed in 11.06s

$ .venv/bin/python -m pytest tests/ -q -p no:cacheprovider -k "rollback or update_runner or auto_update"
137 passed, 12782 deselected, 11 warnings in 123.56s

$ bash -n scripts/rollback.sh
syntax ok

$ .venv/bin/python scripts/check_doc_gate.py diff-gate --staged && .venv/bin/python scripts/check_doc_gate.py invariants
doc-gate: clean
doc-gate: clean

Two defects the review flushed out of my own tests

Both were found while writing the reds, and both meant a test that could not have failed:

• test_abbreviated_sha_falls_back_to_recovery_tag passed against the unfixed script. The fixture
  had two commits, so the recovery tag and HEAD~1 were the same sha — every "which route did
  it take" assertion in the module was decided by one value. The fixture now has three commits, so
  the recorded target and the tag are distinguishable; the test then went red as intended.
• test_dash_leading_branch_is_not_passed_to_git asserted git branch --list --force == "", and
  --force was swallowed as an option, so it printed every branch. It now asks
  git rev-parse --verify refs/heads/--force. (This one is a guard, not a red: the previous
  charset regex already rejected a leading dash.)

Changelog fragment updated to cover the tightened rules.

Removes-Intentionally: test_file_is_shell_sourceable

Summary by CodeRabbit

• Bug Fixes
  • Rollback records are now read as data rather than executed as shell commands.
  • Invalid, truncated, or corrupted rollback records now fall back to the newest recovery point.
  • Recorded commits are restored even when the associated branch name is unsafe or unavailable.
  • Rollback targets now require complete, valid commit identifiers, including supported SHA-256 identifiers.
  • Explicit rollback targets continue to work as before.
  • Unsafe branch names no longer interrupt commit restoration or become command-line options.

---

CodeRabbit fold (head 1817efe71)

One item, accepted. Kilo did not re-review after the previous fold — all six of its comments are
timestamped 2026-09-05T00:04:53Z, i.e. against the pre-fold head, and every one of them is
already addressed above; there is no new Kilo item to disposition.

Reviewer	Item	Verdict
CodeRabbit	tinyagentos/rollback.py:79 — _SHA_RE.match() accepts a trailing newline; use fullmatch()	fixed, both call sites
Kilo	(no new comments on 76b86bdce)	n/a

Why this one mattered more than "Minor"

Python's $ also matches just before one final newline, so .match() accepted <40 hex>\n.
The shell mirror does not — checked rather than assumed:

$ sha_safe(){ [[ "$1" =~ ^[0-9a-fA-F]{40}$ || "$1" =~ ^[0-9a-fA-F]{64}$ ]]; }
plain     -> ACCEPTED
newline   -> rejected
space     -> rejected
leading   -> rejected

So the two ends disagreed in the damaging direction: the writer would record a value
scripts/rollback.sh then refuses, leaving the install with a rollback target that silently
does not work. That is precisely the failure class this card exists to close, so it is fixed at
both call sites (the writer's validation and the reader's) rather than only the flagged line. The
reader's input is already whitespace-stripped by the line parser, so that half is defence in
depth; the two must not diverge on a shared constant. The ^...$ anchors stay, so a future
.search() cannot reopen the hole from the other side.

scripts/rollback.sh needed no change. Swept for siblings: _SHA_RE has exactly two call sites,
both now fullmatch, and tinyagentos/update_runner.py has no pattern of its own.

RED FIRST (fold)

At head 76b86bdce:

$ .venv/bin/python -m pytest tests/test_rollback.py -q -p no:cacheprovider --tb=short -k "whitespace or sha_safe_matches"
F......F....                                                             [100%]
=================================== FAILURES ===================================
_ test_record_rejects_a_sha_with_surrounding_whitespace[a1b2c3d4e5f60718293a4b5c6d7e8f9012345678\n] _
tests/test_rollback.py:149: in test_record_rejects_a_sha_with_surrounding_whitespace
    with pytest.raises(ValueError):
         ^^^^^^^^^^^^^^^^^^^^^^^^^
E   Failed: DID NOT RAISE ValueError
_ test_shell_sha_safe_matches_the_writer[a1b2c3d4e5f60718293a4b5c6d7e8f9012345678\n] _
tests/test_rollback.py:169: in test_shell_sha_safe_matches_the_writer
    assert _shell_sha_safe(sha) == writable, (
E   AssertionError: shell sha_safe('a1b2c3d4e5f60718293a4b5c6d7e8f9012345678\n') disagrees with the writer
E   assert False == True
E    +  where False = _shell_sha_safe('a1b2c3d4e5f60718293a4b5c6d7e8f9012345678\n')
=========================== short test summary info ============================
FAILED tests/test_rollback.py::test_record_rejects_a_sha_with_surrounding_whitespace[a1b2c3d4e5f60718293a4b5c6d7e8f9012345678\n]
FAILED tests/test_rollback.py::test_shell_sha_safe_matches_the_writer[a1b2c3d4e5f60718293a4b5c6d7e8f9012345678\n]
2 failed, 10 passed, 77 deselected in 1.09s

The second failure is the point: it states the disagreement directly — the shell says False, the
writer says True, on the same value. Only the \n case is red; the space/tab/\r\n cases in the
same table already passed and stay as guards.

GREEN (fold)

$ .venv/bin/python -m pytest tests/test_rollback.py tests/test_rollback_script_parse.py -q -p no:cacheprovider
98 passed in 2.91s

$ .venv/bin/python -m pytest tests/ -q -p no:cacheprovider -k "rollback or update_runner or auto_update"
149 passed, 12782 deselected, 11 warnings in 29.98s

$ bash -n scripts/rollback.sh
syntax ok

$ .venv/bin/python scripts/check_doc_gate.py diff-gate --staged && .venv/bin/python scripts/check_doc_gate.py invariants
doc-gate: clean
doc-gate: clean

Note on the deleted-symbols-gate waiver

The gate matches waived symbols by exact path:name (check_deleted_symbols.py: if symbol in waived_set), so the bare-name form Removes-Intentionally: test_file_is_shell_sourceable does not
match and the gate stayed red. The fully-qualified trailer is restored below; the bare form is left
in place too, since an unmatched entry is harmless.

Removes-Intentionally: tests/test_rollback.py:test_file_is_shell_sourceable

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📥 Commits

Reviewing files that changed from the base of the PR and between 1817efe and b1fe4f2.

📒 Files selected for processing (3)

• changelog.d/tsk-rw62vx-rollback-record-parsed-not-sourced.md
• scripts/rollback.sh
• tests/test_rollback.py

📝 Walkthrough

Walkthrough

The rollback record format is now data-only. Python validates records before writing and reading them. The shell script parses records without sourcing them, validates commits and branches, and falls back to recovery tags for unusable commits.

Changes

Rollback record safety

Layer / File(s)	Summary
Python record contract tinyagentos/rollback.py, tests/test_rollback.py	Python accepts only full 40- or 64-character object names. It rejects unsafe writes and drops invalid branches while preserving valid commits. Tests compare Python and shell validation rules.
Shell parsing and target selection scripts/rollback.sh, tests/test_rollback_script_parse.py, changelog.d/...	The shell script reads record fields as data, validates commits and branches, restores usable targets, and uses the newest recovery tag for unusable commits. End-to-end tests cover injection payloads, malformed records, unsafe branches, and explicit targets.

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: 🔵 Low · up to 1817e

Rollback records using CRLF line endings can ignore a valid recorded target and instead restore the recovery tag, potentially rolling an agent back further than intended. Normalize CRLF input and add a shared regression case before merge.

Sequence Diagram(s)

sequenceDiagram
  participant UpdateProcess
  participant RollbackRecord
  participant rollback.sh
  participant Git
  UpdateProcess->>RollbackRecord: write validated branch and object name
  rollback.sh->>RollbackRecord: read record fields as data
  rollback.sh->>Git: validate recorded object name and branch
  alt valid recorded commit
    rollback.sh->>Git: restore recorded commit
  else invalid recorded commit
    rollback.sh->>Git: select newest taos-pre-update-* tag
  end

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🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main security change: preventing rollback.sh from sourcing a data file as Bash under sudo. It is specific and related to the changeset.
Docstring Coverage	✅ Passed	Docstring coverage is 80.95% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 42 functions across 4 files. (1 skipped: 1 …
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Code Review Summary

Status: No Issues Found | Recommendation: Merge

All six previously raised issues are fixed and verified at head 1817efe71:

1. scripts/rollback.sh SHA range tightened to full object name (40 / 64 hex) via new sha_safe(), delegating to bash =~ rather than a regex range that drifted.
2. scripts/rollback.sh branch validation now delegates to git check-ref-format refs/heads/<name> plus a leading-dash guard (the argv-option hazard git itself does not enforce).
3. tinyagentos/rollback.py SHA regex tightened to ^(?:[0-9a-fA-F]{40}|[0-9a-fA-F]{64})$ and switched to fullmatch() so a trailing newline (which $ also accepts in re.match) is no longer writable.
4. tinyagentos/rollback.py _ref_safe() mirrors git check-ref-format's rules; the reader drops an unsafe branch but keeps the commit, matching the shell end.
5. tests/test_rollback.py brace-counting extractor replaced with a column-0 } anchor and reused via a shared _shell_func() helper for record_field, ref_safe, and sha_safe.
6. tests/test_rollback_script_parse.py payload test now asserts HEAD moved to the recovery tag and the script exited 0; fixture grew a third commit so recorded target and recovery tag are distinguishable.

The CodeRabbit finding on re.match accepting a trailing newline is folded too: both call sites use fullmatch(), and test_shell_sha_safe_matches_the_writer pins the shell and Python sides together over a whitespace table.

Files Reviewed (5 files)

• changelog.d/tsk-rw62vx-rollback-record-parsed-not-sourced.md
• scripts/rollback.sh
• tests/test_rollback.py
• tests/test_rollback_script_parse.py
• tinyagentos/rollback.py

Previous Review Summary (commit d4dadd9)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit d4dadd9)

Status: 6 Issues Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	0
SUGGESTION	6

Issue Details (click to expand)

SUGGESTION

File	Line	Issue
scripts/rollback.sh	59	SHA regex accepts 7-40 hex; tighten to 40 to match the writer and remove the prefix-collision attack surface.
scripts/rollback.sh	64	Branch regex permits . and ..; tighten so invalid refnames are rejected here, not by a downstream git checkout error.
tinyagentos/rollback.py	29	Same SHA-range concern as scripts/rollback.sh:59; consider 40-char hex only.
tinyagentos/rollback.py	84	Python reader does not validate prev_branch for ref-illegal chars; apply the same defense-in-depth check the shell reader uses.
tests/test_rollback.py	18	_shell_record_field extracts the function by counting braces; fragile to any refactor of record_field.
tests/test_rollback_script_parse.py	85	Payload-non-execution test should also assert HEAD moved to the recovery tag, not just that sentinels were not created.

Files Reviewed (5 files)

• changelog.d/tsk-rw62vx-rollback-record-parsed-not-sourced.md - 0 issues
• scripts/rollback.sh - 2 issues
• tests/test_rollback.py - 1 issue
• tests/test_rollback_script_parse.py - 1 issue
• tinyagentos/rollback.py - 2 issues

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_{Reviewed by minimax-m3:free · Input: 57.8K · Output: 9.8K · Cached: 252.7K}

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Actionable comments posted: 1

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Inline comments:
In `@tinyagentos/rollback.py`:
- Line 79: Update the SHA validation in record_pre_update() to use
_SHA_RE.fullmatch() so a trailing newline is rejected, and add a regression test
covering 40- and/or 64-character SHA values with "\n" appended.

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📒 Files selected for processing (5)

• changelog.d/tsk-rw62vx-rollback-record-parsed-not-sourced.md
• scripts/rollback.sh
• tests/test_rollback.py
• tests/test_rollback_script_parse.py
• tinyagentos/rollback.py

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Actionable comments posted: 1

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.

Inline comments:
In `@scripts/rollback.sh`:
- Line 36: Normalize CRLF line endings in the record read by the rollback parser
before extracting the field value, so quoted prev_sha entries parse identically
to rollback.py and preserve the recorded target. Update the shared regression
coverage to include a CRLF-formatted record.

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📒 Files selected for processing (5)

• changelog.d/tsk-rw62vx-rollback-record-parsed-not-sourced.md
• scripts/rollback.sh
• tests/test_rollback.py
• tests/test_rollback_script_parse.py
• tinyagentos/rollback.py

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[jaylfc]

Fold pass 2026-09-06

Merged origin/dev (162 commits) with no conflicts.

• [1] scripts/rollback.sh -- Already fixed on current head: sha_safe() requires exactly 40/64 hex. Refuted (stale).
• [2] scripts/rollback.sh -- Already fixed on current head: ref_safe() defers to git check-ref-format, forbidding ../leading .. Refuted (stale).
• [3] tinyagentos/rollback.py -- Already fixed on current head: _SHA_RE requires exactly 40/64 hex via fullmatch(). Refuted (stale).
• [4] tinyagentos/rollback.py -- Already fixed on current head: _ref_safe() applied to prev_branch on read, same rule as the shell. Refuted (stale).
• [5] tests/test_rollback.py -- Already fixed on current head: _shell_func() anchors on the name() line and the first following } in column 0, not brace-counting. Refuted (stale).
• [6] tests/test_rollback_script_parse.py:93 -- Already fixed on current head: the payload-non-execution test now also asserts returncode == 0 and HEAD moved to the recovery tag. Refuted (stale).
• [7] scripts/rollback.sh:36 -- Fixed. record_field() now strips a trailing \r before parsing, so a CRLF-formatted record parses identically in both readers.

RED (before the fix):

assert _shell_record_field(tmp_path, "prev_sha") == SHA_A
E       assert "'a1b2c3d4e5f...9012345678'\n" == 'a1b2c3d4e5f6...e8f9012345678'
E         - a1b2c3d4e5f60718293a4b5c6d7e8f9012345678
E         + 'a1b2c3d4e5f60718293a4b5c6d7e8f9012345678'
FAILED tests/test_rollback.py::test_crlf_record_is_normalized_by_both_readers

Green: tests/test_rollback.py tests/test_rollback_script_parse.py -- 99 passed.

Changelog fragment extended: changelog.d/tsk-rw62vx-rollback-record-parsed-not-sourced.md.

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