myxce/.wolf/bugs/bug-1197.md
Rongsong Shen d26ff8870d
feat(buglog): one Markdown record per bug, checked against a record standard
The buglog was one 27K-line JSON file whose fields covered only symptom,
root cause and fix, as free text: 2% of entries named the code version a
bug was found on, 12% the build profile, 36% a way to reproduce, and 58% of
the file was OpenWolf hook auto-detections ("Missing guard clause",
"Function not marked async" on .md files).

- .claude/skills/buglog/bug-record.md: the record standard. Eight
  sections (Summary as the title, Description, Environment, Reproduction;
  Root cause, Fix, Verification, References once fixed), each with the
  content it must contain -- e.g. Environment needs the OS, the libc the
  failing binary loads (from its ELF interpreter: glibc 2.42 in the nix
  shell vs 2.40 on the host), toolchain, build profile and commit.
- .wolf/bugs/<id>.md: 500 records migrated from buglog.json; every field
  verified to round-trip. They carry legacy: true and an explicit "not
  recorded" where the old log had no such field; component derived from
  file paths, severity from keywords (else unknown), fix_commits from
  hashes in status_note/fix that git resolves (91 of 463 fixed).
- .wolf/buglog-archive.json: the 710 hook auto-detections, verbatim.
- .wolf/buglog.json is now an index generated from the records, keeping
  the fields OpenWolf's hooks and `openwolf bug search` read.
- scripts/buglog.py rewritten: new (template + Environment collected from
  the machine and --binary), check, status (refuses a status the record
  doesn't support; fixed needs Root cause, Fix, Verification and
  --commit hashes git resolves), note, recur, set, show, list, triage,
  env, index. 29 unittest cases in scripts/tests/test_buglog.py.
- scripts/git-hooks/pre-commit runs `check --staged`: incomplete staged
  records, a legacy record hand-changed to fixed without the fix-time
  sections, a new record claiming legacy: true, or a stale index refuse
  the commit.
- scripts/gitea-sync.py reads the records: issue body = the record's
  sections plus linked fix commits (origin remote, GITEA_COMMIT_REPO to
  override), and a body hash so an issue's text is refreshed when the
  record changes.
- bug-1866 rewritten to the full standard as the worked example.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-09-28 03:40:11 +00:00

1.9 KiB

id status status_updated status_note component severity timestamp last_seen occurrences files tags related fix_commits legacy
bug-1197 fixed 2026-09-24 controller unknown 2026-06-26T00:00:00.000Z 2026-09-19T09:00:00Z 3
src/controller/ha.c
endpoint-quiescence
c
dispatch_inflight
task-3.4a
tearing_down
wrong-reference
raft-drive-async
task-3.1
use-after-free
flag-on-hazard
deferred
review-finding
bug-1198
6e05dc1
true

bug-1197: raft-drive-async finding-1 (FLAG-ON ONLY, dormant): enabling peerctrl_dispatch creates an endpoint…

Description

raft-drive-async finding-1 (FLAG-ON ONLY, dormant): enabling peerctrl_dispatch creates an endpoint UAF — raft_cb_become_follower runs on a pool worker and endpoint_fini()s all peer vote-eps (frees ep->data) while the single io_worker can concurrently read ep_j->data in peer_ctrl_msg_handler_inline for a same-batch queued event

Environment

Not recorded (migrated from buglog.json).

Reproduction

Not recorded (migrated from buglog.json).

Root cause

Moving peer-control off the sequential io_worker onto the pool co-locates teardown (frees ep->data) and inbound delivery (reads ep->data) on different threads with no unmonitor-before-free ordering. Safe today only because g_drive_async_peerctrl_dispatch_enabled defaults OFF.

Fix

SUPERSEDED 2026-06-30 by bug-1298 endpoint reference counting (commit 6e05dc1). The pool-reachable teardown-frees-peer-ep UAF class is now governed generally by endpoint_ref/endpoint_unref (refcnt + heap_alloc gate) acquired per ep-bound VTASK_IO in vtask_enq and released in run_task/taskq_item_killer — a queued vtask holds a ref so the io_worker cannot free the ep out from under the dispatcher. Re-validate when raft-drive-async flips g_drive_async_peerctrl_dispatch ON.

Verification

Not recorded (migrated from buglog.json).

References

  • Related: bug-1198