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| author | Richard van der Hoff <1389908+richvdh@users.noreply.github.com> | 2019-12-16 13:14:37 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-12-16 13:14:37 +0000 |
| commit | 6920d88892e77aec787b6afc0e01e6e09dc36216 (patch) | |
| tree | 660ed70a4d95cb3e48f387e3fb725430e3f761b8 | |
| parent | Persist auth/state events at backwards extremities when we fetch them (#6526) (diff) | |
| download | synapse-6920d88892e77aec787b6afc0e01e6e09dc36216.tar.xz | |
Exclude rejected state events when calculating state at backwards extrems (#6527)
This fixes a weird bug where, if you were determined enough, you could end up with a rejected event forming part of the state at a backwards-extremity. Authing that backwards extrem would then lead to us trying to pull the rejected event from the db (with allow_rejected=False), which would fail with a 404.
| -rw-r--r-- | changelog.d/6527.bugfix | 1 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/changelog.d/6527.bugfix b/changelog.d/6527.bugfix new file mode 100644 index 0000000000..53214b0748 --- /dev/null +++ b/changelog.d/6527.bugfix @@ -0,0 +1 @@ +Fix a bug which could cause the federation server to incorrectly return errors when handling certain obscure event graphs. \ No newline at end of file diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 3f480f2056..3fccccfecd 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -605,7 +605,7 @@ class FederationHandler(BaseHandler): remote_event = event_map.get(event_id) if not remote_event: raise Exception("Unable to get missing prev_event %s" % (event_id,)) - if remote_event.is_state(): + if remote_event.is_state() and remote_event.rejected_reason is None: remote_state.append(remote_event) auth_chain = [event_map[e_id] for e_id in auth_event_ids if e_id in event_map] |