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Persist auth/state events at backwards extremities when we fetch them #6526
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richvdh
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Dec 11, 2019
changelog.d/6525.bugfix
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| Fix a bug which could cause the federation server to incorrectly return errors when handling certain obscure event graphs. | |||
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the other half of this bugfix is still incoming, btw.
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This means that we also do auth on them, which is useful for later operations on them.
Any state or auth events returned by `_get_state_for_room` are now known to be persisted, so there is no need to persist them again.
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erikjohnston
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Dec 12, 2019
synapse/handlers/federation.py
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| await self._handle_new_event( | ||
| destination, event, state=None, auth_events=auth, | ||
| ) |
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This seems to be changing from persisting events in batches to doing them one by one, which feels like it'd be a bunch slower. Can we move the loop into here and then use the _handle_new_events?
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I've rearranged this in 44bd0fc. wdyt?
erikjohnston
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Dec 12, 2019
... by persisting any fetched events at the same time.
erikjohnston
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Dec 16, 2019
richvdh
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Dec 16, 2019
…#6526) The main point here is to make sure that the state returned by _get_state_in_room has been authed before we try to use it as state in the room.
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Dec 18, 2019
Synapse 1.7.1 (2019-12-18) ========================== This release includes several security fixes as well as a fix to a bug exposed by the security fixes. Administrators are encouraged to upgrade as soon as possible. Security updates ---------------- - Fix a bug which could cause room events to be incorrectly authorized using events from a different room. ([\#6501](#6501), [\#6503](#6503), [\#6521](#6521), [\#6524](#6524), [\#6530](#6530), [\#6531](#6531)) - Fix a bug causing responses to the `/context` client endpoint to not use the pruned version of the event. ([\#6553](#6553)) - Fix a cause of state resets in room versions 2 onwards. ([\#6556](#6556), [\#6560](#6560)) Bugfixes -------- - Fix a bug which could cause the federation server to incorrectly return errors when handling certain obscure event graphs. ([\#6526](#6526), [\#6527](#6527))
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The main point here is to make sure that the state returned by
_get_state_in_roomhas been authed before we try to use it as state in the room.The diff is a bit gnarly but I've tried to order it into distinct commits.
Based on #6524.