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Ensure that event.redacts is the proper type before handling it (#8457)

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This fixes a bug when backfilling invalid events.
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Patrick Cloke 2020-10-05 10:24:17 -04:00 committed by GitHub
parent 0991a2da93
commit da11cc22be
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2 changed files with 3 additions and 0 deletions
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changelog.d/8457.bugfix Normal file
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@ -0,0 +1 @@
Fix a bug where backfilling a room with an event that was missing the `redacts` field would break.

2
synapse/event_auth.py
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@ -446,6 +446,8 @@ def check_redaction(
if room_version_obj.event_format == EventFormatVersions.V1:
redacter_domain = get_domain_from_id(event.event_id)
if not isinstance(event.redacts, str):
return False
redactee_domain = get_domain_from_id(event.redacts)
if redacter_domain == redactee_domain:
return True