From da11cc22be37e8858c19774779ad7d02d64a458c Mon Sep 17 00:00:00 2001 From: Patrick Cloke Date: Mon, 5 Oct 2020 10:24:17 -0400 Subject: [PATCH] Ensure that event.redacts is the proper type before handling it (#8457) This fixes a bug when backfilling invalid events. --- changelog.d/8457.bugfix | 1 + synapse/event_auth.py | 2 ++ 2 files changed, 3 insertions(+) create mode 100644 changelog.d/8457.bugfix diff --git a/changelog.d/8457.bugfix b/changelog.d/8457.bugfix new file mode 100644 index 0000000000..545b06d180 --- /dev/null +++ b/changelog.d/8457.bugfix @@ -0,0 +1 @@ +Fix a bug where backfilling a room with an event that was missing the `redacts` field would break. diff --git a/synapse/event_auth.py b/synapse/event_auth.py index 8c907ad596..56f8dc9caf 100644 --- a/synapse/event_auth.py +++ b/synapse/event_auth.py @@ -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