From 89a76d18898a0172010c25e5a7c66d57c16b9196 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Thu, 13 Sep 2018 15:33:16 +0100 Subject: [PATCH 1/2] Fix handling of redacted events from federation If we receive an event that doesn't pass their content hash check (e.g. due to already being redacted) then we hit a bug which causes an exception to be raised, which then promplty stops the event (and request) from being processed. This effects all sorts of federation APIs, including joining rooms with a redacted state event. --- synapse/events/__init__.py | 5 +++++ synapse/federation/federation_base.py | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py index 51f9084b9..b782af630 100644 --- a/synapse/events/__init__.py +++ b/synapse/events/__init__.py @@ -13,6 +13,8 @@ # See the License for the specific language governing permissions and # limitations under the License. +import six + from synapse.util.caches import intern_dict from synapse.util.frozenutils import freeze @@ -147,6 +149,9 @@ class EventBase(object): def items(self): return list(self._event_dict.items()) + def keys(self): + return six.iterkeys(self._event_dict) + class FrozenEvent(EventBase): def __init__(self, event_dict, internal_metadata_dict={}, rejected_reason=None): diff --git a/synapse/federation/federation_base.py b/synapse/federation/federation_base.py index 61782ae1c..b7ad729c6 100644 --- a/synapse/federation/federation_base.py +++ b/synapse/federation/federation_base.py @@ -153,7 +153,7 @@ class FederationBase(object): # *actual* redacted copy to be on the safe side.) redacted_event = prune_event(pdu) if ( - set(six.iterkeys(redacted_event)) == set(six.iterkeys(pdu)) and + set(redacted_event.keys()) == set(pdu.keys()) and set(six.iterkeys(redacted_event.content)) == set(six.iterkeys(pdu.content)) ): From 13193a6e2bd3557cae89e34438e8598f75276c34 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Thu, 13 Sep 2018 15:46:45 +0100 Subject: [PATCH 2/2] Newsfile --- changelog.d/3859.bugfix | 1 + 1 file changed, 1 insertion(+) create mode 100644 changelog.d/3859.bugfix diff --git a/changelog.d/3859.bugfix b/changelog.d/3859.bugfix new file mode 100644 index 000000000..ec5b17246 --- /dev/null +++ b/changelog.d/3859.bugfix @@ -0,0 +1 @@ +Fix handling of redacted events from federation