synapse/changelog.d/10956.bugfix at 5e29d417fc5933e26ba85a40c298d46b09580330 - mirrors/synapse - Code den of a Norwegian 🐻

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Richard van der Hoff 3a5b0cbe7a

Ensure that we reject events which use rejected events for auth (#10956 )

When we consider whether to accept events, we should not accept those which
depend on rejected events for their auth events.

This (together with earlier changes such as
https://github.com/matrix-org/synapse/pull/10771 and
https://github.com/matrix-org/synapse/pull/10896) forms a partial fix to
https://github.com/matrix-org/synapse/issues/9595. There still remain code
paths where we do not check the `auth_events` at all.

2021-10-05 13:23:29 +01:00

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Fix a long-standing bug which meant that events received over federation were sometimes incorrectly accepted into the room state.