From 4c7587ef99e8057960a0d9cd3c50e73b90e3c9ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolai=20S=C3=B8borg?=
 <NicolaiSoeborg@users.noreply.github.com>
Date: Wed, 11 Nov 2020 14:24:53 +0100
Subject: [PATCH] Catch exceptions in password_providers (#8636)
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Signed-off-by: Nicolai Søborg <git@xn--sb-lka.org>
---
 changelog.d/8636.misc    |  1 +
 synapse/handlers/auth.py | 13 +++++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)
 create mode 100644 changelog.d/8636.misc

diff --git a/changelog.d/8636.misc b/changelog.d/8636.misc
new file mode 100644
index 0000000000..df4dca42f8
--- /dev/null
+++ b/changelog.d/8636.misc
@@ -0,0 +1 @@
+Catch exceptions during initialization of `password_providers`. Contributed by Nicolai Søborg.
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index ff103cbb92..213baea2e3 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -181,10 +181,15 @@ class AuthHandler(BaseHandler):
         #   better way to break the loop
         account_handler = ModuleApi(hs, self)
 
-        self.password_providers = [
-            module(config=config, account_handler=account_handler)
-            for module, config in hs.config.password_providers
-        ]
+        self.password_providers = []
+        for module, config in hs.config.password_providers:
+            try:
+                self.password_providers.append(
+                    module(config=config, account_handler=account_handler)
+                )
+            except Exception as e:
+                logger.error("Error while initializing %r: %s", module, e)
+                raise
 
         logger.info("Extra password_providers: %r", self.password_providers)
 
-- 
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