From 3e58e1987c318399d02ebdd683c8b68b0529b08a Mon Sep 17 00:00:00 2001
From: uvjustin <46082645+uvjustin@users.noreply.github.com>
Date: Wed, 19 Jul 2023 15:06:04 +0800
Subject: [PATCH] Avoid infinite loop on corrupt stream recording (#96881)

* Avoid infinite loop on corrupt stream recording

* Update tests
---
 homeassistant/components/stream/fmp4utils.py | 2 +-
 tests/components/stream/test_worker.py       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/homeassistant/components/stream/fmp4utils.py b/homeassistant/components/stream/fmp4utils.py
index 5ec27a1768c..7276e7a0d9b 100644
--- a/homeassistant/components/stream/fmp4utils.py
+++ b/homeassistant/components/stream/fmp4utils.py
@@ -151,7 +151,7 @@ def find_moov(mp4_io: BufferedIOBase) -> int:
     while 1:
         mp4_io.seek(index)
         box_header = mp4_io.read(8)
-        if len(box_header) != 8:
+        if len(box_header) != 8 or box_header[0:4] == b"\x00\x00\x00\x00":
             raise HomeAssistantError("moov atom not found")
         if box_header[4:8] == b"moov":
             return index
diff --git a/tests/components/stream/test_worker.py b/tests/components/stream/test_worker.py
index 0dc67c37403..e0152190d90 100644
--- a/tests/components/stream/test_worker.py
+++ b/tests/components/stream/test_worker.py
@@ -245,7 +245,7 @@ class FakePyAvBuffer:
         # Forward to appropriate FakeStream
         packet.stream.mux(packet)
         # Make new init/part data available to the worker
-        self.memory_file.write(b"\x00\x00\x00\x00moov")
+        self.memory_file.write(b"\x00\x00\x00\x08moov")
 
     def close(self):
         """Close the buffer."""