Code search on file media_stream_dispatcher_host.cc, suspected CL is
https://chromium.googlesource.com/chromium/src/+/da330facfb86b325030fef9bc7cf4f85930b6d16
guidou@, could you please take a look and reassign if it is not related your changes.

Thank you

ClusterFuzz has detected this issue as fixed in range 401018:401114.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6060633309315072

Fuzzer: ipc_fuzzer_gen
Job Type: linux_cfi_chrome_ipc
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  it != device_change_subscribers_.end() in media_stream_dispatcher_host.cc
  content::MediaStreamDispatcherHost::OnCancelDeviceChangeNotifications
  _ZN3IPC16DispatchToMethodIN7content25MediaStreamDispatcherHostEMS2_FviEvSt5tuple
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_cfi_chrome_ipc&range=400972:401018
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_cfi_chrome_ipc&range=401018:401114

Minimized Testcase (0.10 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97kIO9WPisVyvJkHhK-R2Z953UNTB3WtTljnIw1L_KrgrJCdmUY-12V_SV1xXtN1QAW0A5-GUJfVjoFvlQNQWfdolL6MJiKJVgm1qEbPBnBrnVmCc79t1QcG_S9Xxj2WZUzyeencLEDbxn5gIxpX4gFcYdZ1Q?testcase_id=6060633309315072

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

As per update#3, marking the bug as fixed.

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