Skip to content

fallbackswitch deadlock with active-pad notify

  • Fallbackswitch is holding the src_pad stream_lock while notifying active-pad.
  • Reading the active-pad property from a notify signal handler obtains the state lock.
  • The sink chain and event functions hold the state lock while obtaining the stream_lock.

If another thread is currently holding the state lock and waiting on the stream_lock while we're notifying active-pad with a handler, we end up in a deadlock.

Edited by Jan Alexander Steffens
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information