Re: [PATCH v2] audio/jack: fix use after free segfault

[Gerd Hoffmann]

  Hi,

> As JACK1 and JACK2 are interchangeable and JACK2 has "cleanup" routine
> that JACK1 does not have, we need to determine which version is in use
> at runtime. Unfortunatly there is no way to determine which is in use
> other then to look for symbols that are missing in JACK1, which in this
> case is `jack_get_version`.

No.  That'll quickly becomes a maintainance nightmare.

How about moving the qjack_client_fini() call to qjack_shutdown()?  Or,
if that isn't an option due to qjack_shutdown being called from a signal
handler, schedule a bottom half calling qjack_client_fini()?

take care,
  Gerd