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

From: Gerd Hoffmann
Subject: Re: [PATCH v2] audio/jack: fix use after free segfault
Date: Wed, 19 Aug 2020 07:04:45 +0200


> 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,

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