Messages in this thread | | | Date | Tue, 22 Mar 2022 18:14:35 +0100 | Subject | Re: [PATCH 0/4] ALSA: pcm: Fix ioctl races | From | Jaroslav Kysela <> |
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On 22. 03. 22 18:07, Takashi Iwai wrote: > Hi, > > this is a patch set to address the recently reported bug for the racy > PCM ioctls. In short, the current ALSA PCM core doesn't take enough > care of concurrent ioctl calls, and the concurrent calls may result in > a use-after-free. The reported problem was the concurrent hw_free > calls, but there can be similar cases with other code paths like > hw_params, prepare, etc, too. > > The patch set introduces the new runtime->buffer_mutex for protecting > those. The first patch is the fix for the reported issue (the races > with hw_free), while the rest three are more hardening for the other > similar executions.
Thank you Takashi.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
-- Jaroslav Kysela <perex@perex.cz> Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
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