ALSA: rawmidi: Take open_mutex around parameter changes

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The input/output parameter changes are pretty intrusive, possibly
involving with the buffer resizing operation.  Hence those should be
performed exclusively; otherwise some ugly race could happen.

This patch puts the existing open_mutex for snd_rawmidi_input_params()
and *_output_params() for protecting the concurrent calls.  Since
those are exported, it's also meant for hardening from the external
calls, too.

Link: https://lore.kernel.org/r/20220617144051.18985-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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This commit is contained in:

Takashi Iwai 2022-06-17 16:40:49 +02:00

parent f1d4043335

commit 94b98194b6

1 changed files with 25 additions and 14 deletions

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sound/core/rawmidi.c

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