tree 8196ca6e1e37ff6ffa4840e91424c0594be39771
parent bdef56a6f5dd427848e45be4d79d82ae9aa695bd
author Lars-Peter Clausen <lars@metafoo.de> 1403091153 +0200
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074821 +0200

ALSA: control: Don't access controls outside of protected regions

commit fd9f26e4eca5d08a27d12c0933fceef76ed9663d upstream.

A control that is visible on the card->controls list can be freed at any time.
This means we must not access any of its memory while not holding the
controls_rw_lock. Otherwise we risk a use after free access.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>