From: Lars-Peter Clausen <lars@metafoo.de>
Date: Wed, 18 Jun 2014 11:32:33 +0000 (+0200)
Subject: ALSA: control: Don't access controls outside of protected regions
X-Git-Tag: v3.2.61~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=79b789d8e20e22196285ac98247b5aeee2cade17;p=pandora-kernel.git

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: Ben Hutchings <ben@decadent.org.uk>
---

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