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ALSA: control: Don't access controls outside of protected regions
authorLars-Peter Clausen <lars@metafoo.de>
Wed, 18 Jun 2014 11:32:33 +0000 (13:32 +0200)
committerTakashi Iwai <tiwai@suse.de>
Wed, 18 Jun 2014 13:13:07 +0000 (15:13 +0200)
commitfd9f26e4eca5d08a27d12c0933fceef76ed9663d
tree1b68c534f868ec086cf78e864888c99bdb70f5b5tree
parent82262a46627bebb0febcc26664746c25cef08563commit | diff
ALSA: control: Don't access controls outside of protected regions

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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/core/control.c diff | blob | history
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