ALSA: control: Make sure that id->index does not overflow

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commit 883a1d49f0 upstream.

The ALSA control code expects that the range of assigned indices to a control is
continuous and does not overflow. Currently there are no checks to enforce this.
If a control with a overflowing index range is created that control becomes
effectively inaccessible and unremovable since snd_ctl_find_id() will not be
able to find it. This patch adds a check that makes sure that controls with a
overflowing index range can not be created.

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>

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Lars-Peter Clausen 2014-06-18 13:32:35 +02:00 • committed by Greg Kroah-Hartman

parent 34d900b548

commit faff2e120d

1 changed files with 3 additions and 0 deletions

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sound/core/control.c

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