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Commit 60c961a9 authored Aug 04, 2011 by Nicolai Krakowiak Committed by Takashi Iwai Aug 04, 2011

ALSA: snd-usb: avoid dividing by zero on invalid input



Signed-off-by: Nicolai Krakowiak <nicolai.krakowiak@gmail.com>
Acked-by: Daniel Mack <zonque@gmail.com>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Cc: stable@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent 824818b1

sound/usb/mixer.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1191,6 +1191,11 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void

		if (state->mixer->protocol == UAC_VERSION_1) {
		csize = hdr->bControlSize;
		if (!csize) {
		snd_printdd(KERN_ERR "usbaudio: unit %u: "
		"invalid bControlSize == 0\n", unitid);
		return -EINVAL;
		}
		channels = (hdr->bLength - 7) / csize - 1;
		bmaControls = hdr->bmaControls;
		} else {