Commit 60c961a9 authored by Nicolai Krakowiak's avatar Nicolai Krakowiak Committed by Takashi Iwai
Browse files

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



Signed-off-by: default avatarNicolai Krakowiak <nicolai.krakowiak@gmail.com>
Acked-by: default avatarDaniel Mack <zonque@gmail.com>
Acked-by: default avatarClemens Ladisch <clemens@ladisch.de>
Cc: stable@kernel.org
Signed-off-by: default avatarTakashi 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 {