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-rw-r--r--sound/usb/mixer.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index c22fa76e363a..ee9aa087d8b5 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -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 {