diff options
| author | Nicolai Krakowiak <nicolai.krakowiak@gmail.com> | 2011-08-04 15:56:27 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-15 18:31:36 -0700 |
| commit | e565b49adb0dc11ac644e4af63936012c6ab2f43 (patch) | |
| tree | dbbabff5c36d9c6cfe99fa8d448523e2a27f28fc /sound/usb | |
| parent | 818e2eaed9807b1816381856a10473cb58ca56e5 (diff) | |
ALSA: snd-usb: avoid dividing by zero on invalid input
commit 60c961a9e1ed879a4d151df6076bf1203f595f73 upstream.
Signed-off-by: Nicolai Krakowiak <nicolai.krakowiak@gmail.com>
Acked-by: Daniel Mack <zonque@gmail.com>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/mixer.c | 5 |
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 { |