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| author | Daniel Mack <daniel@caiaq.de> | 2010-06-11 19:34:19 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-06-11 20:05:05 +0400 |
| commit | d07140ba7fe1b41713627c6dc3f169a00019fb0e (patch) | |
| tree | 247ef449b2476cee0d51481037878d8e84a2b517 /sound/usb/format.c | |
| parent | ff8bd64eaf2963752feaa0ac2f7ff1254e0091ce (diff) | |
| download | linux-d07140ba7fe1b41713627c6dc3f169a00019fb0e.tar.xz | |
ALSA: usb-audio: add check for faulty clock in parse_audio_format_rates_v2()
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/format.c')
| -rw-r--r-- | sound/usb/format.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/usb/format.c b/sound/usb/format.c index 5367cd1e52d9..df5b29fed000 100644 --- a/sound/usb/format.c +++ b/sound/usb/format.c @@ -218,6 +218,12 @@ static int parse_audio_format_rates_v2(struct snd_usb_audio *chip, int i, nr_rates, data_size, ret = 0; int clock = snd_usb_clock_find_source(chip, chip->ctrl_intf, fp->clock); + if (clock < 0) { + snd_printk(KERN_ERR "%s(): unable to find clock source (clock %d)\n", + __func__, clock); + goto err; + } + /* get the number of sample rates first by only fetching 2 bytes */ ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |