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ALSA: asihpi: a couple array out of bounds issues

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These ->put() functions are called from snd_ctl_elem_write() with user
supplied data.  snd_asihpi_tuner_band_put() is missing a limit check and
the check in snd_asihpi_clksrc_put() can underflow.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Dan Carpenter 2013-09-13 10:44:44 +03:00 committed by Takashi Iwai
parent 3d0049e852
commit 0c21fccd97
1 changed files with 7 additions and 2 deletions
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9
sound/pci/asihpi/asihpi.c
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@ -1913,6 +1913,7 @@ static int snd_asihpi_tuner_band_put(struct snd_kcontrol *kcontrol,
struct snd_card_asihpi *asihpi = snd_kcontrol_chip(kcontrol);
*/
u32 h_control = kcontrol->private_value;
unsigned int idx;
u16 band;
u16 tuner_bands[HPI_TUNER_BAND_LAST];
u32 num_bands = 0;
@ -1920,7 +1921,10 @@ static int snd_asihpi_tuner_band_put(struct snd_kcontrol *kcontrol,
num_bands = asihpi_tuner_band_query(kcontrol, tuner_bands,
HPI_TUNER_BAND_LAST);
band = tuner_bands[ucontrol->value.enumerated.item[0]];
idx = ucontrol->value.enumerated.item[0];
if (idx >= ARRAY_SIZE(tuner_bands))
idx = ARRAY_SIZE(tuner_bands) - 1;
band = tuner_bands[idx];
hpi_handle_error(hpi_tuner_set_band(h_control, band));
return 1;
@ -2383,7 +2387,8 @@ static int snd_asihpi_clksrc_put(struct snd_kcontrol *kcontrol,
struct snd_card_asihpi *asihpi =
(struct snd_card_asihpi *)(kcontrol->private_data);
struct clk_cache *clkcache = &asihpi->cc;
int change, item;
unsigned int item;
int change;
u32 h_control = kcontrol->private_value;
change = 1;