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authorTakashi Iwai <tiwai@suse.de>2013-10-29 16:37:11 +0100
committerTakashi Iwai <tiwai@suse.de>2013-10-29 16:42:36 +0100
commite12483e0f3dbc32dad8fa1dc97efac22b6aee94f (patch)
tree53207314a9b65a25832427e0d835032f132f1ecc /include/sound
parent2026d24ef2ea8caad5e87662a58075e930ccab63 (diff)
ALSA: ak4114: Fix wrong register array size
The size of the register cache array is actually 6 instead of 7, as it caches up to AK4114_REG_INT1_MASK. This resulted in unexpected access out of array range, although most of them aren't so serious (just reading one more byte on the stack at snd_ak4114_create()). Also, the check of cache size was wrongly done by checking with sizeof() instead of ARRAY_SIZE(). Fixed this together. (And yes, hardcoded numbers are bad, but I keep the coding style as is for making it clear what this patch actually does.) Spotted by coverity among several CIDs, e.g. 711621. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/ak4114.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/sound/ak4114.h b/include/sound/ak4114.h
index 3ce69fd92523..52f02a60dba7 100644
--- a/include/sound/ak4114.h
+++ b/include/sound/ak4114.h
@@ -170,7 +170,7 @@ struct ak4114 {
void * private_data;
unsigned int init: 1;
spinlock_t lock;
- unsigned char regmap[7];
+ unsigned char regmap[6];
unsigned char txcsb[5];
struct snd_kcontrol *kctls[AK4114_CONTROLS];
struct snd_pcm_substream *playback_substream;
@@ -189,7 +189,7 @@ struct ak4114 {
int snd_ak4114_create(struct snd_card *card,
ak4114_read_t *read, ak4114_write_t *write,
- const unsigned char pgm[7], const unsigned char txcsb[5],
+ const unsigned char pgm[6], const unsigned char txcsb[5],
void *private_data, struct ak4114 **r_ak4114);
void snd_ak4114_reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char mask, unsigned char val);
void snd_ak4114_reinit(struct ak4114 *ak4114);