ASoC: Intel: Fix a buffer overflow issue

0day robot reported a buffer overflow issue:

...
sound/soc/intel/haswell/sst-haswell-pcm.c:1107 hsw_pcm_probe() error: buffer\
overflow 'hsw_dais' 4 <= 4
sound/soc/intel/haswell/sst-haswell-pcm.c:1109 hsw_pcm_probe() error: buffer\
overflow 'hsw_dais' 4 <= 4
...

Fix it by initializing the index(i) to correct value.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/haswell/sst-haswell-pcm.c b/sound/soc/intel/haswell/sst-haswell-pcm.c
index 157b3a6c509eccdfec3847db31eae5dd9d360eb2..23ae0400d6db99668b3d2b48b47eb003d2fc2e46 100644 (file)
--- a/sound/soc/intel/haswell/sst-haswell-pcm.c
+++ b/sound/soc/intel/haswell/sst-haswell-pcm.c
@@ -1103,7 +1103,7 @@ static int hsw_pcm_probe(struct snd_soc_platform *platform)
        return 0;
 
 err:
-       for (;i >= 0; i--) {
+       for (--i; i >= 0; i--) {
                if (hsw_dais[i].playback.channels_min)
                        snd_dma_free_pages(&priv_data->dmab[i][0]);
                if (hsw_dais[i].capture.channels_min)