[alsa-devel] [PATCH] ASoC: Intel: Fix a buffer overflow issue

[Jie Yang]

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 at intel.com>
---
 sound/soc/intel/haswell/sst-haswell-pcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/intel/haswell/sst-haswell-pcm.c b/sound/soc/intel/haswell/sst-haswell-pcm.c
index 157b3a6..23ae040 100644
--- 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)
-- 
1.9.1