linux-kernel - [PATCH] ASoC: codecs: aw88395: initialize cur_scene

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Date:   Sat,  4 Feb 2023 17:57:33 -0800
From:   Tom Rix <trix@...hat.com>
To:     lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, liweilei@...nic.com, colin.i.king@...il.com,
        wangweidong.a@...nic.com, zhaolei@...nic.com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Tom Rix <trix@...hat.com>
Subject: [PATCH] ASoC: codecs: aw88395: initialize cur_scene_id to 0

cppcheck reports
sound/soc/codecs/aw88395/aw88395_lib.c:789:6: error: Uninitialized variable: cur_scene_id [uninitvar]
 if (cur_scene_id == 0) {
     ^

Passing a garbage value to aw_dev_parse_data_by_sec_type_v1() will cause a crash
when the value is used as an array index.  This check assumes cur_scene_id is
initialized to 0, so initialize it to 0.

Fixes: 4345865b003b ("ASoC: codecs: ACF bin parsing and check library file for aw88395")
Signed-off-by: Tom Rix <trix@...hat.com>
---
 sound/soc/codecs/aw88395/aw88395_lib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/aw88395/aw88395_lib.c b/sound/soc/codecs/aw88395/aw88395_lib.c
index 64dde972f3f0..d7c31a202adc 100644
--- a/sound/soc/codecs/aw88395/aw88395_lib.c
+++ b/sound/soc/codecs/aw88395/aw88395_lib.c
@@ -769,7 +769,7 @@ static int aw_dev_parse_dev_type_v1(struct aw_device *aw_dev,
 {
 	struct aw_cfg_dde_v1 *cfg_dde =
 		(struct aw_cfg_dde_v1 *)((char *)prof_hdr + prof_hdr->hdr_offset);
-	int cur_scene_id;
+	int cur_scene_id = 0;
 	unsigned int i;
 	int ret;
 
-- 
2.26.3