linux-kernel - [PATCH 1/2] ASoC: ops: fix signedness bug in snd_soc_put

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Date:   Fri, 28 Jan 2022 14:20:07 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Liam Girdwood <lgirdwood@...il.com>
Cc:     Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH 1/2] ASoC: ops: fix signedness bug in snd_soc_put_volsw()

The "val" and "val2" variables need to signed for the checking to work
as intended.

Fixes: 817f7c9335ec ("ASoC: ops: Reject out of bounds values in snd_soc_put_volsw()")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 sound/soc/soc-ops.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
index dc0e7c8d31f3..0091fa96eb48 100644
--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -310,8 +310,9 @@ int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
 	unsigned int invert = mc->invert;
 	int err;
 	bool type_2r = false;
-	unsigned int val2 = 0;
-	unsigned int val, val_mask;
+	unsigned int val_mask;
+	int val2 = 0;
+	int val;
 
 	if (sign_bit)
 		mask = BIT(sign_bit + 1) - 1;
-- 
2.20.1