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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>,
        Sasha Levin <sashal@kernel.org>, alsa-devel@alsa-project.org
Subject: [PATCH AUTOSEL 5.13 068/114] ALSA: control_led - fix initialization in the mode show callback
Date:   Fri,  9 Jul 2021 22:17:02 -0400
Message-Id: <20210710021748.3167666-68-sashal@kernel.org>
In-Reply-To: <20210710021748.3167666-1-sashal@kernel.org>
References: <20210710021748.3167666-1-sashal@kernel.org>
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From: Jaroslav Kysela <perex@perex.cz>

[ Upstream commit e381a14c3e3a4e90e293d4eaa5a3ab8ae98b9973 ]

The str variable should be always initialized before use even if
the switch covers all cases. This is a minimalistic fix: Assign NULL,
the sprintf() may print '(null)' if something is corrupted.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20210614071710.1786866-1-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/core/control_led.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/control_led.c b/sound/core/control_led.c
index a90e31dbde61..ff7fd5e29551 100644
--- a/sound/core/control_led.c
+++ b/sound/core/control_led.c
@@ -397,7 +397,7 @@ static ssize_t show_mode(struct device *dev,
 			 struct device_attribute *attr, char *buf)
 {
 	struct snd_ctl_led *led = container_of(dev, struct snd_ctl_led, dev);
-	const char *str;
+	const char *str = NULL;
 
 	switch (led->mode) {
 	case MODE_FOLLOW_MUTE:	str = "follow-mute"; break;
-- 
2.30.2