From 7a33a02ffb0620b01892c6c6808bb711b3f63e9c Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 8 Mar 2018 08:32:41 +0100
Subject: [PATCH] ALSA: vmaster: Zero-clear ctl before calling slave get
Git-commit: 7a33a02ffb0620b01892c6c6808bb711b3f63e9c
Patch-mainline: v4.17-rc1
References: bsc#1121278

Use kzalloc() instead of kmalloc() so that we don't need to rely fully
on the slave get() callback to clear the control value that might be
copied to user-space.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/core/vmaster.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/vmaster.c b/sound/core/vmaster.c
index b67de2bb06a2..9e96186742d0 100644
--- a/sound/core/vmaster.c
+++ b/sound/core/vmaster.c
@@ -63,7 +63,7 @@ static int slave_update(struct link_slave *slave)
 	struct snd_ctl_elem_value *uctl;
 	int err, ch;
 
-	uctl = kmalloc(sizeof(*uctl), GFP_KERNEL);
+	uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
 	if (!uctl)
 		return -ENOMEM;
 	uctl->id = slave->slave.id;
-- 
2.20.1