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SubjectApplied "wcd9335: fix a incorrect use of kstrndup()" to the asoc tree
The patch

wcd9335: fix a incorrect use of kstrndup()

has been applied to the asoc tree at for-5.3

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tree (usually sometime in the next 24 hours) and sent to Linus during
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From a54988113985ca22e414e132054f234fc8a92604 Mon Sep 17 00:00:00 2001
From: Gen Zhang <>
Date: Wed, 29 May 2019 09:53:05 +0800
Subject: [PATCH] wcd9335: fix a incorrect use of kstrndup()

In wcd9335_codec_enable_dec(), 'widget_name' is allocated by kstrndup().
However, according to doc: "Note: Use kmemdup_nul() instead if the size
is known exactly." So we should use kmemdup_nul() here instead of

Signed-off-by: Gen Zhang <>
Signed-off-by: Mark Brown <>
sound/soc/codecs/wcd9335.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
index a04a7cedd99d..85737fe54474 100644
--- a/sound/soc/codecs/wcd9335.c
+++ b/sound/soc/codecs/wcd9335.c
@@ -2734,7 +2734,7 @@ static int wcd9335_codec_enable_dec(struct snd_soc_dapm_widget *w,
char *dec;
u8 hpf_coff_freq;

- widget_name = kstrndup(w->name, 15, GFP_KERNEL);
+ widget_name = kmemdup_nul(w->name, 15, GFP_KERNEL);
if (!widget_name)
return -ENOMEM;

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