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SubjectApplied "ASoC: samsung: i2s: Null pointer dereference on samsung_i2s_remove" to the asoc tree
The patch

ASoC: samsung: i2s: Null pointer dereference on samsung_i2s_remove

has been applied to the asoc tree at


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From 7b814a7d4e83b0917efef9dd11a8c095371f987c Mon Sep 17 00:00:00 2001
From: Anton Vasilyev <>
Date: Tue, 15 Aug 2017 15:19:54 +0300
Subject: [PATCH] ASoC: samsung: i2s: Null pointer dereference on

If (quirks & QUIRK_SEC_DAI == 0) then samsung_i2s_probe() doesn't allocate
sec_dai and pri_dai->sec_dai remains Null, but samsung_i2s_remove()
performs pri_dai->sec_dai dereference in any case.

The patch removes useless reinitialization of sec_dai at
samsung_i2s_remove(), because resources are under devm control.

Found by Linux Driver Verification project (

Signed-off-by: Anton Vasilyev <>
Acked-by: Krzysztof Kozlowski <>
Signed-off-by: Mark Brown <>
sound/soc/samsung/i2s.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index daf7b892c967..10a4da06c0a1 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -1388,13 +1388,9 @@ static int samsung_i2s_probe(struct platform_device *pdev)

static int samsung_i2s_remove(struct platform_device *pdev)
- struct i2s_dai *pri_dai, *sec_dai;
+ struct i2s_dai *pri_dai;

pri_dai = dev_get_drvdata(&pdev->dev);
- sec_dai = pri_dai->sec_dai;
- pri_dai->sec_dai = NULL;
- sec_dai->pri_dai = NULL;

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