From: Anton Vasilyev Date: Tue, 15 Aug 2017 12:19:54 +0000 (+0300) Subject: ASoC: samsung: i2s: Null pointer dereference on samsung_i2s_remove X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7b814a7d4e83b0917efef9dd11a8c095371f987c;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ASoC: samsung: i2s: Null pointer dereference on samsung_i2s_remove 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 (linuxtesting.org). Signed-off-by: Anton Vasilyev Acked-by: Krzysztof Kozlowski Signed-off-by: Mark Brown --- 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 @@ err_disable_clk: 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; pm_runtime_get_sync(&pdev->dev); pm_runtime_disable(&pdev->dev);