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From: Sylwester Nawrocki <s.nawrocki@samsung.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	alsa-devel@alsa-project.org
Cc: tiwai@suse.de, broonie@kernel.org,
	Krzysztof Kozlowski <krzk@kernel.org>,
	stable@vger.kernel.org
Subject: Re: [PATCH v2 1/6] ASoC: samsung: tm2_wm5510: fix check of of_parse return value
Date: Tue, 23 Feb 2021 11:47:54 +0100	[thread overview]
Message-ID: <2c96aa88-2a53-3eca-e9d7-24ea9afe63a7@samsung.com> (raw)
In-Reply-To: <20210222213306.22654-2-pierre-louis.bossart@linux.intel.com>

On 22.02.2021 22:33, Pierre-Louis Bossart wrote:
> cppcheck warning:
> 
> sound/soc/samsung/tm2_wm5110.c:605:6: style: Variable 'ret' is
> reassigned a value before the old one has been
> used. [redundantAssignment]
>  ret = devm_snd_soc_register_component(dev, &tm2_component,
>      ^
> sound/soc/samsung/tm2_wm5110.c:554:7: note: ret is assigned
>   ret = of_parse_phandle_with_args(dev->of_node, "i2s-controller",
>       ^
> sound/soc/samsung/tm2_wm5110.c:605:6: note: ret is overwritten
>  ret = devm_snd_soc_register_component(dev, &tm2_component,
>      ^
> 
> The args is a stack variable, so it could have junk (uninitialized)
> therefore args.np could have a non-NULL and random value even though
> property was missing. Later could trigger invalid pointer dereference.
> 
> This patch provides the correct fix, there's no need to check for
> args.np because args.np won't be initialized on errors.
> 
> Fixes: 75fa6833aef3 ("ASoC: samsung: tm2_wm5110: check of_parse return value")
> Fixes: 8d1513cef51a ("ASoC: samsung: Add support for HDMI audio on TM2board")
> Cc: <stable@vger.kernel.org>
> Suggested-by: Krzysztof Kozlowski <krzk@kernel.org>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

Thank you for fixing all those issues.

WARNING: multiple messages have this Message-ID (diff)
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	alsa-devel@alsa-project.org
Cc: tiwai@suse.de, broonie@kernel.org, stable@vger.kernel.org,
	Krzysztof Kozlowski <krzk@kernel.org>
Subject: Re: [PATCH v2 1/6] ASoC: samsung: tm2_wm5510: fix check of of_parse return value
Date: Tue, 23 Feb 2021 11:47:54 +0100	[thread overview]
Message-ID: <2c96aa88-2a53-3eca-e9d7-24ea9afe63a7@samsung.com> (raw)
In-Reply-To: <20210222213306.22654-2-pierre-louis.bossart@linux.intel.com>

On 22.02.2021 22:33, Pierre-Louis Bossart wrote:
> cppcheck warning:
> 
> sound/soc/samsung/tm2_wm5110.c:605:6: style: Variable 'ret' is
> reassigned a value before the old one has been
> used. [redundantAssignment]
>  ret = devm_snd_soc_register_component(dev, &tm2_component,
>      ^
> sound/soc/samsung/tm2_wm5110.c:554:7: note: ret is assigned
>   ret = of_parse_phandle_with_args(dev->of_node, "i2s-controller",
>       ^
> sound/soc/samsung/tm2_wm5110.c:605:6: note: ret is overwritten
>  ret = devm_snd_soc_register_component(dev, &tm2_component,
>      ^
> 
> The args is a stack variable, so it could have junk (uninitialized)
> therefore args.np could have a non-NULL and random value even though
> property was missing. Later could trigger invalid pointer dereference.
> 
> This patch provides the correct fix, there's no need to check for
> args.np because args.np won't be initialized on errors.
> 
> Fixes: 75fa6833aef3 ("ASoC: samsung: tm2_wm5110: check of_parse return value")
> Fixes: 8d1513cef51a ("ASoC: samsung: Add support for HDMI audio on TM2board")
> Cc: <stable@vger.kernel.org>
> Suggested-by: Krzysztof Kozlowski <krzk@kernel.org>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

Thank you for fixing all those issues.

  reply	other threads:[~2021-02-23 10:49 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-22 21:33 [PATCH v2 0/6] ASoC: samsung: remove cppcheck warnings Pierre-Louis Bossart
2021-02-22 21:33 ` [PATCH v2 1/6] ASoC: samsung: tm2_wm5510: fix check of of_parse return value Pierre-Louis Bossart
2021-02-22 21:33   ` Pierre-Louis Bossart
2021-02-23 10:47   ` Sylwester Nawrocki [this message]
2021-02-23 10:47     ` Sylwester Nawrocki
2021-02-23 19:40   ` Krzysztof Kozlowski
2021-02-23 19:40     ` Krzysztof Kozlowski
2021-02-22 21:33 ` [PATCH v2 2/6] ASoC: samsung: i2s: remove unassigned variable Pierre-Louis Bossart
2021-02-23 10:54   ` Sylwester Nawrocki
2021-02-22 21:33 ` [PATCH v2 3/6] ASoC: samsung: s3c24xx_simtec: add missing error check Pierre-Louis Bossart
2021-02-23 10:57   ` Sylwester Nawrocki
2021-02-22 21:33 ` [PATCH v2 4/6] ASoC: samsung: smdk_wm8994: add missing return Pierre-Louis Bossart
2021-02-23 11:08   ` Sylwester Nawrocki
2021-02-22 21:33 ` [PATCH v2 5/6] ASoC: samsung: snow: remove useless test Pierre-Louis Bossart
2021-02-23 11:19   ` Sylwester Nawrocki
2021-02-22 21:33 ` [PATCH v2 6/6] ASoC: samsung: tm2_wm5510: remove shadowed variable Pierre-Louis Bossart
2021-02-23 11:25   ` Sylwester Nawrocki
2021-02-23 15:13     ` Pierre-Louis Bossart
2021-02-23 18:29       ` Krzysztof Kozlowski
2021-02-23 19:24         ` Sylwester Nawrocki
2021-02-23 19:41   ` Krzysztof Kozlowski

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