[PATCH 0/4] add NULL test

[PATCH 0/4] add NULL test

[Julia Lawall]

Add NULL tests on various calls to kzalloc and devm_kzalloc.

The semantic match that finds these problems is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,y;
identifier fld;
@@

(
x = \(vmalloc\|kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|krealloc\|
        kmemdup\|kstrdup\|
	devm_kzalloc\|devm_kmalloc\|devm_kcalloc\|devm_kasprintf\|
	kmalloc_array\)(...,<+... __GFP_NOFAIL ...+>,...);
|
* x = \(vmalloc\|kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|krealloc\|
        kmemdup\|kstrdup\|
	devm_kzalloc\|devm_kmalloc\|devm_kcalloc\|devm_kasprintf\|
	kmalloc_array\)(...);
)
  ... when != (x) == NULL
      when != (x) != NULL
      when != (x) == 0
      when != (x) != 0
      when != x = y
(
  x->fld
|
  *x
|
  x[...]
)
// </smpl>

---

 drivers/s390/char/con3215.c                 |    2 ++
 drivers/s390/char/raw3270.c                 |    2 ++
 sound/soc/fsl/imx-pcm-dma.c                 |    2 ++
 sound/soc/intel/baytrail/sst-baytrail-pcm.c |    2 ++
 sound/soc/omap/omap-hdmi-audio.c            |    2 ++
 5 files changed, 10 insertions(+)

[PATCH 1/4] ASoC: imx-pcm-dma: add NULL test

[Julia Lawall]

Add NULL test on call to devm_kzalloc.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x;
@@

* x = devm_kzalloc(...);
  ... when != x == NULL
  *x
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 sound/soc/fsl/imx-pcm-dma.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/fsl/imx-pcm-dma.c b/sound/soc/fsl/imx-pcm-dma.c
index 1fc01ed..f3d3d1f 100644
--- a/sound/soc/fsl/imx-pcm-dma.c
+++ b/sound/soc/fsl/imx-pcm-dma.c
@@ -62,6 +62,8 @@ int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
 
 	config = devm_kzalloc(&pdev->dev,
 			sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
+	if (!config)
+		return -ENOMEM;
 	*config = imx_dmaengine_pcm_config;
 	if (size)
 		config->prealloc_buffer_size = size;

[PATCH 2/4] ASoC: omap-hdmi-audio: add NULL test

[Julia Lawall]

Add NULL test on call to devm_kzalloc.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x;
identifier fld;
@@

* x = devm_kzalloc(...);
  ... when != x == NULL
  x->fld
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 sound/soc/omap/omap-hdmi-audio.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/omap/omap-hdmi-audio.c b/sound/soc/omap/omap-hdmi-audio.c
index 584b237..f83cc2b 100644
--- a/sound/soc/omap/omap-hdmi-audio.c
+++ b/sound/soc/omap/omap-hdmi-audio.c
@@ -368,6 +368,8 @@ static int omap_hdmi_audio_probe(struct platform_device *pdev)
 	card->owner = THIS_MODULE;
 	card->dai_link =
 		devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL);
+	if (!card->dai_link)
+		return -ENOMEM;
 	card->dai_link->name = card->name;
 	card->dai_link->stream_name = card->name;
 	card->dai_link->cpu_dai_name = dev_name(ad->dssdev);

[PATCH 3/4] s390/cio: add NULL test

[Julia Lawall]

Add NULL test on call to kzalloc.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x;
identifier fld;
@@

* x = kzalloc(...);
  ... when != x == NULL
  x->fld
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/s390/char/con3215.c |    2 ++
 1 files changed, 2 insertions(+)

diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 0fc3fe5..7d82bbc 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -922,6 +922,8 @@ static int __init con3215_init(void)
 	spin_lock_init(&raw3215_freelist_lock);
 	for (i = 0; i < NR_3215_REQ; i++) {
 		req = kzalloc(sizeof(struct raw3215_req), GFP_KERNEL | GFP_DMA);
+		if (!req)
+			return -ENOMEM;
 		req->next = raw3215_freelist;
 		raw3215_freelist = req;
 	}

[PATCH 4/4] ASoC: Intel: add NULL test

[Julia Lawall]

Add NULL test on call to devm_kzalloc.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x;
identifier fld;
@@

* x = devm_kzalloc(...);
  ... when != x == NULL
  x->fld
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 sound/soc/intel/baytrail/sst-baytrail-pcm.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/intel/baytrail/sst-baytrail-pcm.c b/sound/soc/intel/baytrail/sst-baytrail-pcm.c
index 79547be..4765ad4 100644
--- a/sound/soc/intel/baytrail/sst-baytrail-pcm.c
+++ b/sound/soc/intel/baytrail/sst-baytrail-pcm.c
@@ -377,6 +377,8 @@ static int sst_byt_pcm_probe(struct snd_soc_platform *platform)
 
 	priv_data = devm_kzalloc(platform->dev, sizeof(*priv_data),
 				 GFP_KERNEL);
+	if (!priv_data)
+		return -ENOMEM;
 	priv_data->byt = plat_data->dsp;
 	snd_soc_platform_set_drvdata(platform, priv_data);
 

Re: [PATCH 1/4] ASoC: imx-pcm-dma: add NULL test

[Nicolin Chen]

On Sun, Dec 20, 2015 at 12:15:50PM +0100, Julia Lawall wrote:
> Add NULL test on call to devm_kzalloc.
> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression x;
> @@
> 
> * x = devm_kzalloc(...);
>   ... when != x == NULL
>   *x
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>

Thank you

> 
> ---
>  sound/soc/fsl/imx-pcm-dma.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/sound/soc/fsl/imx-pcm-dma.c b/sound/soc/fsl/imx-pcm-dma.c
> index 1fc01ed..f3d3d1f 100644
> --- a/sound/soc/fsl/imx-pcm-dma.c
> +++ b/sound/soc/fsl/imx-pcm-dma.c
> @@ -62,6 +62,8 @@ int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
>  
>  	config = devm_kzalloc(&pdev->dev,
>  			sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
> +	if (!config)
> +		return -ENOMEM;
>  	*config = imx_dmaengine_pcm_config;
>  	if (size)
>  		config->prealloc_buffer_size = size;
> 

Re: [PATCH 3/4] s390/cio: add NULL test

[Heiko Carstens]

On Sun, Dec 20, 2015 at 12:15:52PM +0100, Julia Lawall wrote:
> Add NULL test on call to kzalloc.
> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression x;
> identifier fld;
> @@
> 
> * x = kzalloc(...);
>   ... when != x == NULL
>   x->fld
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Aplied, thanks.

Re: [PATCH 2/4] ASoC: omap-hdmi-audio: add NULL test

[Peter Ujfalusi]

On 12/20/2015 01:15 PM, Julia Lawall wrote:
> Add NULL test on call to devm_kzalloc.
> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression x;
> identifier fld;
> @@
> 
> * x = devm_kzalloc(...);
>   ... when != x == NULL
>   x->fld
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

> ---
>  sound/soc/omap/omap-hdmi-audio.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/sound/soc/omap/omap-hdmi-audio.c b/sound/soc/omap/omap-hdmi-audio.c
> index 584b237..f83cc2b 100644
> --- a/sound/soc/omap/omap-hdmi-audio.c
> +++ b/sound/soc/omap/omap-hdmi-audio.c
> @@ -368,6 +368,8 @@ static int omap_hdmi_audio_probe(struct platform_device *pdev)
>  	card->owner = THIS_MODULE;
>  	card->dai_link =
>  		devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL);
> +	if (!card->dai_link)
> +		return -ENOMEM;
>  	card->dai_link->name = card->name;
>  	card->dai_link->stream_name = card->name;
>  	card->dai_link->cpu_dai_name = dev_name(ad->dssdev);
> 


-- 
Péter

Re: [PATCH 4/4] ASoC: Intel: add NULL test

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 268 bytes --]

On Sun, Dec 20, 2015 at 12:15:53PM +0100, Julia Lawall wrote:
> Add NULL test on call to devm_kzalloc.
> 
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)

If there was a patch 3 in this series I seem to be missing it.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 473 bytes --]

Re: [PATCH 4/4] ASoC: Intel: add NULL test

[Julia Lawall]

On Wed, 23 Dec 2015, Mark Brown wrote:

> On Sun, Dec 20, 2015 at 12:15:53PM +0100, Julia Lawall wrote:
> > Add NULL test on call to devm_kzalloc.
> > 
> > The semantic match that finds this problem is as follows:
> > (http://coccinelle.lip6.fr/)
> 
> If there was a patch 3 in this series I seem to be missing it.

It's not for you (drivers/s390/char/con3215.c).  Sorry for the confusion.

julia