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* [PATCH] mmc: dw_mmc: Fix to avoid potential NULL pointer dereference
@ 2019-03-19  0:19 ` Aditya Pakki
  0 siblings, 0 replies; 4+ messages in thread
From: Aditya Pakki @ 2019-03-19  0:19 UTC (permalink / raw)
  To: pakki001
  Cc: kjlu, Jaehoon Chung, Ulf Hansson, Kukjin Kim,
	Krzysztof Kozlowski, linux-mmc, linux-arm-kernel,
	linux-samsung-soc, linux-kernel

of_match_node can fail and return NULL in case no matching structure.
The patches checks for such a scenario and returns -ENXIO.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
---
 drivers/mmc/host/dw_mmc-exynos.c | 2 ++
 drivers/mmc/host/dw_mmc-k3.c     | 2 ++
 drivers/mmc/host/dw_mmc-pltfm.c  | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index d46c3439b508..8a75d7314606 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -554,6 +554,8 @@ static int dw_mci_exynos_probe(struct platform_device *pdev)
 	int ret;
 
 	match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);
+	if (!match)
+		return -ENXIO;
 	drv_data = match->data;
 
 	pm_runtime_get_noresume(&pdev->dev);
diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
index 89cdb3d533bb..cc50b7546a20 100644
--- a/drivers/mmc/host/dw_mmc-k3.c
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -459,6 +459,8 @@ static int dw_mci_k3_probe(struct platform_device *pdev)
 	const struct of_device_id *match;
 
 	match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
+	if (!match)
+		return -ENXIO;
 	drv_data = match->data;
 
 	return dw_mci_pltfm_register(pdev, drv_data);
diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
index 58c13e21bd5a..b1948989f617 100644
--- a/drivers/mmc/host/dw_mmc-pltfm.c
+++ b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -82,6 +82,8 @@ static int dw_mci_pltfm_probe(struct platform_device *pdev)
 
 	if (pdev->dev.of_node) {
 		match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
+		if (!match)
+			return -ENXIO;
 		drv_data = match->data;
 	}
 
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 4+ messages in thread
* [PATCH] mmc: dw_mmc: Fix to avoid potential NULL pointer dereference
@ 2019-03-19  0:19 ` Aditya Pakki
  0 siblings, 0 replies; 4+ messages in thread
From: Aditya Pakki @ 2019-03-19  0:19 UTC (permalink / raw)
  To: pakki001
  Cc: Ulf Hansson, linux-samsung-soc, kjlu, linux-mmc, linux-kernel,
	Krzysztof Kozlowski, Jaehoon Chung, Kukjin Kim, linux-arm-kernel

of_match_node can fail and return NULL in case no matching structure.
The patches checks for such a scenario and returns -ENXIO.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
---
 drivers/mmc/host/dw_mmc-exynos.c | 2 ++
 drivers/mmc/host/dw_mmc-k3.c     | 2 ++
 drivers/mmc/host/dw_mmc-pltfm.c  | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index d46c3439b508..8a75d7314606 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -554,6 +554,8 @@ static int dw_mci_exynos_probe(struct platform_device *pdev)
 	int ret;
 
 	match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);
+	if (!match)
+		return -ENXIO;
 	drv_data = match->data;
 
 	pm_runtime_get_noresume(&pdev->dev);
diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
index 89cdb3d533bb..cc50b7546a20 100644
--- a/drivers/mmc/host/dw_mmc-k3.c
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -459,6 +459,8 @@ static int dw_mci_k3_probe(struct platform_device *pdev)
 	const struct of_device_id *match;
 
 	match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
+	if (!match)
+		return -ENXIO;
 	drv_data = match->data;
 
 	return dw_mci_pltfm_register(pdev, drv_data);
diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
index 58c13e21bd5a..b1948989f617 100644
--- a/drivers/mmc/host/dw_mmc-pltfm.c
+++ b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -82,6 +82,8 @@ static int dw_mci_pltfm_probe(struct platform_device *pdev)
 
 	if (pdev->dev.of_node) {
 		match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
+		if (!match)
+			return -ENXIO;
 		drv_data = match->data;
 	}
 
-- 
2.17.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 4+ messages in thread
* Re: [PATCH] mmc: dw_mmc: Fix to avoid potential NULL pointer dereference【请注意，邮件由linux-mmc-owner@vger.kernel.org代发】
  2019-03-19  0:19 ` Aditya Pakki
@ 2019-03-19  0:43   ` Shawn Lin
  -1 siblings, 0 replies; 4+ messages in thread
From: Shawn Lin @ 2019-03-19  0:43 UTC (permalink / raw)
  To: Aditya Pakki
  Cc: shawn.lin, kjlu, Jaehoon Chung, Ulf Hansson, Kukjin Kim,
	Krzysztof Kozlowski, linux-mmc, linux-arm-kernel,
	linux-samsung-soc, linux-kernel

On 2019/3/19 8:19, Aditya Pakki wrote:
> of_match_node can fail and return NULL in case no matching structure.
> The patches checks for such a scenario and returns -ENXIO.
> 
> Signed-off-by: Aditya Pakki <pakki001@umn.edu>
> ---
>   drivers/mmc/host/dw_mmc-exynos.c | 2 ++
>   drivers/mmc/host/dw_mmc-k3.c     | 2 ++
>   drivers/mmc/host/dw_mmc-pltfm.c  | 2 ++
>   3 files changed, 6 insertions(+)
> 

Could you check dw_mmc-zx.c and dw_mmc-rockchip.c as well?

> diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
> index d46c3439b508..8a75d7314606 100644
> --- a/drivers/mmc/host/dw_mmc-exynos.c
> +++ b/drivers/mmc/host/dw_mmc-exynos.c
> @@ -554,6 +554,8 @@ static int dw_mci_exynos_probe(struct platform_device *pdev)
>   	int ret;
>   
>   	match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);
> +	if (!match)
> +		return -ENXIO;
>   	drv_data = match->data;
>   
>   	pm_runtime_get_noresume(&pdev->dev);
> diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
> index 89cdb3d533bb..cc50b7546a20 100644
> --- a/drivers/mmc/host/dw_mmc-k3.c
> +++ b/drivers/mmc/host/dw_mmc-k3.c
> @@ -459,6 +459,8 @@ static int dw_mci_k3_probe(struct platform_device *pdev)
>   	const struct of_device_id *match;
>   
>   	match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
> +	if (!match)
> +		return -ENXIO;
>   	drv_data = match->data;
>   
>   	return dw_mci_pltfm_register(pdev, drv_data);
> diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
> index 58c13e21bd5a..b1948989f617 100644
> --- a/drivers/mmc/host/dw_mmc-pltfm.c
> +++ b/drivers/mmc/host/dw_mmc-pltfm.c
> @@ -82,6 +82,8 @@ static int dw_mci_pltfm_probe(struct platform_device *pdev)
>   
>   	if (pdev->dev.of_node) {
>   		match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
> +		if (!match)
> +			return -ENXIO;
>   		drv_data = match->data;
>   	}
>   
> 



^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: [PATCH] mmc: dw_mmc: Fix to avoid potential NULL pointer dereference【请注意，邮件由linux-mmc-owner@vger.kernel.org代发】
@ 2019-03-19  0:43   ` Shawn Lin
  0 siblings, 0 replies; 4+ messages in thread
From: Shawn Lin @ 2019-03-19  0:43 UTC (permalink / raw)
  To: Aditya Pakki
  Cc: Ulf Hansson, linux-samsung-soc, linux-mmc, shawn.lin, kjlu,
	linux-kernel, Krzysztof Kozlowski, Jaehoon Chung, Kukjin Kim,
	linux-arm-kernel

On 2019/3/19 8:19, Aditya Pakki wrote:
> of_match_node can fail and return NULL in case no matching structure.
> The patches checks for such a scenario and returns -ENXIO.
> 
> Signed-off-by: Aditya Pakki <pakki001@umn.edu>
> ---
>   drivers/mmc/host/dw_mmc-exynos.c | 2 ++
>   drivers/mmc/host/dw_mmc-k3.c     | 2 ++
>   drivers/mmc/host/dw_mmc-pltfm.c  | 2 ++
>   3 files changed, 6 insertions(+)
> 

Could you check dw_mmc-zx.c and dw_mmc-rockchip.c as well?

> diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
> index d46c3439b508..8a75d7314606 100644
> --- a/drivers/mmc/host/dw_mmc-exynos.c
> +++ b/drivers/mmc/host/dw_mmc-exynos.c
> @@ -554,6 +554,8 @@ static int dw_mci_exynos_probe(struct platform_device *pdev)
>   	int ret;
>   
>   	match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);
> +	if (!match)
> +		return -ENXIO;
>   	drv_data = match->data;
>   
>   	pm_runtime_get_noresume(&pdev->dev);
> diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
> index 89cdb3d533bb..cc50b7546a20 100644
> --- a/drivers/mmc/host/dw_mmc-k3.c
> +++ b/drivers/mmc/host/dw_mmc-k3.c
> @@ -459,6 +459,8 @@ static int dw_mci_k3_probe(struct platform_device *pdev)
>   	const struct of_device_id *match;
>   
>   	match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
> +	if (!match)
> +		return -ENXIO;
>   	drv_data = match->data;
>   
>   	return dw_mci_pltfm_register(pdev, drv_data);
> diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
> index 58c13e21bd5a..b1948989f617 100644
> --- a/drivers/mmc/host/dw_mmc-pltfm.c
> +++ b/drivers/mmc/host/dw_mmc-pltfm.c
> @@ -82,6 +82,8 @@ static int dw_mci_pltfm_probe(struct platform_device *pdev)
>   
>   	if (pdev->dev.of_node) {
>   		match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
> +		if (!match)
> +			return -ENXIO;
>   		drv_data = match->data;
>   	}
>   
> 



_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-03-19  0:43 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2019-03-19  0:19 [PATCH] mmc: dw_mmc: Fix to avoid potential NULL pointer dereference Aditya Pakki
2019-03-19  0:19 ` Aditya Pakki
2019-03-19  0:43 ` [PATCH] mmc: dw_mmc: Fix to avoid potential NULL pointer dereference【请注意，邮件由linux-mmc-owner@vger.kernel.org代发】 Shawn Lin
2019-03-19  0:43   ` Shawn Lin

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