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From: Shailendra Verma <shailendra.v@samsung.com>
To: Mark Yao <mark.yao@rock-chips.com>,
	David Airlie <airlied@linux.ie>, Heiko Stuebner <heiko@sntech.de>,
	dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org,
	p.shailesh@samsung.com, ashish.kalra@samsung.com,
	Shailendra Verma <shailendra.v@samsung.com>,
	Shailendra Verma <shailendra.capricorn@gmail.com>
Subject: [PATCH] Gpu: drm: rockchip - Fix possible NULL derefrence.
Date: Fri, 27 Jan 2017 16:41:50 +0530	[thread overview]
Message-ID: <1485515510-3129-1-git-send-email-shailendra.v@samsung.com> (raw)
In-Reply-To: CGME20170127111200epcas3p34bf747c6c3c0da798ddaf34788d1a324@epcas3p3.samsung.com

of_match_device could return NULL, and so can cause a NULL
pointer dereference later.

Signed-off-by: Shailendra Verma <shailendra.v@samsung.com>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index ca22e5e..dbb99cf 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -1082,15 +1082,22 @@ static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
 static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
 			     void *data)
 {
-	const struct of_device_id *of_id =
-			of_match_device(dw_mipi_dsi_dt_ids, dev);
-	const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
+	const struct of_device_id *of_id;
+	const struct dw_mipi_dsi_plat_data *pdata;
 	struct platform_device *pdev = to_platform_device(dev);
 	struct drm_device *drm = data;
 	struct dw_mipi_dsi *dsi;
 	struct resource *res;
 	int ret;
 
+	of_id = of_match_device(dw_mipi_dsi_dt_ids, dev);
+	if (!of_id) {
+		dev_err(dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
+
+	pdata = of_id->data;
+
 	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
 	if (!dsi)
 		return -ENOMEM;
-- 
1.7.9.5

WARNING: multiple messages have this Message-ID (diff)
From: Shailendra Verma <shailendra.v-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
To: Mark Yao <mark.yao-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
	David Airlie <airlied-cv59FeDIM0c@public.gmane.org>,
	Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	p.shailesh-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org,
	ashish.kalra-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org,
	Shailendra Verma
	<shailendra.v-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	Shailendra Verma
	<shailendra.capricorn-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: [PATCH] Gpu: drm: rockchip - Fix possible NULL derefrence.
Date: Fri, 27 Jan 2017 16:41:50 +0530	[thread overview]
Message-ID: <1485515510-3129-1-git-send-email-shailendra.v@samsung.com> (raw)
In-Reply-To: CGME20170127111200epcas3p34bf747c6c3c0da798ddaf34788d1a324@epcas3p3.samsung.com

of_match_device could return NULL, and so can cause a NULL
pointer dereference later.

Signed-off-by: Shailendra Verma <shailendra.v-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index ca22e5e..dbb99cf 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -1082,15 +1082,22 @@ static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
 static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
 			     void *data)
 {
-	const struct of_device_id *of_id =
-			of_match_device(dw_mipi_dsi_dt_ids, dev);
-	const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
+	const struct of_device_id *of_id;
+	const struct dw_mipi_dsi_plat_data *pdata;
 	struct platform_device *pdev = to_platform_device(dev);
 	struct drm_device *drm = data;
 	struct dw_mipi_dsi *dsi;
 	struct resource *res;
 	int ret;
 
+	of_id = of_match_device(dw_mipi_dsi_dt_ids, dev);
+	if (!of_id) {
+		dev_err(dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
+
+	pdata = of_id->data;
+
 	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
 	if (!dsi)
 		return -ENOMEM;
-- 
1.7.9.5

WARNING: multiple messages have this Message-ID (diff)
From: shailendra.v@samsung.com (Shailendra Verma)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Gpu: drm: rockchip - Fix possible NULL derefrence.
Date: Fri, 27 Jan 2017 16:41:50 +0530	[thread overview]
Message-ID: <1485515510-3129-1-git-send-email-shailendra.v@samsung.com> (raw)
In-Reply-To: CGME20170127111200epcas3p34bf747c6c3c0da798ddaf34788d1a324@epcas3p3.samsung.com

of_match_device could return NULL, and so can cause a NULL
pointer dereference later.

Signed-off-by: Shailendra Verma <shailendra.v@samsung.com>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index ca22e5e..dbb99cf 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -1082,15 +1082,22 @@ static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
 static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
 			     void *data)
 {
-	const struct of_device_id *of_id =
-			of_match_device(dw_mipi_dsi_dt_ids, dev);
-	const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
+	const struct of_device_id *of_id;
+	const struct dw_mipi_dsi_plat_data *pdata;
 	struct platform_device *pdev = to_platform_device(dev);
 	struct drm_device *drm = data;
 	struct dw_mipi_dsi *dsi;
 	struct resource *res;
 	int ret;
 
+	of_id = of_match_device(dw_mipi_dsi_dt_ids, dev);
+	if (!of_id) {
+		dev_err(dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
+
+	pdata = of_id->data;
+
 	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
 	if (!dsi)
 		return -ENOMEM;
-- 
1.7.9.5

       reply	other threads:[~2017-01-27 11:42 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20170127111200epcas3p34bf747c6c3c0da798ddaf34788d1a324@epcas3p3.samsung.com>
2017-01-27 11:11 ` Shailendra Verma [this message]
2017-01-27 11:11   ` [PATCH] Gpu: drm: rockchip - Fix possible NULL derefrence Shailendra Verma
2017-01-27 11:11   ` Shailendra Verma
2017-01-27 12:43   ` Corentin Labbe
2017-01-27 12:43     ` Corentin Labbe
2017-01-27 12:43     ` Corentin Labbe

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