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From: Markus Elfring <Markus.Elfring@web.de>
To: dri-devel@lists.freedesktop.org, kernel@pengutronix.de,
	linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com,
	Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
	Fabio Estevam <festevam@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Shawn Guo <shawnguo@kernel.org>,
	Navid Emamdoost <navid.emamdoost@gmail.com>,
	Peter Senna Tschudin <peter.senna@collabora.com>
Cc: Rob Herring <robh@kernel.org>,
	kernel-janitors@vger.kernel.org, Kangjie Lu <kjlu@umn.edu>,
	LKML <linux-kernel@vger.kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Stephen McCamant <smccaman@umn.edu>,
	Navid Emamdoost <emamd001@umn.edu>
Subject: [PATCH 2/2] drm/imx: Fix error handling for a kmemdup() call in imx_ldb_panel_ddc()
Date: Sat, 12 Oct 2019 11:10:07 +0200
Message-ID: <d35e4483-e310-c5b8-467e-a6a51f49dfef@web.de> (raw)
In-Reply-To: <2abf545b-023b-853a-95ef-ce99e1896a5d@web.de>

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 12 Oct 2019 10:33:47 +0200

The return value from a call of the function “kmemdup” was not checked
in this function implementation. Thus add the corresponding error handling.

This issue was detected by using the Coccinelle software.

Fixes: dc80d7038883feca2abd08975165bc0d83c84762 ("drm/imx-ldb: Add support to drm-bridge")
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/gpu/drm/imx/imx-ldb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index 208069faf183..801a2265dd11 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -569,6 +569,8 @@ static int imx_ldb_panel_ddc(struct device *dev,
 			channel->edid = kmemdup(edidp,
 						channel->edid_len,
 						GFP_KERNEL);
+			if (!channel->edid)
+				return -ENOMEM;
 		} else if (!channel->panel) {
 			/* fallback to display-timings node */
 			ret = of_get_drm_display_mode(child,
--
2.23.0


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      parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-04 19:09 [PATCH] drm/imx: fix memory leak in imx_pd_bind Navid Emamdoost
2019-10-05 15:02 ` Markus Elfring
2019-10-12 11:54   ` Markus Elfring
2019-10-12 19:22     ` Navid Emamdoost
2019-10-06  9:33 ` drm/imx: Checking a kmemdup() call in imx_pd_bind() Markus Elfring
2019-10-07  4:26   ` Navid Emamdoost
2019-10-07  7:44     ` Markus Elfring
2019-10-12  9:04     ` [PATCH 0/2] drm/imx: Adjustments for two functions Markus Elfring
2019-10-12  9:07       ` [PATCH 1/2] drm/imx: Fix error handling for a kmemdup() call in imx_pd_bind() Markus Elfring
2019-10-12 19:16         ` Navid Emamdoost
2019-10-12 19:24           ` Julia Lawall
2019-10-12  9:10       ` Markus Elfring [this message]

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