linux-kernel - [PATCH] video: fbdev: grvga.c: Fix for possible null pointer dereference

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Message-Id: <1400621759-7814-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Tue, 20 May 2014 23:35:59 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	Jingoo Han <jg1.han@...sung.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH] video: fbdev: grvga.c:  Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/video/fbdev/grvga.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/grvga.c b/drivers/video/fbdev/grvga.c
index c078701..2db5bb1 100644
--- a/drivers/video/fbdev/grvga.c
+++ b/drivers/video/fbdev/grvga.c
@@ -514,9 +514,10 @@ free_fb:
 static int grvga_remove(struct platform_device *device)
 {
 	struct fb_info *info = dev_get_drvdata(&device->dev);
-	struct grvga_par *par = info->par;
+	struct grvga_par *par;
 
 	if (info) {
+		par = info->par;
 		unregister_framebuffer(info);
 		fb_dealloc_cmap(&info->cmap);
 
-- 
1.7.10.4

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