Commit 93794239 authored Dec 13, 2016 by Arvind Yadav Committed by Greg Kroah-Hartman Aug 06, 2017

video: fbdev: cobalt_lcdfb: Handle return NULL error from devm_ioremap




[ Upstream commit 4dcd19bfabaee8f9f4bcf203afba09b98ccbaf76 ]

Here, If devm_ioremap will fail. It will return NULL.
Kernel can run into a NULL-pointer dereference.
This error check will avoid NULL pointer dereference.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Yoichi Yuasa <yuasa@linux-mips.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 1286e959

drivers/video/fbdev/cobalt_lcdfb.c

+5 −0

Original line number	Original line	Diff line number	Diff line
	@@ -350,6 +350,11 @@ static int cobalt_lcdfb_probe(struct platform_device *dev)
	info->screen_size = resource_size(res);		info->screen_size = resource_size(res);
	info->screen_base = devm_ioremap(&dev->dev, res->start,		info->screen_base = devm_ioremap(&dev->dev, res->start,
	info->screen_size);		info->screen_size);
			if (!info->screen_base) {
			framebuffer_release(info);
			return -ENOMEM;
			}

	info->fbops = &cobalt_lcd_fbops;		info->fbops = &cobalt_lcd_fbops;
	info->fix = cobalt_lcdfb_fix;		info->fix = cobalt_lcdfb_fix;
	info->fix.smem_start = res->start;		info->fix.smem_start = res->start;