[v1] video:fbdev:cobalt_lcdfb:- Handle return NULL error from devm_ioremap
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From: Arvind Yadav <hidden>
Date: 2016-12-13 08:21:19
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lkml
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
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 <redacted> --- drivers/video/fbdev/cobalt_lcdfb.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/video/fbdev/cobalt_lcdfb.c b/drivers/video/fbdev/cobalt_lcdfb.c
index 2d3b691..038ac69 100644
--- a/drivers/video/fbdev/cobalt_lcdfb.c
+++ b/drivers/video/fbdev/cobalt_lcdfb.c@@ -308,6 +308,11 @@ static int cobalt_lcdfb_probe(struct platform_device *dev) info->screen_size = resource_size(res); info->screen_base = devm_ioremap(&dev->dev, res->start, info->screen_size); + if (!info->screen_base) { + framebuffer_release(info); + return -ENOMEM; + } + info->fbops = &cobalt_lcd_fbops; info->fix = cobalt_lcdfb_fix; info->fix.smem_start = res->start;
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2.7.4