2016-12-02 10:50:26 +00:00
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From b5dd047d429d99a2e9a567d29df581e21e7ba071 Mon Sep 17 00:00:00 2001
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2016-09-10 12:54:26 +00:00
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From: popcornmix <popcornmix@gmail.com>
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Date: Wed, 7 Sep 2016 16:57:59 +0100
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Subject: [PATCH] fbmem: Ensure that parameters are properly checked within
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fb_copyarea_user
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---
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drivers/video/fbdev/core/fbmem.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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--- a/drivers/video/fbdev/core/fbmem.c
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+++ b/drivers/video/fbdev/core/fbmem.c
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@@ -1090,7 +1090,13 @@ static int fb_copyarea_user(struct fb_in
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int ret = 0;
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if (!lock_fb_info(info))
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return -ENODEV;
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- if (copy->dx + copy->width > info->var.xres ||
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+ if (copy->dx >= info->var.xres ||
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+ copy->sx >= info->var.xres ||
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+ copy->width > info->var.xres ||
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+ copy->dy >= info->var.yres ||
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+ copy->sy >= info->var.yres ||
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+ copy->height > info->var.yres ||
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+ copy->dx + copy->width > info->var.xres ||
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copy->sx + copy->width > info->var.xres ||
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copy->dy + copy->height > info->var.yres ||
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copy->sy + copy->height > info->var.yres) {
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