linux-kernel - [BUG] Buffer Overflow in drivers/video/fbmem.c

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Message-ID: <CABVvea3mENMUqUtb2OGUN+vXqMVPVEgtna4w56gT1dh7gh7r7Q@mail.gmail.com>
Date:	Mon, 23 Sep 2013 19:32:04 +0800
From:	徐永健 <xuyongjiande@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [BUG] Buffer Overflow in drivers/video/fbmem.c

Hi,
Buffer overflow found in drivers/video/fbmem.c.
[Version]:Newest

[Detail]:
1592 static int do_register_framebuffer(struct fb_info *fb_info)
1593 {
1594 |   int i;
1595 |   struct fb_event event;
1596 |   struct fb_videomode mode;
........
1607 |   num_registered_fb++;
1608 |   for (i = 0 ; i < FB_MAX; i++)    //******* i could be FB_MAX
after loop *********/
1609 |   |   if (!registered_fb[i])
1610 |   |   |   break;
........

1646 |   fb_var_to_videomode(&mode, &fb_info->var);
1647 |   fb_add_videomode(&mode, &fb_info->modelist);
1648 |   registered_fb[i] = fb_info;          // ****** Here will be a
off-by-one overflow  *******/
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