lkml.org 
[lkml]   [2013]   [Dec]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3.4 28/32] video: kyro: fix incorrect sizes when copying to userspace
Date
3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sasha Levin <sasha.levin@oracle.com>

commit 2ab68ec927310dc488f3403bb48f9e4ad00a9491 upstream.

kyro would copy u32s and specify sizeof(unsigned long) as the size to copy.

This would copy more data than intended and cause memory corruption and might
leak kernel memory.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/video/kyro/fbdev.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/video/kyro/fbdev.c
+++ b/drivers/video/kyro/fbdev.c
@@ -625,15 +625,15 @@ static int kyrofb_ioctl(struct fb_info *
}
break;
case KYRO_IOCTL_UVSTRIDE:
- if (copy_to_user(argp, &deviceInfo.ulOverlayUVStride, sizeof(unsigned long)))
+ if (copy_to_user(argp, &deviceInfo.ulOverlayUVStride, sizeof(deviceInfo.ulOverlayUVStride)))
return -EFAULT;
break;
case KYRO_IOCTL_STRIDE:
- if (copy_to_user(argp, &deviceInfo.ulOverlayStride, sizeof(unsigned long)))
+ if (copy_to_user(argp, &deviceInfo.ulOverlayStride, sizeof(deviceInfo.ulOverlayStride)))
return -EFAULT;
break;
case KYRO_IOCTL_OVERLAY_OFFSET:
- if (copy_to_user(argp, &deviceInfo.ulOverlayOffset, sizeof(unsigned long)))
+ if (copy_to_user(argp, &deviceInfo.ulOverlayOffset, sizeof(deviceInfo.ulOverlayOffset)))
return -EFAULT;
break;
}



\
 
 \ /
  Last update: 2013-12-06 23:41    [W:1.060 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site