From: Dipankar Sarma <dipankar@in.ibm.com>
Fix handling of user bufs (arg), use copy_from_user.
drivers/usb/media/vicam.c | 28 +++++++++++++++++++---------
1 files changed, 19 insertions(+), 9 deletions(-)
diff -puN drivers/usb/media/vicam.c~ds-09-vicam-usercopy-fix drivers/usb/media/vicam.c
--- 25/drivers/usb/media/vicam.c~ds-09-vicam-usercopy-fix 2003-06-11 04:01:14.000000000 -0700
+++ 25-akpm/drivers/usb/media/vicam.c 2003-06-11 04:01:14.000000000 -0700
@@ -611,15 +611,20 @@ vicam_ioctl(struct inode *inode, struct
case VIDIOCSPICT:
{
- struct video_picture *vp = (struct video_picture *) arg;
+ struct video_picture vp;
- DBG("VIDIOCSPICT depth = %d, pal = %d\n", vp->depth,
- vp->palette);
+ if (copy_from_user(&vp, arg, sizeof (vp))) {
+ retval = -EFAULT;
+ break;
+ }
- cam->gain = vp->brightness >> 8;
+ DBG("VIDIOCSPICT depth = %d, pal = %d\n", vp.depth,
+ vp.palette);
- if (vp->depth != 24
- || vp->palette != VIDEO_PALETTE_RGB24)
+ cam->gain = vp.brightness >> 8;
+
+ if (vp.depth != 24
+ || vp.palette != VIDEO_PALETTE_RGB24)
retval = -EINVAL;
break;
@@ -652,10 +657,15 @@ vicam_ioctl(struct inode *inode, struct
case VIDIOCSWIN:
{
- struct video_window *vw = (struct video_window *) arg;
- DBG("VIDIOCSWIN %d x %d\n", vw->width, vw->height);
+ struct video_window vw;
+
+ if (copy_from_user(&vw, arg, sizeof (vw))) {
+ retval = -EFAULT;
+ break;
+ }
+ DBG("VIDIOCSWIN %d x %d\n", vw.width, vw.height);
- if ( vw->width != 320 || vw->height != 240 )
+ if ( vw.width != 320 || vw.height != 240 )
retval = -EFAULT;
break;
_