drm: only trust core drm ioctls - driver ioctls are a mess.
So driver ioctls need a full auditing before we can make this change.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
index 22957ac1..5641387 100644
--- a/drivers/char/drm/drm_drv.c
+++ b/drivers/char/drm/drm_drv.c
@@ -470,19 +470,18 @@
if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
(nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
- else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE))
+ else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
ioctl = &drm_ioctls[nr];
- else
+ cmd = ioctl->cmd;
+ } else
goto err_i1;
/* Do not trust userspace, use our own definition */
- cmd = ioctl->cmd;
func = ioctl->func;
/* is there a local override? */
if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
func = dev->driver->dma_ioctl;
-
if (!func) {
DRM_DEBUG("no function\n");
retcode = -EINVAL;