drm: fix the ioctl to not believe userspace.

believing userspace causes oopses

diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 609fc83..b375fa1 100644 (file)
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -631,6 +631,8 @@ long drm_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                goto err_i1;
        }
 #endif
+       cmd = ioctl->cmd;
+
        func = ioctl->func;
        /* is there a local override? */
        if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)