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-rw-r--r--linux-core/drm_vm.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index 771c11bd..d17a1370 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -377,6 +377,8 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
DRM_DEBUG("start = 0x%lx, end = 0x%lx, offset = 0x%lx\n",
vma->vm_start, vma->vm_end, VM_OFFSET(vma));
+ if ( !priv->authenticated ) return -EACCES;
+
if (!VM_OFFSET(vma)) return DRM(mmap_dma)(filp, vma);
/* A sequential search of a linked list is