[src/trunk]: src/sys/external/bsd/drm2/drm Apply access control to gem mmap.

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3a9d9d9bddb2
branches:  trunk
changeset: 336661:3a9d9d9bddb2
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Mar 09 01:29:40 2015 +0000

description:
Apply access control to gem mmap.

diffstat:

 sys/external/bsd/drm2/drm/drm_gem_vm.c |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (37 lines):

diff -r 3d7efc556b7e -r 3a9d9d9bddb2 sys/external/bsd/drm2/drm/drm_gem_vm.c
--- a/sys/external/bsd/drm2/drm/drm_gem_vm.c    Mon Mar 09 01:07:27 2015 +0000
+++ b/sys/external/bsd/drm2/drm/drm_gem_vm.c    Mon Mar 09 01:29:40 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: drm_gem_vm.c,v 1.5 2014/07/26 21:15:45 riastradh Exp $ */
+/*     $NetBSD: drm_gem_vm.c,v 1.6 2015/03/09 01:29:40 riastradh Exp $ */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: drm_gem_vm.c,v 1.5 2014/07/26 21:15:45 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: drm_gem_vm.c,v 1.6 2015/03/09 01:29:40 riastradh Exp $");
 
 #include <sys/types.h>
 
@@ -95,7 +95,7 @@
 static int
 drm_gem_mmap_object_locked(struct drm_device *dev, off_t byte_offset,
     size_t nbytes, int prot __unused, struct uvm_object **uobjp,
-    voff_t *uoffsetp, struct file *file __unused)
+    voff_t *uoffsetp, struct file *file)
 {
        const unsigned long startpage = (byte_offset >> PAGE_SHIFT);
        const unsigned long npages = (nbytes >> PAGE_SHIFT);
@@ -118,6 +118,9 @@
                return 0;
        }
 
+       if (!drm_vma_node_is_allowed(node, file))
+               return -EACCES;
+
        struct drm_gem_object *const obj = container_of(node,
            struct drm_gem_object, vma_node);
        KASSERT(obj->dev == dev);