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Apply access control to gem mmap.

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This commit is contained in:
riastradh 2015-03-09 01:29:40 +00:00
parent 07b5668221
commit 2df0a617c4
1 changed files with 6 additions and 3 deletions
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9
sys/external/bsd/drm2/drm/drm_gem_vm.c vendored
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@ -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 @@ drm_gem_mmap_object(struct drm_device *dev, off_t byte_offset, size_t nbytes,
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 @@ drm_gem_mmap_object_locked(struct drm_device *dev, off_t byte_offset,
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);