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drm/i915/gem: Hook user-extensions upto MMAP_OFFSET_IOCTL

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Call i915_user_extensions() to validate the arg->extensions pointer, and
so return consistent error numbers for the future.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191204162803.3841140-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-12-04 18:06:28 +00:00
parent 780ccb5a5a
commit 126d5de385
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/i915/gem/i915_gem_mman.c
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@ -17,6 +17,7 @@
#include "i915_gem_object.h"
#include "i915_gem_mman.h"
#include "i915_trace.h"
#include "i915_user_extensions.h"
#include "i915_vma.h"
static inline bool
@ -617,9 +618,12 @@ i915_gem_mmap_offset_ioctl(struct drm_device *dev, void *data,
struct drm_i915_private *i915 = to_i915(dev);
struct drm_i915_gem_mmap_offset *args = data;
enum i915_mmap_type type;
int err;
if (args->extensions)
return -EINVAL;
err = i915_user_extensions(u64_to_user_ptr(args->extensions),
NULL, 0, NULL);
if (err)
return err;
switch (args->flags) {
case I915_MMAP_OFFSET_GTT: