diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-06-19 13:59:46 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-06-22 16:13:23 +0200 |
| commit | 55a9785d125a4dd33678795ccba0ed61a6e8540c (patch) | |
| tree | cb5c454822a3eeb2fba7909839ad31e5412da019 /drivers/gpu/drm/i915/i915_gem_execbuffer.c | |
| parent | 77a0d1cab489eb2b6ebd54234df4262f4840d498 (diff) | |
drm/i915: Enforce execobject.alignment to be a power-of-two
Internal requirement for the alignment is that it must be a
power-of-two, so enforce rejection at the user interface to execbuffer
(which allows the caller to specify a stricter-than-expected alignment
criterion).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_execbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_execbuffer.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index edb8c458cbe1..21f8eb659251 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -957,6 +957,9 @@ validate_exec_list(struct drm_device *dev, if (exec[i].flags & invalid_flags) return -EINVAL; + if (exec[i].alignment && !is_power_of_2(exec[i].alignment)) + return -EINVAL; + /* First check for malicious input causing overflow in * the worst case where we need to allocate the entire * relocation tree as a single array. |