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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-02-14 12:23:44 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-02-15 01:30:20 +0300 |
| commit | e1c5f754067b594de58d387aa5873dec83b6c9fd (patch) | |
| tree | be71a931e05e3bb7a0de333adfd8e15f62269db6 /drivers/gpu/drm/i915 | |
| parent | 96676fe3a18e61ee2d67992da537d6b68f45df66 (diff) | |
| download | linux-e1c5f754067b594de58d387aa5873dec83b6c9fd.tar.xz | |
drm/i915: Avoid overflow in computing pot_hole loop termination
When using the mock_ppgtt selftest, the GTT is large enough to cause an
overflow in pot_hole() when adding 2 pages to the address. Avoid the
overflow by computing the final valid address and iterating up to that
address.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170214092344.12330-1-chris@chris-wilson.co.uk
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c index 5af9339087b7..468f0992db39 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c @@ -615,7 +615,7 @@ static int pot_hole(struct drm_i915_private *i915, u64 addr; for (addr = round_up(hole_start + I915_GTT_PAGE_SIZE, step) - I915_GTT_PAGE_SIZE; - addr + vma->size <= hole_end; + addr <= round_down(hole_end - 2*I915_GTT_PAGE_SIZE, step) - I915_GTT_PAGE_SIZE; addr += step) { err = i915_vma_pin(vma, 0, 0, addr | flags); if (err) { |