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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-09-14 16:14:28 +0400 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-10-21 01:11:19 +0400 |
| commit | 8ffc02468145ac92b1b88896e0f18bd7bcd52591 (patch) | |
| tree | adb0d1d1343b8ca93dec9bf95a5263455371654a /include/linux/io-mapping.h | |
| parent | 6dacfd2faa398dc5206523ae6a2f8dd037488de8 (diff) | |
| download | linux-8ffc02468145ac92b1b88896e0f18bd7bcd52591.tar.xz | |
drm/i915: Defend against userspace creating a gem object with size==0
We currently only round up the userspace size to the next page. We
assume that userspace hasn't made a mistake and requested a zero-length
gem object and all through our internal code we then presume that every
object is backed by at least a single page. Fix that oversight and
report EINVAL back to userspace if they try to create a zero length
object.
[danvet: This fixes tests/gem_bad_length]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'include/linux/io-mapping.h')
0 files changed, 0 insertions, 0 deletions