redonkable/alistair23-linux
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drm/i915: Catch dirt in unused execbuffer fields

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We need to make sure that userspace keeps on following the contract,
otherwise we won't be able to use the reserved fields at all.

v2: Add DRM_DEBUG (Chris)

Testcase: igt/gem_exec_params/*-dirt
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2014-04-24 08:09:11 +02:00
parent c0f5b82cd1
commit 9cb346648d
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/i915/i915_gem_execbuffer.c
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@ -1123,6 +1123,11 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
ret = -EFAULT;
goto pre_mutex_err;
}
} else {
if (args->DR1 || args->DR4 || args->cliprects_ptr) {
DRM_DEBUG("0 cliprects but dirt in cliprects fields\n");
return -EINVAL;
}
}
intel_runtime_pm_get(dev_priv);
@ -1400,6 +1405,11 @@ i915_gem_execbuffer2(struct drm_device *dev, void *data,
return -EINVAL;
}
if (args->rsvd2 != 0) {
DRM_DEBUG("dirty rvsd2 field\n");
return -EINVAL;
}
exec2_list = kmalloc(sizeof(*exec2_list)*args->buffer_count,
GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
if (exec2_list == NULL)