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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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drm/i915: Bail early if we try to mmap an object too large to be mapped.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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@ -1258,6 +1258,7 @@ int
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i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct drm_i915_gem_mmap *args = data;
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struct drm_gem_object *obj;
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loff_t offset;
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@ -1270,6 +1271,11 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
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if (obj == NULL)
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return -ENOENT;
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if (obj->size > dev_priv->mm.gtt_mappable_end) {
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drm_gem_object_unreference_unlocked(obj);
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return -E2BIG;
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}
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offset = args->offset;
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down_write(¤t->mm->mmap_sem);
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@ -1547,6 +1553,7 @@ int
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i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct drm_i915_gem_mmap_gtt *args = data;
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struct drm_gem_object *obj;
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struct drm_i915_gem_object *obj_priv;
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@ -1566,6 +1573,11 @@ i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
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}
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obj_priv = to_intel_bo(obj);
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if (obj->size > dev_priv->mm.gtt_mappable_end) {
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ret = -E2BIG;
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goto unlock;
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}
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if (obj_priv->madv != I915_MADV_WILLNEED) {
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DRM_ERROR("Attempting to mmap a purgeable buffer\n");
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ret = -EINVAL;
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