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drm: Avoid oops in DRM_IOCTL_RM_DRAW if a bad handle is supplied. 

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Michel Dänzer <michel@tungstengraphics.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Eric Anholt 2008-10-21 11:53:01 -07:00 committed by Dave Airlie
parent 4956887370
commit 7e78f72524
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/drm_drawable.c
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@ -81,6 +81,10 @@ int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
spin_lock_irqsave(&dev->drw_lock, irqflags);
info = drm_get_drawable_info(dev, draw->handle);
if (info == NULL) {
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
return -EINVAL;
}
drm_free(info->rects, info->num_rects * sizeof(struct drm_clip_rect),
DRM_MEM_BUFS);
drm_free(info, sizeof(struct drm_drawable_info), DRM_MEM_BUFS);