diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 15f8b3bfd1ee..56737e74b59d 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -4774,6 +4774,16 @@ int drm_mode_create_dumb_ioctl(struct drm_device *dev, if (PAGE_ALIGN(size) == 0) return -EINVAL; + /* + * handle, pitch and size are output parameters. Zero them out to + * prevent drivers from accidentally using uninitialized data. Since + * not all existing userspace is clearing these fields properly we + * cannot reject IOCTL with garbage in them. + */ + args->handle = 0; + args->pitch = 0; + args->size = 0; + return dev->driver->dumb_create(file_priv, dev, args); } |