[PATCH v4 04/11] drm/i915/gvt: filter cmds "lrr-src" and "lrr-dst" in cmd_handler

[Yan Zhao]

do not allow "lrr-src" and "lrr-dst"

Cc: Colin Xu <colin.xu at intel.com>
Cc: Kevin Tian <kevin.tian at intel.com>

Signed-off-by: Yan Zhao <yan.y.zhao at intel.com>
---
 drivers/gpu/drm/i915/gvt/cmd_parser.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index d008da48f998..89d4d5ddb07e 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -991,6 +991,12 @@ static int cmd_reg_handler(struct parser_exec_state *s,
 			return 0;
 	}
 
+	if (!strncmp(cmd, "lrr-src", 7) ||
+			!strncmp(cmd, "lrr-dst", 7)) {
+		gvt_vgpu_err("not allowed cmd %s\n", cmd);
+		return -EPERM;
+	}
+
 	if (is_cmd_update_pdps(offset, s) &&
 	    cmd_pdp_mmio_update_handler(s, offset, index))
 		return -EINVAL;
-- 
2.17.1