If the driver only contains read-only (or write-only) controls, total_vec is empty. In that case return immediately instead of trying to access total_vec[0]. Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> --- utils/v4l2-compliance/v4l2-test-controls.cpp | 2 ++ 1 file changed, 2 insertions(+) diff --git a/utils/v4l2-compliance/v4l2-test-controls.cpp b/utils/v4l2-compliance/v4l2-test-controls.cpp index 735bc5a13c09..2a3f64e8bbec 100644 --- a/utils/v4l2-compliance/v4l2-test-controls.cpp +++ b/utils/v4l2-compliance/v4l2-test-controls.cpp @@ -749,6 +749,8 @@ int testExtendedControls(struct node *node) multiple_classes = true; total_vec.push_back(ctrl); } + if (total_vec.empty()) + return 0; ctrls.count = total_vec.size(); ctrls.controls = &total_vec[0]; -- 2.20.1
