Fix: common: error query for trigger action protocol error

[lttng-tools.git] / src / common / actions / path.c

diff --git a/src/common/actions/path.c b/src/common/actions/path.c
index 7f4955475aa9775f9001e9a34aebca0e5b864874..4ee649928f646cee1de22306f71e690fc1bac9fa 100644 (file)
--- a/src/common/actions/path.c
+++ b/src/common/actions/path.c
@@ -143,6 +143,13 @@ ssize_t lttng_action_path_create_from_payload(
 
        header = (typeof(header)) header_view.buffer.data;
        consumed_size += header_view.buffer.size;
+
+       /*
+        * An action path of size 0 can exist and represents a trigger with a
+        * single non-list action. Handle it differently since a payload view of
+        * size 0 is considered invalid.
+        */
+       if (header->index_count != 0)
        {
                const struct lttng_payload_view indexes_view =
                                lttng_payload_view_from_view(view,
@@ -161,6 +168,11 @@ ssize_t lttng_action_path_create_from_payload(
                if (!action_path) {
                        goto end;
                }
+       } else {
+               action_path = lttng_action_path_create(NULL, 0);
+               if (!action_path) {
+                       goto end;
+               }
        }
 
        ret = consumed_size;