Fix: incorrect close of fd 0 for syscall kernel event destroy

[lttng-tools.git] / src / bin / lttng-sessiond / trace-kernel.c

diff --git a/src/bin/lttng-sessiond/trace-kernel.c b/src/bin/lttng-sessiond/trace-kernel.c
index 36f7c9708a8f47e0fa33d9ce579a33c0bf607e08..68753286fb81c336e5026eb0eb64411ebbd5a81f 100644 (file)
--- a/src/bin/lttng-sessiond/trace-kernel.c
+++ b/src/bin/lttng-sessiond/trace-kernel.c
@@ -321,9 +321,13 @@ void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream)
  */
 void trace_kernel_destroy_event(struct ltt_kernel_event *event)
 {
-       DBG("[trace] Closing event fd %d", event->fd);
-       /* Close kernel fd */
-       close(event->fd);
+       if (event->fd >= 0) {
+               DBG("[trace] Closing event fd %d", event->fd);
+               /* Close kernel fd */
+               close(event->fd);
+       } else {
+               DBG("[trace] Tearing down event (no associated fd)");
+       }
 
        /* Remove from event list */
        cds_list_del(&event->list);