rbd-mirror: potential nullptr dereference in ImageReplayer::handle_start_replay

Signed-off-by: Mykola Golub <mgolub@suse.com>

diff --git a/src/tools/rbd_mirror/ImageReplayer.cc b/src/tools/rbd_mirror/ImageReplayer.cc
index cc419f58da3b883285eb49fd01738eb77d3134cc..96e7e83a59fca9641d1fd2a79b5e00d6128a9503 100644 (file)
--- a/src/tools/rbd_mirror/ImageReplayer.cc
+++ b/src/tools/rbd_mirror/ImageReplayer.cc
@@ -639,7 +639,9 @@ void ImageReplayer<I>::handle_start_replay(int r) {
   reschedule_update_status_task(30);
 
   if (on_replay_interrupted()) {
-    on_finish->complete(r);
+    if (on_finish != nullptr) {
+      on_finish->complete(r);
+    }
     return;
   }