diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 0bece97547d4..d417de354d9d 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -81,6 +81,9 @@ cifs_ses_get_chan_index(struct cifs_ses *ses,
 	}
 
 	/* If we didn't find the channel, it is likely a bug */
+	if (server)
+		cifs_dbg(VFS, "unable to get chan index for server: 0x%llx",
+			 server->conn_id);
 	WARN_ON(1);
 	return 0;
 }