1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 0ad32888091c..c3954fbf6ac4 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1815,6 +1815,7 @@ do_it_again:
                         /* FIXME: does n_tty_set_room need locking ? */
                         n_tty_set_room(tty);
                         timeout = schedule_timeout(timeout);
+                        BUG_ON(!tty->read_buf);
                         continue;
                 }
                 __set_current_state(TASK_RUNNING);