diff options
Diffstat (limited to 'sys/kern/tty.c')
| -rw-r--r-- | sys/kern/tty.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/sys/kern/tty.c b/sys/kern/tty.c index ddde7b3..0e352a6 100644 --- a/sys/kern/tty.c +++ b/sys/kern/tty.c @@ -215,7 +215,7 @@ ttydev_leave(struct tty *tp) ttydisc_close(tp); - /* Destroy associated buffers already. */ + /* Free i/o queues now since they might be large. */ ttyinq_free(&tp->t_inq); tp->t_inlow = 0; ttyoutq_free(&tp->t_outq); @@ -1052,10 +1052,15 @@ tty_dealloc(void *arg) { struct tty *tp = arg; - /* Make sure we haven't leaked buffers. */ - MPASS(ttyinq_getsize(&tp->t_inq) == 0); - MPASS(ttyoutq_getsize(&tp->t_outq) == 0); - + /* + * ttyydev_leave() usually frees the i/o queues earlier, but it is + * not always called between queue allocation and here. The queues + * may be allocated by ioctls on a pty control device without the + * corresponding pty slave device ever being open, or after it is + * closed. + */ + ttyinq_free(&tp->t_inq); + ttyoutq_free(&tp->t_outq); seldrain(&tp->t_inpoll); seldrain(&tp->t_outpoll); knlist_destroy(&tp->t_inpoll.si_note); |
