diff options
| -rw-r--r-- | sys/kern/kern_exit.c | 2 | ||||
| -rw-r--r-- | sys/kern/tty.c | 9 |
2 files changed, 7 insertions, 4 deletions
diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 37d0254..673707f 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -309,7 +309,7 @@ exit1(struct thread *td, int rv) sp->s_ttyvp = NULL; SESS_UNLOCK(sp); - if (ttyvp != NULL) { + if (ttyvp != NULL && ttyvp->v_type != VBAD) { /* * Controlling process. * Signal foreground pgrp and revoke access to diff --git a/sys/kern/tty.c b/sys/kern/tty.c index 162ae37..bf800be 100644 --- a/sys/kern/tty.c +++ b/sys/kern/tty.c @@ -1487,15 +1487,18 @@ tty_generic_ioctl(struct tty *tp, u_long cmd, void *data, struct thread *td) } if (p->p_session->s_ttyvp != NULL || - (tp->t_session != NULL && tp->t_session->s_ttyvp != NULL)) { + (tp->t_session != NULL && tp->t_session->s_ttyvp != NULL && + tp->t_session->s_ttyvp->v_type != VBAD)) { /* * There is already a relation between a TTY and * a session, or the caller is not the session * leader. * * Allow the TTY to be stolen when the vnode is - * NULL, but the reference to the TTY is still - * active. + * invalid, but the reference to the TTY is + * still active. This allows immediate reuse of + * TTYs of which the session leader has been + * killed or the TTY revoked. */ sx_xunlock(&proctree_lock); return (EPERM); |
