From 109751d28cdc230b6498468afdd5bee5a1c95494 Mon Sep 17 00:00:00 2001 From: Poul-Henning Kamp Date: Mon, 27 Jan 2003 16:54:17 +0000 Subject: [PATCH] Don't dereference null vnode pointer if controling terminal was revoked. Submitted by: "Peter Edwards" --- sys/kern/tty_tty.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/sys/kern/tty_tty.c b/sys/kern/tty_tty.c index d962c1884b23..88f4222f404c 100644 --- a/sys/kern/tty_tty.c +++ b/sys/kern/tty_tty.c @@ -70,10 +70,12 @@ ctty_clone(void *arg, char *name, int namelen, dev_t *dev) return; if (strcmp(name, "tty")) return; - if (curthread->td_proc->p_flag & P_CONTROLT) - *dev = curthread->td_proc->p_session->s_ttyvp->v_rdev; - else + if (!(curthread->td_proc->p_flag & P_CONTROLT)) *dev = ctty; + else if (curthread->td_proc->p_session->s_ttyvp == NULL) + *dev = ctty; + else + *dev = curthread->td_proc->p_session->s_ttyvp->v_rdev; } static void