diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2005-01-06 00:40:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-01-06 00:40:16 -0800 |
| commit | b9b61107f696e231a04f53f3b2ec135db4f666d8 (patch) | |
| tree | 645806c59d71ab7177bfa867f67accd4dfca782c /kernel | |
| parent | 0b064cdf39d4993a7d7651a68adacfa5b7986ac6 (diff) | |
| download | history-b9b61107f696e231a04f53f3b2ec135db4f666d8.tar.gz | |
[PATCH] First cut at setsid/tty locking
Use the existing "tty_sem" to protect against the process tty changes
too.
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/exit.c | 2 | ||||
| -rw-r--r-- | kernel/sys.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index dc7549cd7a5815..54a59c727356ce 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -332,7 +332,9 @@ void daemonize(const char *name, ...) exit_mm(current); set_special_pids(1, 1); + down(&tty_sem); current->signal->tty = NULL; + up(&tty_sem); /* Block and flush all signals */ sigfillset(&blocked); diff --git a/kernel/sys.c b/kernel/sys.c index 1561c2787cc7cb..b6829cea8e0666 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1075,6 +1075,7 @@ asmlinkage long sys_setsid(void) if (!thread_group_leader(current)) return -EINVAL; + down(&tty_sem); write_lock_irq(&tasklist_lock); pid = find_pid(PIDTYPE_PGID, current->pid); @@ -1088,6 +1089,7 @@ asmlinkage long sys_setsid(void) err = process_group(current); out: write_unlock_irq(&tasklist_lock); + up(&tty_sem); return err; } |