diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2008-10-15 10:52:34 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-15 10:19:51 -0700 |
| commit | 7c3b1dcf13d5660152e02c6dea47b0bd9fd5d871 (patch) | |
| tree | 72965f7aaec65c6822523e77626d733e9957c19d /drivers/char | |
| parent | 6d54aaf389bb47f30fd6567b88665689967be642 (diff) | |
| download | linux-7c3b1dcf13d5660152e02c6dea47b0bd9fd5d871.tar.gz | |
tty: make sure that proc_clear_tty stores the cpu flags
proc_clear_tty() gets called with interrupts off (while holding the task list lock) from sys_setid. This means that it needs the _irqsave version of the locking primitives. Reported-by: Marcin Slusarz <marcin.slusarz@gmail.com> Tested-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tty_io.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 7053d6333692..3f48d88cffc0 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -3032,11 +3032,12 @@ EXPORT_SYMBOL(tty_devnum); void proc_clear_tty(struct task_struct *p) { + unsigned long flags; struct tty_struct *tty; - spin_lock_irq(&p->sighand->siglock); + spin_lock_irqsave(&p->sighand->siglock, flags); tty = p->signal->tty; p->signal->tty = NULL; - spin_unlock_irq(&p->sighand->siglock); + spin_unlock_irqrestore(&p->sighand->siglock, flags); tty_kref_put(tty); } |