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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-10-16 15:33:28 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-05 16:34:36 -0800 |
| commit | 4ed60fc257185dbb0daea7cd3e4289d1658b11f6 (patch) | |
| tree | 45f256d65961d5b86d33946eda270d401521aab2 | |
| parent | 2622d73e51acfe1dbeb21bf2299066bdead85163 (diff) | |
| download | linux-4ed60fc257185dbb0daea7cd3e4289d1658b11f6.tar.gz linux-4ed60fc257185dbb0daea7cd3e4289d1658b11f6.tar.bz2 linux-4ed60fc257185dbb0daea7cd3e4289d1658b11f6.zip | |
pty: Hold ctrl_lock for packet mode updates
Updates to the packet mode enable require holding the ctrl_lock;
the serialization prevents corruption of adjacent fields.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/pty.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index bcec4c71a408..7a1a53819e22 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -47,7 +47,9 @@ static void pty_close(struct tty_struct *tty, struct file *filp) set_bit(TTY_IO_ERROR, &tty->flags); wake_up_interruptible(&tty->read_wait); wake_up_interruptible(&tty->write_wait); + spin_lock_irq(&tty->ctrl_lock); tty->packet = 0; + spin_unlock_irq(&tty->ctrl_lock); /* Review - krefs on tty_link ?? */ if (!tty->link) return; |