diff options
| author | Luiz Fernando Capitulino <lcapitulino@mandriva.com.br> | 2006-05-11 22:34:24 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-05-12 11:58:09 -0700 |
| commit | 71a84163ca6b4e36744978385e94150af32f9d75 (patch) | |
| tree | 2f00bcc4c102660e55c2ff840ce4db6d44ede988 /drivers/usb | |
| parent | 704936a25bda9bb12e35bb222d5e3f26186dc279 (diff) | |
[PATCH] usbserial: Fixes leak in serial_open() error path.
If serial_open() fails at the port assignment or mutex_lock_interruptible()
is interrupted, the 'serial' object will never be freed.
We should call kref_put() when those errors happens.
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index d9dceb4f57b..9c36f0ece20 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -189,11 +189,15 @@ static int serial_open (struct tty_struct *tty, struct file * filp) portNumber = tty->index - serial->minor; port = serial->port[portNumber]; - if (!port) - return -ENODEV; + if (!port) { + retval = -ENODEV; + goto bailout_kref_put; + } - if (mutex_lock_interruptible(&port->mutex)) - return -ERESTARTSYS; + if (mutex_lock_interruptible(&port->mutex)) { + retval = -ERESTARTSYS; + goto bailout_kref_put; + } ++port->open_count; @@ -209,7 +213,7 @@ static int serial_open (struct tty_struct *tty, struct file * filp) * safe because we are called with BKL held */ if (!try_module_get(serial->type->driver.owner)) { retval = -ENODEV; - goto bailout_kref_put; + goto bailout_mutex_unlock; } /* only call the device specific open if this @@ -224,9 +228,10 @@ static int serial_open (struct tty_struct *tty, struct file * filp) bailout_module_put: module_put(serial->type->driver.owner); -bailout_kref_put: +bailout_mutex_unlock: port->open_count = 0; mutex_unlock(&port->mutex); +bailout_kref_put: kref_put(&serial->kref, destroy_serial); return retval; } |