diff options
author | Johan Hovold <jhovold@gmail.com> | 2014-05-26 19:22:51 +0200 |
---|---|---|
committer | Jiri Slaby <jslaby@suse.cz> | 2014-07-02 12:06:21 +0200 |
commit | 06974d798d13f913e2ca85cedba76df8fabb72dd (patch) | |
tree | b0244548a00a03114e6d79fa4b73ad2b14316f7c /drivers | |
parent | 8ae7a23bb2f7b01e10f99dbd9b63b9bdca82dd79 (diff) |
USB: sierra: fix use after free at suspend/resume
commit 8452727de70f6ad850cd6d0aaa18b5d9050aa63b upstream.
Fix use after free or NULL-pointer dereference during suspend and
resume.
The port data may never have been allocated (port probe failed)
or may already have been released by port_remove (e.g. driver is
unloaded) when suspend and resume are called.
Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while
online")
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/usb/serial/sierra.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index b3f2b60465b..efdb76a7b78 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -941,6 +941,7 @@ static int sierra_port_remove(struct usb_serial_port *port) struct sierra_port_private *portdata; portdata = usb_get_serial_port_data(port); + usb_set_serial_port_data(port, NULL); kfree(portdata); return 0; @@ -957,6 +958,8 @@ static void stop_read_write_urbs(struct usb_serial *serial) for (i = 0; i < serial->num_ports; ++i) { port = serial->port[i]; portdata = usb_get_serial_port_data(port); + if (!portdata) + continue; sierra_stop_rx_urbs(port); usb_kill_anchored_urbs(&portdata->active); } @@ -999,6 +1002,9 @@ static int sierra_resume(struct usb_serial *serial) port = serial->port[i]; portdata = usb_get_serial_port_data(port); + if (!portdata) + continue; + while ((urb = usb_get_from_anchor(&portdata->delayed))) { usb_anchor_urb(urb, &portdata->active); intfdata->in_flight++; |