diff options
| author |   Kirill Tkhai <tkhai@yandex.ru> | 2014-04-17 17:47:04 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-05-23 12:16:39 -0300 |
| commit | 9f6be2bc403c0cea8d7b72cd5d42bd1a22b369ed (patch) | |
| tree | 8174f22b98e60fb5d0de5a2c4b1b623902e18f77 /drivers/media/usb/s2255 | |
| parent | [media] fix the code style errors in sn9c102 (diff) | |
| download | wireguard-linux-9f6be2bc403c0cea8d7b72cd5d42bd1a22b369ed.tar.xz wireguard-linux-9f6be2bc403c0cea8d7b72cd5d42bd1a22b369ed.zip | |
[media] s2255: Do not free fw_data until timer handler has actually stopped using it
Function del_timer() does not guarantee that timer was really deleted.
If the timer handler is beeing executed at the moment, the function
does nothing. So, we have a race between del_timer() and kfree(), and
it's possible to use already freed memory in the handler.
Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/usb/s2255')
| -rw-r--r-- | drivers/media/usb/s2255/s2255drv.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/usb/s2255/s2255drv.c b/drivers/media/usb/s2255/s2255drv.c index e019dd63ed42..185be72cab14 100644 --- a/drivers/media/usb/s2255/s2255drv.c +++ b/drivers/media/usb/s2255/s2255drv.c @@ -1521,7 +1521,7 @@ static void s2255_destroy(struct s2255_dev *dev) /* board shutdown stops the read pipe if it is running */ s2255_board_shutdown(dev); /* make sure firmware still not trying to load */ - del_timer(&dev->timer); /* only started in .probe and .open */ + del_timer_sync(&dev->timer); /* only started in .probe and .open */ if (dev->fw_data->fw_urb) { usb_kill_urb(dev->fw_data->fw_urb); usb_free_urb(dev->fw_data->fw_urb); @@ -2351,7 +2351,7 @@ errorREQFW: errorFWDATA2: usb_free_urb(dev->fw_data->fw_urb); errorFWURB: - del_timer(&dev->timer); + del_timer_sync(&dev->timer); errorEP: usb_put_dev(dev->udev); errorUDEV: |