diff options
| author | Oliver Neukum <oneukum@suse.com> | 2019-05-09 12:30:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-21 11:11:10 +0300 |
| commit | e0feb73428b69322dd5caae90b0207de369b5575 (patch) | |
| tree | 98591f5bb0f97089148269b2b199013f5056a6e3 | |
| parent | 3864d33943b4a76c6e64616280e98d2410b1190f (diff) | |
| download | linux-e0feb73428b69322dd5caae90b0207de369b5575.tar.xz | |
USB: rio500: fix memory leak in close after disconnect
If a disconnected device is closed, rio_close() must free
the buffers.
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/misc/rio500.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c index 1d397d93d127..a32d61a79ab8 100644 --- a/drivers/usb/misc/rio500.c +++ b/drivers/usb/misc/rio500.c @@ -86,9 +86,22 @@ static int close_rio(struct inode *inode, struct file *file) { struct rio_usb_data *rio = &rio_instance; - rio->isopen = 0; + /* against disconnect() */ + mutex_lock(&rio500_mutex); + mutex_lock(&(rio->lock)); - dev_info(&rio->rio_dev->dev, "Rio closed.\n"); + rio->isopen = 0; + if (!rio->present) { + /* cleanup has been delayed */ + kfree(rio->ibuf); + kfree(rio->obuf); + rio->ibuf = NULL; + rio->obuf = NULL; + } else { + dev_info(&rio->rio_dev->dev, "Rio closed.\n"); + } + mutex_unlock(&(rio->lock)); + mutex_unlock(&rio500_mutex); return 0; } |