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Subject[PATCH 4.9 30/83] USB: rio500: fix memory leak in close after disconnect
Date
From: Oliver Neukum <oneukum@suse.com>

commit e0feb73428b69322dd5caae90b0207de369b5575 upstream.

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>

---
drivers/usb/misc/rio500.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)

--- a/drivers/usb/misc/rio500.c
+++ b/drivers/usb/misc/rio500.c
@@ -103,9 +103,22 @@ static int close_rio(struct inode *inode
{
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;
}


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