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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>
This commit is contained in:
Oliver Neukum 2019-05-09 11:30:59 +02:00 committed by Greg Kroah-Hartman
parent 3864d33943
commit e0feb73428
1 changed files with 15 additions and 2 deletions
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17
drivers/usb/misc/rio500.c
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@ -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;
}