From: Johan Hovold johan@kernel.org
commit b6c03e5f7b463efcafd1ce141bd5a8fc4e583ae2 upstream.
If disconnect() races with release() after a process has been interrupted, release() could end up returning early and the driver would fail to free its driver data.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable stable@vger.kernel.org Signed-off-by: Johan Hovold johan@kernel.org Link: https://lore.kernel.org/r/20191010125835.27031-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/misc/legousbtower.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
--- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -419,10 +419,7 @@ static int tower_release (struct inode * goto exit; }
- if (mutex_lock_interruptible(&dev->lock)) { - retval = -ERESTARTSYS; - goto exit; - } + mutex_lock(&dev->lock);
if (dev->open_count != 1) { dev_dbg(&dev->udev->dev, "%s: device not opened exactly once\n",