Messages in this thread Patch in this message | | | From | Johan Hovold <> | Subject | [PATCH 2/2] USB: legousbtower: fix memleak on disconnect | Date | Thu, 10 Oct 2019 14:58:35 +0200 |
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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> --- drivers/usb/misc/legousbtower.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c index 9d4c52a7ebe0..62dab2441ec4 100644 --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -419,10 +419,7 @@ static int tower_release (struct inode *inode, struct file *file) 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", -- 2.23.0
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