From a08b43aee46ed4272ad7bee2c785edcf313339b3 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jirislaby@gmail.com>
Date: Wed, 11 Mar 2009 21:47:39 +0100
Subject: [PATCH] USB: misc/vstusb, fix lock imbalance
Make sure we don't leak locked vstdev->lock in vstusb_write. Unlock
properly on one fail path.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/misc/vstusb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/usb/misc/vstusb.c b/drivers/usb/misc/vstusb.c
index 63dff9ba73c5..f26ea8dc1577 100644
--- a/drivers/usb/misc/vstusb.c
+++ b/drivers/usb/misc/vstusb.c
@@ -401,6 +401,7 @@ static ssize_t vstusb_write(struct file *file, const char __user *buffer,
}
if (copy_from_user(buf, buffer, count)) {
+ mutex_unlock(&vstdev->lock);
dev_err(&dev->dev, "%s: can't copy_from_user\n", __func__);
retval = -EFAULT;
goto exit;