USB: fix dereference in drivers/usb/misc/adutux.c

in two of the error cases, dev is still NULL,
and we dereference it. Spotted by coverity (cid#1428, 1429)

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c
index aecd633fe9f6..af2934e016a7 100644
--- a/drivers/usb/misc/adutux.c
+++ b/drivers/usb/misc/adutux.c
@@ -370,7 +370,8 @@ static int adu_release(struct inode *inode, struct file *file)
         retval = adu_release_internal(dev);
 
 exit:
-        up(&dev->sem);
+        if (dev)
+                up(&dev->sem);
         dbg(2," %s : leave, return value %d", __FUNCTION__, retval);
         return retval;
 }