bluetooth rfcomm tty: destroy before tty_close()

rfcomm dev could be deleted in tty_hangup, so we must not call
rfcomm_dev_del again to prevent from destroying rfcomm dev before tty
close.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 788c70321858..e4c779bb8d76 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -429,7 +429,8 @@ static int rfcomm_release_dev(void __user *arg)
         if (dev->tty)
                 tty_vhangup(dev->tty);
 
-        rfcomm_dev_del(dev);
+        if (!test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags))
+                rfcomm_dev_del(dev);
         rfcomm_dev_put(dev);
         return 0;
 }