From 84950cf0ba02fd6a5defe2511bc41f9aa2237632 Mon Sep 17 00:00:00 2001 From: Mikko Rapeli Date: Wed, 11 Jul 2007 09:18:15 +0200 Subject: [PATCH] [Bluetooth] Hangup TTY before releasing rfcomm_dev The core problem is that RFCOMM socket layer ioctl can release rfcomm_dev struct while RFCOMM TTY layer is still actively using it. Calling tty_vhangup() is needed for a synchronous hangup before rfcomm_dev is freed. Addresses the oops at http://bugzilla.kernel.org/show_bug.cgi?id=7509 Acked-by: Alan Cox Signed-off-by: Marcel Holtmann --- net/bluetooth/rfcomm/tty.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index b2b1cceb102a..ba469b038ea0 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -383,6 +383,10 @@ static int rfcomm_release_dev(void __user *arg) if (req.flags & (1 << RFCOMM_HANGUP_NOW)) rfcomm_dlc_close(dev->dlc, 0); + /* Shut down TTY synchronously before freeing rfcomm_dev */ + if (dev->tty) + tty_vhangup(dev->tty); + rfcomm_dev_del(dev); rfcomm_dev_put(dev); return 0; -- 2.20.1