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authorMikko Rapeli <mikko.rapeli@iki.fi>2007-07-11 09:18:15 +0200
committerMarcel Holtmann <marcel@holtmann.org>2007-07-11 07:01:26 +0200
commit84950cf0ba02fd6a5defe2511bc41f9aa2237632 (patch)
treee6c6d6b243d8c8d5bafdaa9d2054458409b17c82 /net
parent924f0e4a06419fa1996425d1d2512030e43acbba (diff)
[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 <alan@lxorguk.ukuu.org.uk> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/rfcomm/tty.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index b2b1cceb102..ba469b038ea 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;