linux-kernel - [ 067/180] Bluetooth: add NULL pointer check in HCI

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Message-Id: <20121001225200.447394714@1wt.eu>
Date:	Tue, 02 Oct 2012 00:53:04 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Jun Nie <njun@...vell.com>,
	"Gustavo F. Padovan" <padovan@...fusion.mobi>,
	Willy Tarreau <w@....eu>
Subject: [ 067/180] Bluetooth: add NULL pointer check in HCI

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Jun Nie <njun@...vell.com>

commit d9319560b86839506c2011346b1f2e61438a3c73 upstream.

If we fail to find a hci device pointer in hci_uart, don't try
to deref the NULL one we do have.

Signed-off-by: Jun Nie <njun@...vell.com>
Signed-off-by: Gustavo F. Padovan <padovan@...fusion.mobi>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/bluetooth/hci_ldisc.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index e3d4eda..e6f67b6 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -313,8 +313,10 @@ static void hci_uart_tty_close(struct tty_struct *tty)
 
 		if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
 			hu->proto->close(hu);
-			hci_unregister_dev(hdev);
-			hci_free_dev(hdev);
+			if (hdev) {
+				hci_unregister_dev(hdev);
+				hci_free_dev(hdev);
+			}
 		}
 	}
 }
-- 
1.7.2.1.45.g54fbc



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