| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.11 103/114] Bluetooth: hci_bcm: add missing tty-device sanity check | Date | Thu, 18 May 2017 12:46:53 +0200 |
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4.11-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold <johan@kernel.org>
commit 95065a61e9bf25fb85295127fba893200c2bbbd8 upstream.
Make sure to check the tty-device pointer before looking up the sibling platform device to avoid dereferencing a NULL-pointer when the tty is one end of a Unix98 pty.
Fixes: 0395ffc1ee05 ("Bluetooth: hci_bcm: Add PM for BCM devices") Cc: Frederic Danis <frederic.danis@linux.intel.com> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/bluetooth/hci_bcm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -287,6 +287,9 @@ static int bcm_open(struct hci_uart *hu) hu->priv = bcm; + if (!hu->tty->dev) + goto out; + mutex_lock(&bcm_device_lock); list_for_each(p, &bcm_device_list) { struct bcm_device *dev = list_entry(p, struct bcm_device, list); @@ -307,7 +310,7 @@ static int bcm_open(struct hci_uart *hu) } mutex_unlock(&bcm_device_lock); - +out: return 0; }
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