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Commit 56ea88ec authored by Hans de Goede's avatar Hans de Goede Committed by Greg Kroah-Hartman
Browse files

Bluetooth: hci_uart_set_flow_control: Fix NULL deref when using serdev 




[ Upstream commit 7841d554809b518a22349e7e39b6b63f8a48d0fb ]

Fix a NULL pointer deref (hu->tty) when calling hci_uart_set_flow_control
on hci_uart-s using serdev.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 44ee83c6

drivers/bluetooth/hci_ldisc.c

+7 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ 
#include <linux/ioctl.h>

#include <linux/skbuff.h>

#include <linux/firmware.h>

#include <linux/serdev.h>



#include <net/bluetooth/bluetooth.h>

#include <net/bluetooth/hci_core.h>
@@ -298,6 +299,12 @@ void hci_uart_set_flow_control(struct hci_uart *hu, bool enable) 
	unsigned int set = 0;

	unsigned int clear = 0;



	if (hu->serdev) {

		serdev_device_set_flow_control(hu->serdev, !enable);

		serdev_device_set_rts(hu->serdev, !enable);

		return;

	}



	if (enable) {

		/* Disable hardware flow control */

		ktermios = tty->termios;