Commit 3e984ccc authored by Johan Hovold's avatar Johan Hovold Committed by Sasha Levin

serial: ifx6x60: fix use-after-free on module unload

[ Upstream commit 1e948479 ]

Make sure to deregister the SPI driver before releasing the tty driver
to avoid use-after-free in the SPI remove callback where the tty
devices are deregistered.

Fixes: 72d4724e ("serial: ifx6x60: Add modem power off function in the platform reboot process")
Cc: stable <stable@vger.kernel.org>     # 3.8
Cc: Jun Chen <jun.d.chen@intel.com>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 191c13c5
......@@ -1379,9 +1379,9 @@ static struct spi_driver ifx_spi_driver = {
static void __exit ifx_spi_exit(void)
{
/* unregister */
spi_unregister_driver(&ifx_spi_driver);
tty_unregister_driver(tty_drv);
put_tty_driver(tty_drv);
spi_unregister_driver(&ifx_spi_driver);
unregister_reboot_notifier(&ifx_modem_reboot_notifier_block);
}
......
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