This is a note to let you know that I've just added the patch titled
serial: ifx6x60: fix use-after-free on module unload
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-ifx6x60-fix-use-after-free-on-module-unload.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1e948479b3d63e3ac0ecca13cbf4921c7d17c168 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Wed, 26 Apr 2017 12:24:21 +0200
Subject: serial: ifx6x60: fix use-after-free on module unload
From: Johan Hovold <johan@xxxxxxxxxx>
commit 1e948479b3d63e3ac0ecca13cbf4921c7d17c168 upstream.
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: 72d4724ea54c ("serial: ifx6x60: Add modem power off function in the platform reboot process")
Cc: Jun Chen <jun.d.chen@xxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/ifx6x60.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -1381,9 +1381,9 @@ 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);
}
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.9/serial-ifx6x60-fix-use-after-free-on-module-unload.patch