This is a note to let you know that I've just added the patch titled
staging: gdm724x: gdm_mux: 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:
staging-gdm724x-gdm_mux-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 b58f45c8fc301fe83ee28cad3e64686c19e78f1c Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Wed, 26 Apr 2017 12:23:04 +0200
Subject: staging: gdm724x: gdm_mux: fix use-after-free on module unload
From: Johan Hovold <johan@xxxxxxxxxx>
commit b58f45c8fc301fe83ee28cad3e64686c19e78f1c upstream.
Make sure to deregister the USB driver before releasing the tty driver
to avoid use-after-free in the USB disconnect callback where the tty
devices are deregistered.
Fixes: 61e121047645 ("staging: gdm7240: adding LTE USB driver")
Cc: Won Kang <wkang77@xxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/gdm724x/gdm_mux.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/staging/gdm724x/gdm_mux.c
+++ b/drivers/staging/gdm724x/gdm_mux.c
@@ -664,9 +664,8 @@ static int __init gdm_usb_mux_init(void)
static void __exit gdm_usb_mux_exit(void)
{
- unregister_lte_tty_driver();
-
usb_deregister(&gdm_mux_driver);
+ unregister_lte_tty_driver();
}
module_init(gdm_usb_mux_init);
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.9/usb-serial-ftdi_sio-add-device-id-for-microsemi-arrow-sf2plus-dev-kit.patch
queue-4.9/staging-gdm724x-gdm_mux-fix-use-after-free-on-module-unload.patch