From: Johan Hovold <johan@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, Johan Hovold <johan@kernel.org>,
stable <stable@vger.kernel.org>, Won Kang <wkang77@gmail.com>
Subject: [PATCH] staging: gdm724x: gdm_mux: fix use-after-free on module unload
Date: Wed, 26 Apr 2017 12:23:04 +0200 [thread overview]
Message-ID: <20170426102304.28752-1-johan@kernel.org> (raw)
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: stable <stable@vger.kernel.org> # 3.12
Cc: Won Kang <wkang77@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/staging/gdm724x/gdm_mux.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/staging/gdm724x/gdm_mux.c b/drivers/staging/gdm724x/gdm_mux.c
index 400969170d1c..f03e43b1b5f6 100644
--- 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);
--
2.12.2
reply other threads:[~2017-04-26 10:23 UTC|newest]
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