mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-10-01 01:35:54 -04:00
35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From 8835ba4a39cf53f705417b3b3a94eb067673f2c9 Mon Sep 17 00:00:00 2001
|
|
From: Oliver Neukum <oneukum@suse.com>
|
|
Date: Tue, 15 Mar 2016 10:14:04 +0100
|
|
Subject: USB: cdc-acm: more sanity checking
|
|
|
|
An attack has become available which pretends to be a quirky
|
|
device circumventing normal sanity checks and crashes the kernel
|
|
by an insufficient number of interfaces. This patch adds a check
|
|
to the code path for quirky devices.
|
|
|
|
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
|
|
CC: stable@vger.kernel.org
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/usb/class/cdc-acm.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
|
|
index 1d2c99a..83fd30b 100644
|
|
--- a/drivers/usb/class/cdc-acm.c
|
|
+++ b/drivers/usb/class/cdc-acm.c
|
|
@@ -1179,6 +1179,9 @@ static int acm_probe(struct usb_interface *intf,
|
|
if (quirks == NO_UNION_NORMAL) {
|
|
data_interface = usb_ifnum_to_if(usb_dev, 1);
|
|
control_interface = usb_ifnum_to_if(usb_dev, 0);
|
|
+ /* we would crash */
|
|
+ if (!data_interface || !control_interface)
|
|
+ return -ENODEV;
|
|
goto skip_normal_probe;
|
|
}
|
|
|
|
--
|
|
cgit v1.1
|
|
|