This is a note to let you know that I've just added the patch titled
Input: powermate - fix oops with malicious USB descriptors
to the 4.5-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:
input-powermate-fix-oops-with-malicious-usb-descriptors.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9c6ba456711687b794dcf285856fc14e2c76074f Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
Date: Mon, 14 Mar 2016 09:33:40 -0700
Subject: Input: powermate - fix oops with malicious USB descriptors
From: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
commit 9c6ba456711687b794dcf285856fc14e2c76074f upstream.
The powermate driver expects at least one valid USB endpoint in its
probe function. If given malicious descriptors that specify 0 for
the number of endpoints, it will crash. Validate the number of
endpoints on the interface before using them.
The full report for this issue can be found here:
http://seclists.org/bugtraq/2016/Mar/85
Reported-by: Ralf Spenneberg <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/input/misc/powermate.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/input/misc/powermate.c
+++ b/drivers/input/misc/powermate.c
@@ -307,6 +307,9 @@ static int powermate_probe(struct usb_in
int error = -ENOMEM;
interface = intf->cur_altsetting;
+ if (interface->desc.bNumEndpoints < 1)
+ return -EINVAL;
+
endpoint = &interface->endpoint[0].desc;
if (!usb_endpoint_is_int_in(endpoint))
return -EIO;
Patches currently in stable-queue which might be from jwboyer@xxxxxxxxxxxxxxxxx are
queue-4.5/usb-serial-ftdi_sio-add-support-for-icp-das-i-756xu-devices.patch
queue-4.5/input-powermate-fix-oops-with-malicious-usb-descriptors.patch
queue-4.5/perf-tools-fix-python-extension-build.patch
queue-4.5/usb-iowarrior-fix-oops-with-malicious-usb-descriptors.patch
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