cve/published/2022/CVE-2022-48926.mbox

From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: <linux-cve-announce@vger.kernel.org>
Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org>
Subject: CVE-2022-48926: usb: gadget: rndis: add spinlock for rndis response list

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

usb: gadget: rndis: add spinlock for rndis response list

There's no lock for rndis response list. It could cause list corruption
if there're two different list_add at the same time like below.
It's better to add in rndis_add_response / rndis_free_response
/ rndis_get_next_response to prevent any race condition on response list.

[  361.894299] [1:   irq/191-dwc3:16979] list_add corruption.
next->prev should be prev (ffffff80651764d0),
but was ffffff883dc36f80. (next=ffffff80651764d0).

[  361.904380] [1:   irq/191-dwc3:16979] Call trace:
[  361.904391] [1:   irq/191-dwc3:16979]  __list_add_valid+0x74/0x90
[  361.904401] [1:   irq/191-dwc3:16979]  rndis_msg_parser+0x168/0x8c0
[  361.904409] [1:   irq/191-dwc3:16979]  rndis_command_complete+0x24/0x84
[  361.904417] [1:   irq/191-dwc3:16979]  usb_gadget_giveback_request+0x20/0xe4
[  361.904426] [1:   irq/191-dwc3:16979]  dwc3_gadget_giveback+0x44/0x60
[  361.904434] [1:   irq/191-dwc3:16979]  dwc3_ep0_complete_data+0x1e8/0x3a0
[  361.904442] [1:   irq/191-dwc3:16979]  dwc3_ep0_interrupt+0x29c/0x3dc
[  361.904450] [1:   irq/191-dwc3:16979]  dwc3_process_event_entry+0x78/0x6cc
[  361.904457] [1:   irq/191-dwc3:16979]  dwc3_process_event_buf+0xa0/0x1ec
[  361.904465] [1:   irq/191-dwc3:16979]  dwc3_thread_interrupt+0x34/0x5c

The Linux kernel CVE team has assigned CVE-2022-48926 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 4.9.304 with commit 9f5d8ba538ef81cd86ea587ca3f8c77e26bea405
	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 4.14.269 with commit 669c2b178956718407af5631ccbc61c24413f038
	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 4.19.232 with commit 9f688aadede6b862a0a898792b1a35421c93636f
	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 5.4.182 with commit 9ab652d41deab49848673c3dadb57ad338485376
	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 5.10.103 with commit 4ce247af3f30078d5b97554f1ae6200a0222c15a
	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 5.15.26 with commit da514063440b53a27309a4528b726f92c3cfe56f
	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 5.16.12 with commit 33222d1571d7ce8c1c75f6b488f38968fa93d2d9
	Issue introduced in 4.6 with commit f6281af9d62e128aa6efad29cf7265062af114f2 and fixed in 5.17 with commit aaaba1c86d04dac8e49bf508b492f81506257da3

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2022-48926
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/usb/gadget/function/rndis.c
	drivers/usb/gadget/function/rndis.h


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/9f5d8ba538ef81cd86ea587ca3f8c77e26bea405
	https://git.kernel.org/stable/c/669c2b178956718407af5631ccbc61c24413f038
	https://git.kernel.org/stable/c/9f688aadede6b862a0a898792b1a35421c93636f
	https://git.kernel.org/stable/c/9ab652d41deab49848673c3dadb57ad338485376
	https://git.kernel.org/stable/c/4ce247af3f30078d5b97554f1ae6200a0222c15a
	https://git.kernel.org/stable/c/da514063440b53a27309a4528b726f92c3cfe56f
	https://git.kernel.org/stable/c/33222d1571d7ce8c1c75f6b488f38968fa93d2d9
	https://git.kernel.org/stable/c/aaaba1c86d04dac8e49bf508b492f81506257da3