cve/published/2022/CVE-2022-49235.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-2022-49235: ath9k_htc: fix uninit value bugs

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

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

ath9k_htc: fix uninit value bugs

Syzbot reported 2 KMSAN bugs in ath9k. All of them are caused by missing
field initialization.

In htc_connect_service() svc_meta_len and pad are not initialized. Based
on code it looks like in current skb there is no service data, so simply
initialize svc_meta_len to 0.

htc_issue_send() does not initialize htc_frame_hdr::control array. Based
on firmware code, it will initialize it by itself, so simply zero whole
array to make KMSAN happy

Fail logs:

BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline]
 hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479
 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline]
 htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275
...

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:3251 [inline]
 __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x545/0xf90 net/core/skbuff.c:426
 alloc_skb include/linux/skbuff.h:1126 [inline]
 htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258
...

Bytes 4-7 of 18 are uninitialized
Memory access of size 18 starts at ffff888027377e00

BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430
 hif_usb_send_regout drivers/net/wireless/ath/ath9k/hif_usb.c:127 [inline]
 hif_usb_send+0x5f0/0x16f0 drivers/net/wireless/ath/ath9k/hif_usb.c:479
 htc_issue_send drivers/net/wireless/ath/ath9k/htc_hst.c:34 [inline]
 htc_connect_service+0x143e/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:275
...

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:3251 [inline]
 __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x545/0xf90 net/core/skbuff.c:426
 alloc_skb include/linux/skbuff.h:1126 [inline]
 htc_connect_service+0x1029/0x1960 drivers/net/wireless/ath/ath9k/htc_hst.c:258
...

Bytes 16-17 of 18 are uninitialized
Memory access of size 18 starts at ffff888027377e00

The Linux kernel CVE team has assigned CVE-2022-49235 to this issue.


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

	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 4.9.311 with commit 5c2a6a8daa17a3f65b38b9a5574bb362c13fa1d9
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 4.14.276 with commit e352acdd378e9263cc4c6018e588f2dac7161d07
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 4.19.238 with commit ee4222052a76559c20e821bc3519cefb58b6d3e9
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.4.189 with commit 4d244b731188e0b63fc40a9d2dec72e9181fb37c
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.10.110 with commit 11f11ac281f0c0b363d2940204f28bae0422ed71
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.15.33 with commit 0b700f7d06492de34964b6f414120043364f8191
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.16.19 with commit 7da6169b6ebb75816b57be3beb829afa74f3b4b6
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.17.2 with commit 5abf2b761b998063f5e2bae93fd4ab10e2a80f10
	Issue introduced in 2.6.35 with commit fb9987d0f748c983bb795a86f47522313f701a08 and fixed in 5.18 with commit d1e0df1c57bd30871dd1c855742a7c346dbca853

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-2022-49235
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/net/wireless/ath/ath9k/htc_hst.c


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/5c2a6a8daa17a3f65b38b9a5574bb362c13fa1d9
	https://git.kernel.org/stable/c/e352acdd378e9263cc4c6018e588f2dac7161d07
	https://git.kernel.org/stable/c/ee4222052a76559c20e821bc3519cefb58b6d3e9
	https://git.kernel.org/stable/c/4d244b731188e0b63fc40a9d2dec72e9181fb37c
	https://git.kernel.org/stable/c/11f11ac281f0c0b363d2940204f28bae0422ed71
	https://git.kernel.org/stable/c/0b700f7d06492de34964b6f414120043364f8191
	https://git.kernel.org/stable/c/7da6169b6ebb75816b57be3beb829afa74f3b4b6
	https://git.kernel.org/stable/c/5abf2b761b998063f5e2bae93fd4ab10e2a80f10
	https://git.kernel.org/stable/c/d1e0df1c57bd30871dd1c855742a7c346dbca853