linux-cve-announce - CVE-2022-49515: ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element

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Message-ID: <2025022610-CVE-2022-49515-61ba@gregkh>
Date: Wed, 26 Feb 2025 03:13:09 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49515: ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t

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

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

ASoC: cs35l41: Fix an out-of-bounds access in otp_packed_element_t

The CS35L41_NUM_OTP_ELEM is 100, but only 99 entries are defined in
the array otp_map_1/2[CS35L41_NUM_OTP_ELEM], this will trigger UBSAN
to report a shift-out-of-bounds warning in the cs35l41_otp_unpack()
since the last entry in the array will result in GENMASK(-1, 0).

UBSAN reports this problem:
 UBSAN: shift-out-of-bounds in /home/hwang4/build/jammy/jammy/sound/soc/codecs/cs35l41-lib.c:836:8
 shift exponent 64 is too large for 64-bit type 'long unsigned int'
 CPU: 10 PID: 595 Comm: systemd-udevd Not tainted 5.15.0-23-generic #23
 Hardware name: LENOVO \x02MFG_IN_GO/\x02MFG_IN_GO, BIOS N3GET19W (1.00 ) 03/11/2022
 Call Trace:
  <TASK>
  show_stack+0x52/0x58
  dump_stack_lvl+0x4a/0x5f
  dump_stack+0x10/0x12
  ubsan_epilogue+0x9/0x45
  __ubsan_handle_shift_out_of_bounds.cold+0x61/0xef
  ? regmap_unlock_mutex+0xe/0x10
  cs35l41_otp_unpack.cold+0x1c6/0x2b2 [snd_soc_cs35l41_lib]
  cs35l41_hda_probe+0x24f/0x33a [snd_hda_scodec_cs35l41]
  cs35l41_hda_i2c_probe+0x65/0x90 [snd_hda_scodec_cs35l41_i2c]
  ? cs35l41_hda_i2c_remove+0x20/0x20 [snd_hda_scodec_cs35l41_i2c]
  i2c_device_probe+0x252/0x2b0

The Linux kernel CVE team has assigned CVE-2022-49515 to this issue.

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

	Issue introduced in 5.16 with commit 6450ef55905688602175fae4ed1bfbfef6a14dde and fixed in 5.17.14 with commit dbc35268e14d5d89c7a9db72009ad4dcd9ede646
	Issue introduced in 5.16 with commit 6450ef55905688602175fae4ed1bfbfef6a14dde and fixed in 5.18.3 with commit a59b9958416096dd21dc4f62b0c5be525d459ca8
	Issue introduced in 5.16 with commit 6450ef55905688602175fae4ed1bfbfef6a14dde and fixed in 5.19 with commit 9f342904216f378e88008bb0ce1ae200a4b99fe8

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-2022-49515
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:
	include/sound/cs35l41.h
	sound/soc/codecs/cs35l41-lib.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/dbc35268e14d5d89c7a9db72009ad4dcd9ede646
	https://git.kernel.org/stable/c/a59b9958416096dd21dc4f62b0c5be525d459ca8
	https://git.kernel.org/stable/c/9f342904216f378e88008bb0ce1ae200a4b99fe8