linux-cve-announce - CVE-2022-49268: ASoC: SOF: Intel: Fix NULL ptr dereference when ENOMEM

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Message-ID: <2025022629-CVE-2022-49268-4842@gregkh>
Date: Wed, 26 Feb 2025 02:57:53 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49268: ASoC: SOF: Intel: Fix NULL ptr dereference when ENOMEM

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

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

ASoC: SOF: Intel: Fix NULL ptr dereference when ENOMEM

Do not call snd_dma_free_pages() when snd_dma_alloc_pages() returns
-ENOMEM because it leads to a NULL pointer dereference bug.

The dmesg says:

  [ T1387] sof-audio-pci-intel-tgl 0000:00:1f.3: error: memory alloc failed: -12
  [ T1387] BUG: kernel NULL pointer dereference, address: 0000000000000000
  [ T1387] #PF: supervisor read access in kernel mode
  [ T1387] #PF: error_code(0x0000) - not-present page
  [ T1387] PGD 0 P4D 0
  [ T1387] Oops: 0000 [#1] PREEMPT SMP NOPTI
  [ T1387] CPU: 6 PID: 1387 Comm: alsa-sink-HDA A Tainted: G        W         5.17.0-rc4-superb-owl-00055-g80d47f5de5e3
  [ T1387] Hardware name: HP HP Laptop 14s-dq2xxx/87FD, BIOS F.15 09/15/2021
  [ T1387] RIP: 0010:dma_free_noncontiguous+0x37/0x80
  [ T1387] Code: [... snip ...]
  [ T1387] RSP: 0000:ffffc90002b87770 EFLAGS: 00010246
  [ T1387] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
  [ T1387] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888101db30d0
  [ T1387] RBP: 00000000fffffff4 R08: 0000000000000000 R09: 0000000000000000
  [ T1387] R10: 0000000000000000 R11: ffffc90002b874d0 R12: 0000000000000001
  [ T1387] R13: 0000000000058000 R14: ffff888105260c68 R15: ffff888105260828
  [ T1387] FS:  00007f42e2ffd640(0000) GS:ffff888466b80000(0000) knlGS:0000000000000000
  [ T1387] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [ T1387] CR2: 0000000000000000 CR3: 000000014acf0003 CR4: 0000000000770ee0
  [ T1387] PKRU: 55555554
  [ T1387] Call Trace:
  [ T1387]  <TASK>
  [ T1387]  cl_stream_prepare+0x10a/0x120 [snd_sof_intel_hda_common 146addf995b9279ae7f509621078cccbe4f875e1]
  [... snip ...]
  [ T1387]  </TASK>

The Linux kernel CVE team has assigned CVE-2022-49268 to this issue.


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

	Issue introduced in 5.2 with commit d16046ffa6de040bf580a64d5f4d0aa18258a854 and fixed in 5.4.189 with commit 01df5f7627f1624d6bb0b8c0870a569b32adfbf8
	Issue introduced in 5.2 with commit d16046ffa6de040bf580a64d5f4d0aa18258a854 and fixed in 5.10.110 with commit 0c307349fe060971625b856c92f0361b8ea9a120
	Issue introduced in 5.2 with commit d16046ffa6de040bf580a64d5f4d0aa18258a854 and fixed in 5.15.33 with commit b6094744e261083d3790c3def770ebf5060d383b
	Issue introduced in 5.2 with commit d16046ffa6de040bf580a64d5f4d0aa18258a854 and fixed in 5.16.19 with commit 09eca322d4118dc26570ca6100fa34e59e5a5143
	Issue introduced in 5.2 with commit d16046ffa6de040bf580a64d5f4d0aa18258a854 and fixed in 5.17.2 with commit 67f7bd9ff9079c1ee2de58e024fb582905c74c16
	Issue introduced in 5.2 with commit d16046ffa6de040bf580a64d5f4d0aa18258a854 and fixed in 5.18 with commit b7fb0ae09009d076964afe4c1a2bde1ee2bd88a9

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-2022-49268
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:
	sound/soc/sof/intel/hda-loader.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/01df5f7627f1624d6bb0b8c0870a569b32adfbf8
	https://git.kernel.org/stable/c/0c307349fe060971625b856c92f0361b8ea9a120
	https://git.kernel.org/stable/c/b6094744e261083d3790c3def770ebf5060d383b
	https://git.kernel.org/stable/c/09eca322d4118dc26570ca6100fa34e59e5a5143
	https://git.kernel.org/stable/c/67f7bd9ff9079c1ee2de58e024fb582905c74c16
	https://git.kernel.org/stable/c/b7fb0ae09009d076964afe4c1a2bde1ee2bd88a9