CVE-2026-80911: ASoC: SOF: sof-audio: Fix error path in sof_widget_setup_unlocked()

CVE-2026-80911: ASoC: SOF: sof-audio: Fix error path in sof_widget_setup_unlocked()

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@kernel.org>

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

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

ASoC: SOF: sof-audio: Fix error path in sof_widget_setup_unlocked()

If either tplg_ops->dai_config or widget_kcontrol_setup fail during widget
setup we would double decrement the use_count of the widget because the
sof_widget_free_unlocked() would be called twice, similarly the core_put
would be invoked twice as well.

Since the use_count and core_put() is handled within the widget_free
function we need to return without falling through the pipe_widget_free
label.

The fixes tag is picked to the last change around this part of the code
which is adequately old enough for backporting purposes.

The Linux kernel CVE team has assigned CVE-2026-80911 to this issue.


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

	Issue introduced in 6.6.13 with commit 3c124f09b7ff0434b076a8dec1ed446a6170b549 and fixed in 6.6.153 with commit b270ed327380428581bbcbd85707f62e942428d7
	Issue introduced in 6.7 with commit 31ed8da1c8e5e504710bb36863700e3389f8fc81 and fixed in 6.12.105 with commit c06995637f6a4667f2b540ac65315bfc8196a099
	Issue introduced in 6.7 with commit 31ed8da1c8e5e504710bb36863700e3389f8fc81 and fixed in 6.18.46 with commit 8cba53b862e1437257ec206d303ff942684284f1
	Issue introduced in 6.7 with commit 31ed8da1c8e5e504710bb36863700e3389f8fc81 and fixed in 7.1.10 with commit d48691e70d4a9434b71039d4ed12bb0df4601acf
	Issue introduced in 6.7 with commit 31ed8da1c8e5e504710bb36863700e3389f8fc81 and fixed in 7.2 with commit e780e4917d43683224812400fe3dc4816fceba75

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-2026-80911
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/sof-audio.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/b270ed327380428581bbcbd85707f62e942428d7
	https://git.kernel.org/stable/c/c06995637f6a4667f2b540ac65315bfc8196a099
	https://git.kernel.org/stable/c/8cba53b862e1437257ec206d303ff942684284f1
	https://git.kernel.org/stable/c/d48691e70d4a9434b71039d4ed12bb0df4601acf
	https://git.kernel.org/stable/c/e780e4917d43683224812400fe3dc4816fceba75