CVE-2021-47532: drm/msm/devfreq: Fix OPP refcnt leak

CVE-2021-47532: drm/msm/devfreq: Fix OPP refcnt leak

[Greg Kroah-Hartman]

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

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

drm/msm/devfreq: Fix OPP refcnt leak

The Linux kernel CVE team has assigned CVE-2021-47532 to this issue.


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

	Issue introduced in 5.15 with commit 9bc95570175a and fixed in 5.15.7 with commit a4eb55901df1
	Issue introduced in 5.15 with commit 9bc95570175a and fixed in 5.16 with commit 59ba1b2b4825

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-2021-47532
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/gpu/drm/msm/msm_gpu_devfreq.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/a4eb55901df1dce8c6944438bbdf57caf08911e2
	https://git.kernel.org/stable/c/59ba1b2b4825342676300f66d785764be3fcb093