CVE-2022-50573: wifi: mt76: mt7915: fix mt7915_rate_txpower_get() resource leaks

CVE-2022-50573: wifi: mt76: mt7915: fix mt7915_rate_txpower_get() resource leaks

[Greg Kroah-Hartman]

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

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

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

wifi: mt76: mt7915: fix mt7915_rate_txpower_get() resource leaks

Coverity message: variable "buf" going out of scope leaks the storage.

Addresses-Coverity-ID: 1527799 ("Resource leaks")

The Linux kernel CVE team has assigned CVE-2022-50573 to this issue.


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

	Issue introduced in 6.2 with commit e3296759f34752ea2562678706dbb5bf607af530 and fixed in 6.2.3 with commit ecff00802f60fa5d08c133d209ed984a455a41f8
	Issue introduced in 6.2 with commit e3296759f34752ea2562678706dbb5bf607af530 and fixed in 6.3 with commit 8b25301af01566f4b5a301fc1ad7c5d2b1788d7f

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-2022-50573
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/mediatek/mt76/mt7915/debugfs.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/ecff00802f60fa5d08c133d209ed984a455a41f8
	https://git.kernel.org/stable/c/8b25301af01566f4b5a301fc1ad7c5d2b1788d7f