CVE-2023-53767: wifi: ath12k: fix memory leak in ath12k_qmi_driver_event_work()

CVE-2023-53767: wifi: ath12k: fix memory leak in ath12k_qmi_driver_event_work()

[Greg Kroah-Hartman]

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

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

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

wifi: ath12k: fix memory leak in ath12k_qmi_driver_event_work()

Currently the buffer pointed by event is not freed in case
ATH12K_FLAG_UNREGISTERING bit is set, this causes memory leak.

Add a goto skip instead of return, to ensure event and all the
list entries are freed properly.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1

The Linux kernel CVE team has assigned CVE-2023-53767 to this issue.


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

	Fixed in 6.3.4 with commit a87f59041a7f77b4bdab05cea60ac6adc69dc5d2
	Fixed in 6.4 with commit 960412bee0ea75f6b3c2dca4a3535795ee84c47a

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-2023-53767
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/ath/ath12k/qmi.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/a87f59041a7f77b4bdab05cea60ac6adc69dc5d2
	https://git.kernel.org/stable/c/960412bee0ea75f6b3c2dca4a3535795ee84c47a