CVE-2022-49102: habanalabs: fix possible memory leak in MMU DR fini

CVE-2022-49102: habanalabs: fix possible memory leak in MMU DR fini

[Greg Kroah-Hartman]

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

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

habanalabs: fix possible memory leak in MMU DR fini

This patch fixes what seems to be copy paste error.

We will have a memory leak if the host-resident shadow is NULL (which
will likely happen as the DR and HR are not dependent).

The Linux kernel CVE team has assigned CVE-2022-49102 to this issue.


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

	Fixed in 5.15.34 with commit 12e49aefda2e04b07604f13e03f40027cbeb0dc6
	Fixed in 5.16.20 with commit 6d421fb7a9eddd8ce0a05641a3db97283fe20699
	Fixed in 5.17.3 with commit 30058d3a83cfe8c6aacbfe5ab13c01dd0c1799e3
	Fixed in 5.18 with commit eb85eec858c1a5c11d3a0bff403f6440b05b40dc

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-2022-49102
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/misc/habanalabs/common/mmu/mmu_v1.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/12e49aefda2e04b07604f13e03f40027cbeb0dc6
	https://git.kernel.org/stable/c/6d421fb7a9eddd8ce0a05641a3db97283fe20699
	https://git.kernel.org/stable/c/30058d3a83cfe8c6aacbfe5ab13c01dd0c1799e3
	https://git.kernel.org/stable/c/eb85eec858c1a5c11d3a0bff403f6440b05b40dc