CVE-2023-53745: um: vector: Fix memory leak in vector_config

CVE-2023-53745: um: vector: Fix memory leak in vector_config

[Greg Kroah-Hartman]

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

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

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

um: vector: Fix memory leak in vector_config

If the return value of the uml_parse_vector_ifspec function is NULL,
we should call kfree(params) to prevent memory leak.

The Linux kernel CVE team has assigned CVE-2023-53745 to this issue.


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

	Issue introduced in 4.17 with commit 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb and fixed in 4.19.276 with commit 5c49fb5ad01104acc584405572abf6616d45148e
	Issue introduced in 4.17 with commit 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb and fixed in 5.4.235 with commit 6480c3a12755bf85d6738ab60967e89b809c701a
	Issue introduced in 4.17 with commit 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb and fixed in 5.10.173 with commit f2b9c4544e3bd60f353732291300097b0e8d8454
	Issue introduced in 4.17 with commit 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb and fixed in 5.15.100 with commit 276a7298af6a801e9a865282605a79303365ec66
	Issue introduced in 4.17 with commit 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb and fixed in 6.1.18 with commit c8583b4655aab44a9796b5c4a681ddcc6fe2f0d0
	Issue introduced in 4.17 with commit 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb and fixed in 6.2.5 with commit 634a9c139cc1362f6a9cc6cbfe442dbb60ff9f3f
	Issue introduced in 4.17 with commit 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb and fixed in 6.3 with commit 8f88c73afe481f93d40801596927e8c0047b6d96

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-2023-53745
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:
	arch/um/drivers/vector_kern.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/5c49fb5ad01104acc584405572abf6616d45148e
	https://git.kernel.org/stable/c/6480c3a12755bf85d6738ab60967e89b809c701a
	https://git.kernel.org/stable/c/f2b9c4544e3bd60f353732291300097b0e8d8454
	https://git.kernel.org/stable/c/276a7298af6a801e9a865282605a79303365ec66
	https://git.kernel.org/stable/c/c8583b4655aab44a9796b5c4a681ddcc6fe2f0d0
	https://git.kernel.org/stable/c/634a9c139cc1362f6a9cc6cbfe442dbb60ff9f3f
	https://git.kernel.org/stable/c/8f88c73afe481f93d40801596927e8c0047b6d96