CVE-2026-97473: powercap: intel_rapl: Fix memory leak in rapl_add_package_cpuslocked()

CVE-2026-97473: powercap: intel_rapl: Fix memory leak in rapl_add_package_cpuslocked()

[Greg Kroah-Hartman]

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

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

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

powercap: intel_rapl: Fix memory leak in rapl_add_package_cpuslocked()

When topology_physical_package_id()/topology_logical_die_id() returns
a negative value, rapl_add_package_cpuslocked() returns ERR_PTR(-EINVAL)
directly without freeing the rapl_package structure that was just
allocated by kzalloc_obj(), leaking memory on every failed package
addition.

Use the existing err_free_package label so that the allocation is
released on the error path.

The Linux kernel CVE team has assigned CVE-2026-97473 to this issue.


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

	Fixed in 6.12.111 with commit 3e9e9337e03be946ec93f2c9d28dab242482be1b
	Fixed in 6.18.53 with commit 992c60771749d8d8cbfbd06049785fff95c72df1
	Fixed in 7.2 with commit bfc7d93bc5e12288e5dc6bb54260f68cdf5a5c47

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-2026-97473
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/powercap/intel_rapl_common.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/3e9e9337e03be946ec93f2c9d28dab242482be1b
	https://git.kernel.org/stable/c/992c60771749d8d8cbfbd06049785fff95c72df1
	https://git.kernel.org/stable/c/bfc7d93bc5e12288e5dc6bb54260f68cdf5a5c47