Subject: CVE-2022-48896: ixgbe: fix pci device refcount leak

From: Greg Kroah-Hartman <[email-masked]>

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

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

ixgbe: fix pci device refcount leak

As the comment of pci_get_domain_bus_and_slot() says, it
returns a PCI device with refcount incremented, when finish
using it, the caller must decrement the reference count by
calling pci_dev_put().

In ixgbe_get_first_secondary_devfn() and ixgbe_x550em_a_has_mii(),
pci_dev_put() is called to avoid leak.

The Linux kernel CVE team has assigned CVE-2022-48896 to this issue.

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

	Issue introduced in 5.0 with commit 8fa10ef01260 and fixed in 5.4.229 with commit 53cefa802f07
	Issue introduced in 5.0 with commit 8fa10ef01260 and fixed in 5.10.164 with commit 112df4cd2b09
	Issue introduced in 5.0 with commit 8fa10ef01260 and fixed in 5.15.89 with commit 4c93422a54cd
	Issue introduced in 5.0 with commit 8fa10ef01260 and fixed in 6.1.7 with commit c49996c6aa03
	Issue introduced in 5.0 with commit 8fa10ef01260 and fixed in 6.2 with commit b93fb4405fcb

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-2022-48896
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/ethernet/intel/ixgbe/ixgbe_phy.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/53cefa802f070d46c0c518f4865be2c749818a18
	https://git.kernel.org/stable/c/112df4cd2b09acd64bcd18f5ef83ba5d07b34bf0
	https://git.kernel.org/stable/c/4c93422a54cd6a349988f42e1c6bf082cf4ea9d8
	https://git.kernel.org/stable/c/c49996c6aa03590e4ef5add8772cb6068d99fd59
	https://git.kernel.org/stable/c/b93fb4405fcb5112c5739c5349afb52ec7f15c07