CVE-2022-49421: video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup

CVE-2022-49421: video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup

[Greg Kroah-Hartman]

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

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

video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup

of_parse_phandle() returns a node pointer with refcount incremented, we should
use of_node_put() on it when not need anymore.  Add missing of_node_put() to
avoid refcount leak.

The Linux kernel CVE team has assigned CVE-2022-49421 to this issue.


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

	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 4.9.318 with commit 6c92711db7c90f78e0b67ac2a8944d0fe7e12d83
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 4.14.283 with commit 2e2e2c71b2642289438392edbf5d08cdbc0b138b
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 4.19.247 with commit 51eb1bb6baeb478538dd4ec6459fd68c44a855b1
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 5.4.198 with commit 8db59df7f5826e104db82cfddbf22a33a151193e
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 5.10.121 with commit c1c4405222b6fc98c16e8c2aa679c14e41d81465
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 5.15.46 with commit f2dfb4ab887d67be7d0892ba041d3c8d738d3356
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 5.17.14 with commit bbb2a24e863b6a10129546a0a4ceea2f07deec39
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 5.18.3 with commit 38d245cebf545338a6bc1c7762023de3fbecd7b7
	Issue introduced in 3.17 with commit d10715be03bd8bad59ddc50236cb140c3bd73c7b and fixed in 5.19 with commit b23789a59fa6f00e98a319291819f91fbba0deb8

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-2022-49421
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/video/fbdev/amba-clcd.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/6c92711db7c90f78e0b67ac2a8944d0fe7e12d83
	https://git.kernel.org/stable/c/2e2e2c71b2642289438392edbf5d08cdbc0b138b
	https://git.kernel.org/stable/c/51eb1bb6baeb478538dd4ec6459fd68c44a855b1
	https://git.kernel.org/stable/c/8db59df7f5826e104db82cfddbf22a33a151193e
	https://git.kernel.org/stable/c/c1c4405222b6fc98c16e8c2aa679c14e41d81465
	https://git.kernel.org/stable/c/f2dfb4ab887d67be7d0892ba041d3c8d738d3356
	https://git.kernel.org/stable/c/bbb2a24e863b6a10129546a0a4ceea2f07deec39
	https://git.kernel.org/stable/c/38d245cebf545338a6bc1c7762023de3fbecd7b7
	https://git.kernel.org/stable/c/b23789a59fa6f00e98a319291819f91fbba0deb8