CVE-2026-64154: drm/msm/adreno: Fix a reference leak in a6xx_gpu_init()

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

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

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

drm/msm/adreno: Fix a reference leak in a6xx_gpu_init()

In a6xx_gpu_init(), node is obtained via of_parse_phandle().
While there was a manual of_node_put() at the end of the
common path, several early error returns would bypass this call,
resulting in a reference leak.
Fix this by using the __free(device_node) cleanup handler to
release the reference when the variable goes out of scope.

Patchwork: https://patchwork.freedesktop.org/patch/700661/

The Linux kernel CVE team has assigned CVE-2026-64154 to this issue.


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

	Issue introduced in 6.5 with commit 5a903a44a98471cedf0021fac0a6a64bbe86943f and fixed in 7.0.11 with commit 2be24c945e76cd538ce5dd2e50f5d3e7d848c175
	Issue introduced in 6.5 with commit 5a903a44a98471cedf0021fac0a6a64bbe86943f and fixed in 7.1 with commit e64bca63647db1d5518198d6c5ca2dbcc66b182b

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-2026-64154
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/gpu/drm/msm/adreno/a6xx_gpu.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/2be24c945e76cd538ce5dd2e50f5d3e7d848c175
	https://git.kernel.org/stable/c/e64bca63647db1d5518198d6c5ca2dbcc66b182b