CVE-2026-72245: gpu: host1x: Fix device reference leak in host1x_device_parse_dt() error path

CVE-2026-72245: gpu: host1x: Fix device reference leak in host1x_device_parse_dt() error path

[Greg Kroah-Hartman]

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

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

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

gpu: host1x: Fix device reference leak in host1x_device_parse_dt() error path

After device_initialize(), the embedded struct device in struct
host1x_device should be released through the device core with
put_device().

In host1x_device_add(), if host1x_device_parse_dt() fails, the current
error path frees the object directly with kfree(device). That bypasses
the normal device lifetime handling and leaks the reference held on the
embedded struct device.

The issue was identified by a static analysis tool I developed and
confirmed by manual review.

Fix this by using put_device() in the host1x_device_parse_dt() failure
path.

The Linux kernel CVE team has assigned CVE-2026-72245 to this issue.


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

	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 5.10.261 with commit a408d89e20d38d78f540e1951dc4c6056ad662e1
	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 5.15.212 with commit 4ee41361c637eafa80f5d88b46d0016e6cdb24db
	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 6.1.178 with commit 3642d0a45214e3b4cf61bf5e75b04b490d0b3519
	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 6.6.145 with commit edc7267b59a465c6ae7c5ffac2171c30962bd325
	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 6.12.97 with commit 4454caa204a2edb19c62754ddb96e5dbca0d2f49
	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 6.18.40 with commit c4d6442ac3ed00041fe4e1df715717ed78a7d37f
	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 7.1.5 with commit 8559b1501f77a5b5d003790bec170ca449e0c674
	Issue introduced in 4.0 with commit f4c5cf88fbd50e4779042268947b2e2f90c20484 and fixed in 7.2-rc1 with commit e75717f9aec04355777be41070890c6a815c76df

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-2026-72245
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/host1x/bus.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/a408d89e20d38d78f540e1951dc4c6056ad662e1
	https://git.kernel.org/stable/c/4ee41361c637eafa80f5d88b46d0016e6cdb24db
	https://git.kernel.org/stable/c/3642d0a45214e3b4cf61bf5e75b04b490d0b3519
	https://git.kernel.org/stable/c/edc7267b59a465c6ae7c5ffac2171c30962bd325
	https://git.kernel.org/stable/c/4454caa204a2edb19c62754ddb96e5dbca0d2f49
	https://git.kernel.org/stable/c/c4d6442ac3ed00041fe4e1df715717ed78a7d37f
	https://git.kernel.org/stable/c/8559b1501f77a5b5d003790bec170ca449e0c674
	https://git.kernel.org/stable/c/e75717f9aec04355777be41070890c6a815c76df