CVE-2026-80883: drm/tegra: gr2d/gr3d: Initialize address register map before HOST1X client is registered

CVE-2026-80883: drm/tegra: gr2d/gr3d: Initialize address register map before HOST1X client is registered

[Greg Kroah-Hartman]

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

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

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

drm/tegra: gr2d/gr3d: Initialize address register map before HOST1X client is registered

The host1x_client_register() function is called just prior to register map
initialization loop, making the device available to userspace. This may
result in userspace attempting to submits a job before the register map is
initialized. Address this by moving register initialization before host1x
client registration.

The Linux kernel CVE team has assigned CVE-2026-80883 to this issue.


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

	Fixed in 6.6.145 with commit 6e22d5ad61cfa38aa53fab86a530113aff6a3619
	Fixed in 6.12.97 with commit 5db37fd7710e74bc4df48bddab8f571d0bfc6769
	Fixed in 6.18.40 with commit 40a2a91da02c434938f0ba53877984820800b5f0
	Fixed in 7.1.5 with commit 3055292b8eed69553b389a609197a241df47e68e
	Fixed in 7.2 with commit c4ef5ba1131346159e31f4ef858525cf377380a6

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-2026-80883
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/tegra/gr2d.c
	drivers/gpu/drm/tegra/gr3d.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/6e22d5ad61cfa38aa53fab86a530113aff6a3619
	https://git.kernel.org/stable/c/5db37fd7710e74bc4df48bddab8f571d0bfc6769
	https://git.kernel.org/stable/c/40a2a91da02c434938f0ba53877984820800b5f0
	https://git.kernel.org/stable/c/3055292b8eed69553b389a609197a241df47e68e
	https://git.kernel.org/stable/c/c4ef5ba1131346159e31f4ef858525cf377380a6