CVE-2026-90402: bus: mhi: host: Fix controller cleanup on EDL sysfs failure

CVE-2026-90402: bus: mhi: host: Fix controller cleanup on EDL sysfs failure

[Greg Kroah-Hartman]

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

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

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

bus: mhi: host: Fix controller cleanup on EDL sysfs failure

mhi_register_controller() adds the controller device before creating the
optional trigger_edl sysfs file. If sysfs_create_file() fails, the error
path only drops the device reference and leaves the device registered.

Hence, call device_del() in the error path before put_device().

The Linux kernel CVE team has assigned CVE-2026-90402 to this issue.


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

	Issue introduced in 6.10 with commit 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 and fixed in 6.12.110 with commit 7943dc67250fad6ceac0dd089c6ad5776e4be71d
	Issue introduced in 6.10 with commit 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 and fixed in 6.18.52 with commit 4fb17a7c437f145353e93e6a9791f6db70e1cc63
	Issue introduced in 6.10 with commit 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 and fixed in 7.2.6 with commit 4743959aa8d876b5b456a62e8a62eb770db7afe9
	Issue introduced in 6.10 with commit 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 and fixed in 7.3-rc1 with commit 0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee

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-2026-90402
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/bus/mhi/host/init.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/7943dc67250fad6ceac0dd089c6ad5776e4be71d
	https://git.kernel.org/stable/c/4fb17a7c437f145353e93e6a9791f6db70e1cc63
	https://git.kernel.org/stable/c/4743959aa8d876b5b456a62e8a62eb770db7afe9
	https://git.kernel.org/stable/c/0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee