CVE-2026-89504: regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer

CVE-2026-89504: regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer

[Greg Kroah-Hartman]

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

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

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

regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer

In as3722_get_regulator_dt_data(), of_get_child_by_name() acquires a
reference on np, which is then assigned to pdev->dev.of_node. The
function immediately calls of_node_put(np), releasing the reference and
leaving pdev->dev.of_node as a dangling pointer.

Remove the of_node_put(np) call to let the device hold the reference.

The Linux kernel CVE team has assigned CVE-2026-89504 to this issue.


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

	Issue introduced in 3.13 with commit bc407334e9a6a745de5360395282beb2690adf48 and fixed in 6.12.109 with commit d3c1316d84e0a036890b00ae6e4c0b0b80f70c25
	Issue introduced in 3.13 with commit bc407334e9a6a745de5360395282beb2690adf48 and fixed in 6.18.50 with commit 95342d26f9c6b68a46ab57fa48428a3c4a423dd7
	Issue introduced in 3.13 with commit bc407334e9a6a745de5360395282beb2690adf48 and fixed in 7.2.4 with commit 8648e29e5c01b6b677c704049189287e27255ccb
	Issue introduced in 3.13 with commit bc407334e9a6a745de5360395282beb2690adf48 and fixed in 7.3-rc1 with commit f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c

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-2026-89504
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/regulator/as3722-regulator.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/d3c1316d84e0a036890b00ae6e4c0b0b80f70c25
	https://git.kernel.org/stable/c/95342d26f9c6b68a46ab57fa48428a3c4a423dd7
	https://git.kernel.org/stable/c/8648e29e5c01b6b677c704049189287e27255ccb
	https://git.kernel.org/stable/c/f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c