linux-cve-announce - CVE-2025-68222: pinctrl: s32cc: fix uninitialized memory in s32_pinctrl

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Message-ID: <2025121633-CVE-2025-68222-1d22@gregkh>
Date: Tue, 16 Dec 2025 14:57:41 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-68222: pinctrl: s32cc: fix uninitialized memory in s32_pinctrl_desc

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

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

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

pinctrl: s32cc: fix uninitialized memory in s32_pinctrl_desc

s32_pinctrl_desc is allocated with devm_kmalloc(), but not all of its
fields are initialized. Notably, num_custom_params is used in
pinconf_generic_parse_dt_config(), resulting in intermittent allocation
errors, such as the following splat when probing i2c-imx:

        WARNING: CPU: 0 PID: 176 at mm/page_alloc.c:4795 __alloc_pages_noprof+0x290/0x300
        [...]
        Hardware name: NXP S32G3 Reference Design Board 3 (S32G-VNP-RDB3) (DT)
        [...]
        Call trace:
         __alloc_pages_noprof+0x290/0x300 (P)
         ___kmalloc_large_node+0x84/0x168
         __kmalloc_large_node_noprof+0x34/0x120
         __kmalloc_noprof+0x2ac/0x378
         pinconf_generic_parse_dt_config+0x68/0x1a0
         s32_dt_node_to_map+0x104/0x248
         dt_to_map_one_config+0x154/0x1d8
         pinctrl_dt_to_map+0x12c/0x280
         create_pinctrl+0x6c/0x270
         pinctrl_get+0xc0/0x170
         devm_pinctrl_get+0x50/0xa0
         pinctrl_bind_pins+0x60/0x2a0
         really_probe+0x60/0x3a0
        [...]
         __platform_driver_register+0x2c/0x40
         i2c_adap_imx_init+0x28/0xff8 [i2c_imx]
        [...]

This results in later parse failures that can cause issues in dependent
drivers:

        s32g-siul2-pinctrl 4009c240.pinctrl: /soc@...inctrl@...9c240/i2c0-pins/i2c0-grp0: could not parse node property
        s32g-siul2-pinctrl 4009c240.pinctrl: /soc@...inctrl@...9c240/i2c0-pins/i2c0-grp0: could not parse node property
        [...]
        pca953x 0-0022: failed writing register: -6
        i2c i2c-0: IMX I2C adapter registered
        s32g-siul2-pinctrl 4009c240.pinctrl: /soc@...inctrl@...9c240/i2c2-pins/i2c2-grp0: could not parse node property
        s32g-siul2-pinctrl 4009c240.pinctrl: /soc@...inctrl@...9c240/i2c2-pins/i2c2-grp0: could not parse node property
        i2c i2c-1: IMX I2C adapter registered
        s32g-siul2-pinctrl 4009c240.pinctrl: /soc@...inctrl@...9c240/i2c4-pins/i2c4-grp0: could not parse node property
        s32g-siul2-pinctrl 4009c240.pinctrl: /soc@...inctrl@...9c240/i2c4-pins/i2c4-grp0: could not parse node property
        i2c i2c-2: IMX I2C adapter registered

Fix this by initializing s32_pinctrl_desc with devm_kzalloc() instead of
devm_kmalloc() in s32_pinctrl_probe(), which sets the previously
uninitialized fields to zero.

The Linux kernel CVE team has assigned CVE-2025-68222 to this issue.


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

	Issue introduced in 6.4 with commit fd84aaa8173d3ff86f8df2009921336a1ea53a8a and fixed in 6.6.118 with commit 3b90bd8aaeb21b513ecc4ed03299e80ece44a333
	Issue introduced in 6.4 with commit fd84aaa8173d3ff86f8df2009921336a1ea53a8a and fixed in 6.12.60 with commit 583ac7f65791ceda38ea1a493a4859f7161dcb03
	Issue introduced in 6.4 with commit fd84aaa8173d3ff86f8df2009921336a1ea53a8a and fixed in 6.17.10 with commit 7bbdd6c30e8fd92f7165b7730b038cfe42102004
	Issue introduced in 6.4 with commit fd84aaa8173d3ff86f8df2009921336a1ea53a8a and fixed in 6.18 with commit 97ea34defbb57bfaf71ce487b1b0865ffd186e81

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-2025-68222
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/pinctrl/nxp/pinctrl-s32cc.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/3b90bd8aaeb21b513ecc4ed03299e80ece44a333
	https://git.kernel.org/stable/c/583ac7f65791ceda38ea1a493a4859f7161dcb03
	https://git.kernel.org/stable/c/7bbdd6c30e8fd92f7165b7730b038cfe42102004
	https://git.kernel.org/stable/c/97ea34defbb57bfaf71ce487b1b0865ffd186e81