linux-cve-announce - CVE-2025-37974: s390/pci: Fix missing check for zpci_create

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Message-ID: <2025052046-CVE-2025-37974-adfa@gregkh>
Date: Tue, 20 May 2025 18:45:53 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37974: s390/pci: Fix missing check for zpci_create_device() error return

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

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

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

s390/pci: Fix missing check for zpci_create_device() error return

The zpci_create_device() function returns an error pointer that needs to
be checked before dereferencing it as a struct zpci_dev pointer. Add the
missing check in __clp_add() where it was missed when adding the
scan_list in the fixed commit. Simply not adding the device to the scan
list results in the previous behavior.

The Linux kernel CVE team has assigned CVE-2025-37974 to this issue.


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

	Issue introduced in 6.12.5 with commit 1f3b309108fd0660ea8614a72328ba866ccd3378 and fixed in 6.12.29 with commit be54b750c333a9db7c3b3686846bb06b07b011fe
	Issue introduced in 6.13 with commit 0467cdde8c4320bbfdb31a8cff1277b202f677fc and fixed in 6.14.7 with commit 2769b718e164df983c20c314b263a71a699be6cd
	Issue introduced in 6.13 with commit 0467cdde8c4320bbfdb31a8cff1277b202f677fc and fixed in 6.15-rc6 with commit 42420c50c68f3e95e90de2479464f420602229fc

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-2025-37974
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:
	arch/s390/pci/pci_clp.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/be54b750c333a9db7c3b3686846bb06b07b011fe
	https://git.kernel.org/stable/c/2769b718e164df983c20c314b263a71a699be6cd
	https://git.kernel.org/stable/c/42420c50c68f3e95e90de2479464f420602229fc