Bug 2300552 (CVE-2024-42090)

Summary:	CVE-2024-42090 kernel: pinctrl: fix deadlock in create_pinctrl() when handling -EPROBE_DEFER
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.19.317, kernel 5.4.279, kernel 5.10.221, kernel 5.15.162, kernel 6.1.97, kernel 6.6.37, kernel 6.9.8, kernel 6.10	Doc Type:	If docs needed, set a value
Doc Text:	A deadlock flaw was found in the Linux kernel’s pinctrl subsystem. This flaw allows a local user to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2301742, 2307209
Bug Blocks:

Description OSIDB Bzimport 2024-07-29 17:30:28 UTC

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

pinctrl: fix deadlock in create_pinctrl() when handling -EPROBE_DEFER

In create_pinctrl(), pinctrl_maps_mutex is acquired before calling
add_setting(). If add_setting() returns -EPROBE_DEFER, create_pinctrl()
calls pinctrl_free(). However, pinctrl_free() attempts to acquire
pinctrl_maps_mutex, which is already held by create_pinctrl(), leading to
a potential deadlock.

This patch resolves the issue by releasing pinctrl_maps_mutex before
calling pinctrl_free(), preventing the deadlock.

This bug was discovered and resolved using Coverity Static Analysis
Security Testing (SAST) by Synopsys, Inc.

Comment 1 Mauro Matteo Cascella 2024-07-30 17:30:27 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024072946-CVE-2024-42090-5687@gregkh/T

Comment 2 Mauro Matteo Cascella 2024-07-30 17:30:47 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2301742]

Comment 132 errata-xmlrpc 2024-09-24 00:39:51 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:7001 https://access.redhat.com/errata/RHSA-2024:7001

Comment 133 errata-xmlrpc 2024-09-24 02:35:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:7000 https://access.redhat.com/errata/RHSA-2024:7000

Comment 134 errata-xmlrpc 2024-10-16 00:09:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:8158 https://access.redhat.com/errata/RHSA-2024:8158

Comment 135 errata-xmlrpc 2024-10-16 00:20:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:8157 https://access.redhat.com/errata/RHSA-2024:8157

Comment 136 errata-xmlrpc 2024-11-12 09:37:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:9315 https://access.redhat.com/errata/RHSA-2024:9315

Comment 137 errata-xmlrpc 2025-09-02 05:55:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2025:15016 https://access.redhat.com/errata/RHSA-2025:15016