Red Hat: CVE-2024-42090: kernel: pinctrl: fix deadlock in create_pinctrl() when handling -EPROBE_DEFER (Multiple Advisories)

Red Hat: CVE-2024-42090: kernel: pinctrl: fix deadlock in create_pinctrl() when handling -EPROBE_DEFER (Multiple Advisories)

Severity

4

CVSS

(AV:L/AC:H/Au:S/C:N/I:N/A:C)

Published

07/29/2024

Created

09/26/2024

Added

09/25/2024

Modified

12/05/2024

Description

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.

Solution(s)

• redhat-upgrade-kernel
• redhat-upgrade-kernel-rt

References

• CVE-2024-42090
• RHSA-2024:7000
• RHSA-2024:7001
• RHSA-2024:8157
• RHSA-2024:8158
• RHSA-2024:9315