CVE-2024-42090 Information

Jul 31, 2024 cve

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.

Reference

https://git.kernel.org/stable/c/e65a0dc2e85efb28e182aca50218e8a056d0ce04 https://git.kernel.org/stable/c/420ce1261907e5dbeda1e4daffd5b6c76f8188c0 https://git.kernel.org/stable/c/b813e3fd102a959c5b208ed68afe27e0137a561b https://git.kernel.org/stable/c/01fe2f885f7813f8aed5d3704b384a97b1116a9e https://git.kernel.org/stable/c/b36efd2e3e22a329444b6b24fa48df6d20ae66e6 https://git.kernel.org/stable/c/4038c57bf61631219b31f1bd6e92106ec7f084dc https://git.kernel.org/stable/c/48a7a7c9571c3e62f17012dd7f2063e926179ddd https://git.kernel.org/stable/c/adec57ff8e66aee632f3dd1f93787c13d112b7a1

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