leds: an30259a: Use devm_mutex_init() for mutex initialization

Overview

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

leds: an30259a: Use devm_mutex_init() for mutex initialization

In this driver LEDs are registered using devm_led_classdev_register() so they are automatically unregistered after module's remove() is done. led_classdev_unregister() calls module's led_set_brightness() to turn off the LEDs and that callback uses mutex which was destroyed already in module's remove() so use devm API instead.

Affected

• Linux >= 2d00f35c55e74fcb5626c9aa336c1ed697cd2ae9 < 56c05de9749534436f1a3c7859a8167f34dd5010
• Linux >= 2d00f35c55e74fcb5626c9aa336c1ed697cd2ae9 < 3ead19aa341de89a8c3d88a091d8093ebea622e8
• Linux >= 2d00f35c55e74fcb5626c9aa336c1ed697cd2ae9 < 9dba44460bfca657ca43f03ea9bafa4f9f7dd077
• Linux >= 2d00f35c55e74fcb5626c9aa336c1ed697cd2ae9 < c382e2e3eccb6b7ca8c7aff5092c1668428e7de6
• Linux 4.20

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.