CVE-2024-56671

/// Technical description

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

gpio: graniterapids: Fix vGPIO driver crash

Move setting irq_chip.name from probe() function to the initialization

of "irq_chip" struct in order to fix vGPIO driver crash during bootup.

Crash was caused by unauthorized modification of irq_chip.name field

where irq_chip struct was initialized as const.

This behavior is a consequence of suboptimal implementation of

gpio_irq_chip_set_chip(), which should be changed to avoid

casting away const qualifier.

Crash log:

BUG: unable to handle page fault for address: ffffffffc0ba81c0

/#PF: supervisor write access in kernel mode

/#PF: error_code(0x0003) - permissions violation

CPU: 33 UID: 0 PID: 1075 Comm: systemd-udevd Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7 #1

Hardware name: Intel Corporation Kaseyville RP/Kaseyville RP, BIOS KVLDCRB1.PGS.0026.D73.2410081258 10/08/2024

RIP: 0010:gnr_gpio_probe+0x171/0x220 [gpio_graniterapids]

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References