Linux Kernel OcteonTX2-PF GFP_KERNEL Misuse in Atomic Context Vulnerability

A vulnerability in the Linux kernel's OcteonTX2-PF component has been addressed. The issue arose from using GFP_KERNEL in a context where preemption is disabled, leading to potential sleep operations that are not allowed. This problem triggered a warning when CONFIG_DEBUG_ATOMIC_SLEEP is enabled, indicating that a sleeping function was called from an invalid context. The vulnerability was present in Linux kernel version 6.2.0-rc2-00269-gae9dcb91c606 on Marvell CN106XX boards.

Impact

The vulnerability could lead to improper memory allocation, causing sleeping functions to be called in an atomic context, which can disrupt normal scheduling and preemption operations in the kernel.