Linux Kernel Sleep-in-Atomic Vulnerability in Power Management Domains

A sleep-in-atomic vulnerability has been identified in the Linux kernel's power management domain handling. When a domain with the GENPD_FLAG_IRQ_SAFE flag is removed, the genpd_debug_remove() function is called while holding a spinlock, leading to a context error. This issue was observed in the 5.17.0-rc4+ version of the kernel, specifically on the Thundercomm TurboX CM2290 hardware.

Impact

The vulnerability can cause a sleep-in-atomic bug, where a sleeping function is called from an invalid context, potentially leading to deadlocks or other synchronization issues.