CVE-2022-49265

/// Technical description

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

PM: domains: Fix sleep-in-atomic bug caused by genpd_debug_remove()

When a genpd with GENPD_FLAG_IRQ_SAFE gets removed, the following

sleep-in-atomic bug will be seen, as genpd_debug_remove() will be called

with a spinlock being held.

[ 0.029183] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1460

[ 0.029204] in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 1, name: swapper/0

[ 0.029219] preempt_count: 1, expected: 0

[ 0.029230] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.17.0-rc4+ #489

[ 0.029245] Hardware name: Thundercomm TurboX CM2290 (DT)

[ 0.029256] Call trace:

[ 0.029265] dump_backtrace.part.0+0xbc/0xd0

[ 0.029285] show_stack+0x3c/0xa0

[ 0.029298] dump_stack_lvl+0x7c/0xa0

[ 0.029311] dump_stack+0x18/0x34

[ 0.029323] __might_resched+0x10c/0x13c

[ 0.029338] __might_sleep+0x4c/0x80

[ 0.029351] down_read+0x24/0xd0

[ 0.029363]

/// 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