---
id: CVE-2022-50012
title: 'powerpc/64: Init jump labels before parse_early_param()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  powerpc/64: Init jump labels before parse_early_param()

  On 64-bit, calling jump_label_init() in setup_feature_keys() is too
  late because static keys may be used in sub…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 91cc470e797828d779cd4c1efbe8519bcb358bae <
    e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8
  - >-
    Linux >= 91cc470e797828d779cd4c1efbe8519bcb358bae <
    8f9357313cdcadb0a311b44c29d4eaccc7fa632f
  - >-
    Linux >= 91cc470e797828d779cd4c1efbe8519bcb358bae <
    ca829e05d3d4f728810cc5e4b468d9ebc7745eb3
  - Linux 5.15
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T19:52:59.950888Z'
published: '2025-06-18'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:00:13.772Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-50012'
references:
  - url: 'https://git.kernel.org/stable/c/e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8'
  - url: 'https://git.kernel.org/stable/c/8f9357313cdcadb0a311b44c29d4eaccc7fa632f'
  - url: 'https://git.kernel.org/stable/c/ca829e05d3d4f728810cc5e4b468d9ebc7745eb3'
tags:
  - cve.org
epss: 0.00249
epssPercentile: 0.16368
ingestedAt: '2026-11-05T22:38:31.636Z'
---

## Overview

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

powerpc/64: Init jump labels before parse_early_param()

On 64-bit, calling jump_label_init() in setup_feature_keys() is too
late because static keys may be used in subroutines of
parse_early_param() which is again subroutine of early_init_devtree().

For example booting with "threadirqs":

  static_key_enable_cpuslocked(): static key '0xc000000002953260' used before call to jump_label_init()
  WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:166 static_key_enable_cpuslocked+0xfc/0x120
  ...
  NIP static_key_enable_cpuslocked+0xfc/0x120
  LR  static_key_enable_cpuslocked+0xf8/0x120
  Call Trace:
    static_key_enable_cpuslocked+0xf8/0x120 (unreliable)
    static_key_enable+0x30/0x50
    setup_forced_irqthreads+0x28/0x40
    do_early_param+0xa0/0x108
    parse_args+0x290/0x4e0
    parse_early_options+0x48/0x5c
    parse_early_param+0x58/0x84
    early_init_devtree+0xd4/0x518
    early_setup+0xb4/0x214

So call jump_label_init() just before parse_early_param() in
early_init_devtree().

[mpe: Add call trace to change log and minor wording edits.]

## Affected

- `Linux >= 91cc470e797828d779cd4c1efbe8519bcb358bae < e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8`
- `Linux >= 91cc470e797828d779cd4c1efbe8519bcb358bae < 8f9357313cdcadb0a311b44c29d4eaccc7fa632f`
- `Linux >= 91cc470e797828d779cd4c1efbe8519bcb358bae < ca829e05d3d4f728810cc5e4b468d9ebc7745eb3`
- `Linux 5.15`

## Remediation

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