ghsa-crf3-x3fx-qg24
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-11-14 18:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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.]

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2022-50012"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:29Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/64: Init jump labels before parse_early_param()\n\nOn 64-bit, calling jump_label_init() in setup_feature_keys() is too\nlate because static keys may be used in subroutines of\nparse_early_param() which is again subroutine of early_init_devtree().\n\nFor example booting with \"threadirqs\":\n\n  static_key_enable_cpuslocked(): static key \u00270xc000000002953260\u0027 used before call to jump_label_init()\n  WARNING: CPU: 0 PID: 0 at kernel/jump_label.c:166 static_key_enable_cpuslocked+0xfc/0x120\n  ...\n  NIP static_key_enable_cpuslocked+0xfc/0x120\n  LR  static_key_enable_cpuslocked+0xf8/0x120\n  Call Trace:\n    static_key_enable_cpuslocked+0xf8/0x120 (unreliable)\n    static_key_enable+0x30/0x50\n    setup_forced_irqthreads+0x28/0x40\n    do_early_param+0xa0/0x108\n    parse_args+0x290/0x4e0\n    parse_early_options+0x48/0x5c\n    parse_early_param+0x58/0x84\n    early_init_devtree+0xd4/0x518\n    early_setup+0xb4/0x214\n\nSo call jump_label_init() just before parse_early_param() in\nearly_init_devtree().\n\n[mpe: Add call trace to change log and minor wording edits.]",
  "id": "GHSA-crf3-x3fx-qg24",
  "modified": "2025-11-14T18:31:25Z",
  "published": "2025-06-18T12:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50012"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4bb1188e2b1ed98fa2b618cc0628ccba63c6c80f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e14b04c8459afbeea1eeb74e81af86d7b196a4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8992141cb88f1d99fd11580f4423634700a99240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f9357313cdcadb0a311b44c29d4eaccc7fa632f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4ced9fd10073adc854919976b88ad6004271119"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca829e05d3d4f728810cc5e4b468d9ebc7745eb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dac28dff90849af4200b8269fcdc84cdc12fa46c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3c9e9452a8ea12d335b1e59b2c72e1b99c699b8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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