rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()

{
  "id": "158f00e1c4362b30858300a1b82ac72a656890d14a069e8867003898251f50a8",
  "url": "https://osv.dev/vulnerability/CVE-2022-50771",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state() Running rcutorture with non-zero fqs_duration module parameter in a kernel built with CONFIG_PREEMPTION=y results in the following splat: BUG: using __this_cpu_read() in preemptible [00000000] code: rcu_torture_fqs/398 caller is __this_cpu_preempt_check+0x13/0x20 CPU: 3 PID: 398 Comm: rcu_torture_fqs Not tainted 6.0.0-rc1-yoctodev-standard+ Call Trace: dump_stack_lvl+0x5b/0x86 dump_stack+0x10/0x16 check_preemption_disabled+0xe5/0xf0 __this_cpu_preempt_check+0x13/0x20 rcu_force_quiescent_state.part.0+0x1c/0x170 rcu_force_quiescent_state+0x1e/0x30 rcu_torture_fqs+0xca/0x160 ? rcu_torture_boost+0x430/0x430 kthread+0x192/0x1d0 ? kthread_complete_and_exit+0x30/0x30 ret_from_fork+0x22/0x30 The problem is that rcu_force_quiescent_state() uses __this_cpu_read() in preemptible code instead of the proper raw_cpu_read(). This commit therefore changes __this_cpu_read() to raw_cpu_read().",
    "evidence": "osv:CVE-2022-50771",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.229",
            "evidence": "/affected/1/ranges"
          },
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            "value": "5.10.163",
            "evidence": "/affected/1/ranges"
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            "value": "5.15.86",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.0.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50771",
      "aliases": [
        "CVE-2022-50771"
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                  "fixed": "80a3e7ab477b3655615fc1627c88c248d4ad28d9"
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:45.469909525Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3d92527a919edd1aa381bdd6c299dd75a8167396",
        "https://git.kernel.org/stable/c/5a52380b8193cf8be6c4a6b94b86ef64ed80c0dc",
        "https://git.kernel.org/stable/c/80a3e7ab477b3655615fc1627c88c248d4ad28d9",
        "https://git.kernel.org/stable/c/98a5b1265a36e9d843a51ddd6c9fa02da50d2c57",
        "https://git.kernel.org/stable/c/a74af9b937707b42c3fd041aae1ed4ce2f337307",
        "https://git.kernel.org/stable/c/ceb1c8c9b8aa9199da46a0f29d2d5f08d9b44c15",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50771.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50771",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
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    "related_cves": [
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        "value": "CVE-2022-50771",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 513492,
  "published_at": "2025-12-24T13:06:00.412+00:00"
}