CVE-2022-50771 (GCVE-0-2022-50771)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:06 – Updated: 2026-05-11 19:25
VLAI
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: <TASK> 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 </TASK> 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().
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d860d40327dde251d508a234fa00bd0d90fbb656 , < 3d92527a919edd1aa381bdd6c299dd75a8167396 (git)
Affected: d860d40327dde251d508a234fa00bd0d90fbb656 , < 5a52380b8193cf8be6c4a6b94b86ef64ed80c0dc (git)
Affected: d860d40327dde251d508a234fa00bd0d90fbb656 , < 98a5b1265a36e9d843a51ddd6c9fa02da50d2c57 (git)
Affected: d860d40327dde251d508a234fa00bd0d90fbb656 , < a74af9b937707b42c3fd041aae1ed4ce2f337307 (git)
Affected: d860d40327dde251d508a234fa00bd0d90fbb656 , < 80a3e7ab477b3655615fc1627c88c248d4ad28d9 (git)
Affected: d860d40327dde251d508a234fa00bd0d90fbb656 , < ceb1c8c9b8aa9199da46a0f29d2d5f08d9b44c15 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()\n\nRunning rcutorture with non-zero fqs_duration module parameter in a\nkernel built with CONFIG_PREEMPTION=y results in the following splat:\n\nBUG: using __this_cpu_read() in preemptible [00000000]\ncode: rcu_torture_fqs/398\ncaller is __this_cpu_preempt_check+0x13/0x20\nCPU: 3 PID: 398 Comm: rcu_torture_fqs Not tainted 6.0.0-rc1-yoctodev-standard+\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x5b/0x86\ndump_stack+0x10/0x16\ncheck_preemption_disabled+0xe5/0xf0\n__this_cpu_preempt_check+0x13/0x20\nrcu_force_quiescent_state.part.0+0x1c/0x170\nrcu_force_quiescent_state+0x1e/0x30\nrcu_torture_fqs+0xca/0x160\n? rcu_torture_boost+0x430/0x430\nkthread+0x192/0x1d0\n? kthread_complete_and_exit+0x30/0x30\nret_from_fork+0x22/0x30\n\u003c/TASK\u003e\n\nThe problem is that rcu_force_quiescent_state() uses __this_cpu_read()\nin preemptible code instead of the proper raw_cpu_read().  This commit\ntherefore changes __this_cpu_read() to raw_cpu_read()."
        }
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()\n\nRunning rcutorture with non-zero fqs_duration module parameter in a\nkernel built with CONFIG_PREEMPTION=y results in the following splat:\n\nBUG: using __this_cpu_read() in preemptible [00000000]\ncode: rcu_torture_fqs/398\ncaller is __this_cpu_preempt_check+0x13/0x20\nCPU: 3 PID: 398 Comm: rcu_torture_fqs Not tainted 6.0.0-rc1-yoctodev-standard+\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x5b/0x86\ndump_stack+0x10/0x16\ncheck_preemption_disabled+0xe5/0xf0\n__this_cpu_preempt_check+0x13/0x20\nrcu_force_quiescent_state.part.0+0x1c/0x170\nrcu_force_quiescent_state+0x1e/0x30\nrcu_torture_fqs+0xca/0x160\n? rcu_torture_boost+0x430/0x430\nkthread+0x192/0x1d0\n? kthread_complete_and_exit+0x30/0x30\nret_from_fork+0x22/0x30\n\u003c/TASK\u003e\n\nThe problem is that rcu_force_quiescent_state() uses __this_cpu_read()\nin preemptible code instead of the proper raw_cpu_read().  This commit\ntherefore changes __this_cpu_read() to raw_cpu_read()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nrcu: Correcci\u00f3n de la advertencia de lockdep de __this_cpu_read() en rcu_force_quiescent_state()\n\nEjecutar rcutorture con el par\u00e1metro de m\u00f3dulo fqs_duration distinto de cero en un kernel compilado con CONFIG_PREEMPTION=y resulta en el siguiente splat:\n\nBUG: usando __this_cpu_read() en c\u00f3digo preemptible [00000000]\nc\u00f3digo: rcu_torture_fqs/398\nel llamador es __this_cpu_preempt_check+0x13/0x20\nCPU: 3 PID: 398 Comm: rcu_torture_fqs No contaminado 6.0.0-rc1-yoctodev-standard+\nRastro de Llamada:\n[TAREA]\ndump_stack_lvl+0x5b/0x86\ndump_stack+0x10/0x16\ncheck_preemption_disabled+0xe5/0xf0\n__this_cpu_preempt_check+0x13/0x20\nrcu_force_quiescent_state.part.0+0x1c/0x170\nrcu_force_quiescent_state+0x1e/0x30\nrcu_torture_fqs+0xca/0x160\n? rcu_torture_boost+0x430/0x430\nkthread+0x192/0x1d0\n? kthread_complete_and_exit+0x30/0x30\nret_from_fork+0x22/0x30\n[/TAREA]\n\nEl problema es que rcu_force_quiescent_state() usa __this_cpu_read() en c\u00f3digo preemptible en lugar de la raw_cpu_read() adecuada. Este commit, por lo tanto, cambia __this_cpu_read() a raw_cpu_read()."
          }
        ],
        "id": "CVE-2022-50771",
        "lastModified": "2026-11-10T12:10:00.177",
        "metrics": {},
        "published": "2025-12-24T13:16:03.917",
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        "vulnStatus": "Deferred"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-11-06T13:02:35+00:00",
      "cve": "CVE-2022-50771",
      "id": "CVE-2022-50771",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "157",
      "product_status:known_not_affected": "43",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: rcu: Fix __this_cpu_read() lockdep warning in rcu_force_quiescent_state()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50771.json",
      "version": "3"
    }
  }
}



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