fkie_cve-2024-49976
Vulnerability from fkie_nvd
Published
2024-10-21 18:15
Modified
2024-10-25 20:14
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing/timerlat: Drop interface_lock in stop_kthread() stop_kthread() is the offline callback for "trace/osnoise:online", since commit 5bfbcd1ee57b ("tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread()"), the following ABBA deadlock scenario is introduced: T1 | T2 [BP] | T3 [AP] osnoise_hotplug_workfn() | work_for_cpu_fn() | cpuhp_thread_fun() | _cpu_down() | osnoise_cpu_die() mutex_lock(&interface_lock) | | stop_kthread() | cpus_write_lock() | mutex_lock(&interface_lock) cpus_read_lock() | cpuhp_kick_ap() | As the interface_lock here in just for protecting the "kthread" field of the osn_var, use xchg() instead to fix this issue. Also use for_each_online_cpu() back in stop_per_cpu_kthreads() as it can take cpu_read_lock() again.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09cb44cc3d3df7ade2cebc939d6257a2fa8afc7aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4a05ceffe8fad68b45de38fe2311bda619e76e2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b484a02c9cedf8703eff8f0756f94618004bd165Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db8571a9a098086608c11a15856ff585789e67e8Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.12


To clipboard 

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  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "588DF926-B51D-4153-8125-8F56DE5B5A54",
              "versionEndExcluding": "6.6.55",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/timerlat: Drop interface_lock in stop_kthread()\n\nstop_kthread() is the offline callback for \"trace/osnoise:online\", since\ncommit 5bfbcd1ee57b (\"tracing/timerlat: Add interface_lock around clearing\nof kthread in stop_kthread()\"), the following ABBA deadlock scenario is\nintroduced:\n\nT1                            | T2 [BP]               | T3 [AP]\nosnoise_hotplug_workfn()      | work_for_cpu_fn()     | cpuhp_thread_fun()\n                              |   _cpu_down()         |   osnoise_cpu_die()\n  mutex_lock(\u0026interface_lock) |                       |     stop_kthread()\n                              |     cpus_write_lock() |       mutex_lock(\u0026interface_lock)\n  cpus_read_lock()            |     cpuhp_kick_ap()   |\n\nAs the interface_lock here in just for protecting the \"kthread\" field of\nthe osn_var, use xchg() instead to fix this issue. Also use\nfor_each_online_cpu() back in stop_per_cpu_kthreads() as it can take\ncpu_read_lock() again."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing/timerlat: eliminar interface_lock en stop_kthread() stop_kthread() es la devoluci\u00f3n de llamada fuera de l\u00ednea para \"trace/osnoise:online\", desde el commit 5bfbcd1ee57b (\"tracing/timerlat: agregar interface_lock alrededor de la limpieza de kthread en stop_kthread()\"), se introduce el siguiente escenario de bloqueo ABBA: T1 | T2 [BP] | T3 [AP] osnoise_hotplug_workfn() | work_for_cpu_fn() | cpuhp_thread_fun() | _cpu_down() | osnoise_cpu_die() mutex_lock(\u0026amp;interface_lock) | | stop_kthread() | cpus_write_lock() | mutex_lock(\u0026amp;interface_lock) cpus_read_lock() | cpuhp_kick_ap() | Como interface_lock aqu\u00ed solo sirve para proteger el campo \"kthread\" de osn_var, utilice xchg() en su lugar para solucionar este problema. Utilice tambi\u00e9n for_each_online_cpu() en stop_per_cpu_kthreads(), ya que puede volver a activar cpu_read_lock()."
    }
  ],
  "id": "CVE-2024-49976",
  "lastModified": "2024-10-25T20:14:03.387",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-10-21T18:15:18.353",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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