fkie_cve-2024-35929
Vulnerability from fkie_nvd
Published
2024-05-19 11:15
Modified
2024-12-30 19:56
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: rcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock() For the kernels built with CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y and CONFIG_RCU_LAZY=y, the following scenarios will trigger WARN_ON_ONCE() in the rcu_nocb_bypass_lock() and rcu_nocb_wait_contended() functions: CPU2 CPU11 kthread rcu_nocb_cb_kthread ksys_write rcu_do_batch vfs_write rcu_torture_timer_cb proc_sys_write __kmem_cache_free proc_sys_call_handler kmemleak_free drop_caches_sysctl_handler delete_object_full drop_slab __delete_object shrink_slab put_object lazy_rcu_shrink_scan call_rcu rcu_nocb_flush_bypass __call_rcu_commn rcu_nocb_bypass_lock raw_spin_trylock(&rdp->nocb_bypass_lock) fail atomic_inc(&rdp->nocb_lock_contended); rcu_nocb_wait_contended WARN_ON_ONCE(smp_processor_id() != rdp->cpu); WARN_ON_ONCE(atomic_read(&rdp->nocb_lock_contended)) | |_ _ _ _ _ _ _ _ _ _same rdp and rdp->cpu != 11_ _ _ _ _ _ _ _ _ __| Reproduce this bug with "echo 3 > /proc/sys/vm/drop_caches". This commit therefore uses rcu_nocb_try_flush_bypass() instead of rcu_nocb_flush_bypass() in lazy_rcu_shrink_scan(). If the nocb_bypass queue is being flushed, then rcu_nocb_try_flush_bypass will return directly.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d58c9fb45c70e62c19e8be3f3605889c47601bcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/927d1f4f77e4784ab3944a9df86ab14d1cd3185aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dda98810b552fc6bf650f4270edeebdc2f28bd3fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4d58c9fb45c70e62c19e8be3f3605889c47601bcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/927d1f4f77e4784ab3944a9df86ab14d1cd3185aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dda98810b552fc6bf650f4270edeebdc2f28bd3fPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "06E895C1-812D-4DD3-AC6C-7069937B982A",
              "versionEndExcluding": "6.6.27",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "22CA5433-1303-41EF-AD4C-F4645DC01541",
              "versionEndExcluding": "6.8.6",
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            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock()\n\nFor the kernels built with CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y and\nCONFIG_RCU_LAZY=y, the following scenarios will trigger WARN_ON_ONCE()\nin the rcu_nocb_bypass_lock() and rcu_nocb_wait_contended() functions:\n\n        CPU2                                               CPU11\nkthread\nrcu_nocb_cb_kthread                                       ksys_write\nrcu_do_batch                                              vfs_write\nrcu_torture_timer_cb                                      proc_sys_write\n__kmem_cache_free                                         proc_sys_call_handler\nkmemleak_free                                             drop_caches_sysctl_handler\ndelete_object_full                                        drop_slab\n__delete_object                                           shrink_slab\nput_object                                                lazy_rcu_shrink_scan\ncall_rcu                                                  rcu_nocb_flush_bypass\n__call_rcu_commn                                            rcu_nocb_bypass_lock\n                                                            raw_spin_trylock(\u0026rdp-\u003enocb_bypass_lock) fail\n                                                            atomic_inc(\u0026rdp-\u003enocb_lock_contended);\nrcu_nocb_wait_contended                                     WARN_ON_ONCE(smp_processor_id() != rdp-\u003ecpu);\n WARN_ON_ONCE(atomic_read(\u0026rdp-\u003enocb_lock_contended))                                          |\n                            |_ _ _ _ _ _ _ _ _ _same rdp and rdp-\u003ecpu != 11_ _ _ _ _ _ _ _ _ __|\n\nReproduce this bug with \"echo 3 \u003e /proc/sys/vm/drop_caches\".\n\nThis commit therefore uses rcu_nocb_try_flush_bypass() instead of\nrcu_nocb_flush_bypass() in lazy_rcu_shrink_scan().  If the nocb_bypass\nqueue is being flushed, then rcu_nocb_try_flush_bypass will return\ndirectly."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: rcu/nocb: corrija WARN_ON_ONCE() en rcu_nocb_bypass_lock() Para los kernels creados con CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y y CONFIG_RCU_LAZY=y, los siguientes escenarios activar\u00e1n WARN_ON_ONCE() en rcu_nocb_bypass_lock( ) y funciones rcu_nocb_wait_contended(): CPU2 CPU11 kthread rcu_nocb_cb_kthread ksys_write rcu_do_batch vfs_write rcu_torture_timer_cb proc_sys_write __kmem_cache_free proc_sys_call_handler kmemleak_free drop_caches_sysctl_handler delete_object_full losa __delete_object encogimiento_slab put_object lazy_rcu_shrink_scan call_rcu rcu_nocb_flush_bypass __call_rcu_commn rcu_nocb_bypass_lock raw_spin_trylock(\u0026amp;rdp-\u0026gt;nocb_bypass_lock) fail atomic_inc(\u0026amp;rdp-\u0026gt;nocb_lock_contended); rcu_nocb_wait_contended WARN_ON_ONCE(smp_processor_id()!= rdp-\u0026gt;cpu); WARN_ON_ONCE(atomic_read(\u0026amp;rdp-\u0026gt;nocb_lock_contended)) | |_ _ _ _ _ _ _ _ _ _mismo rdp y rdp-\u0026gt;cpu != 11_ _ _ _ _ _ _ _ _ __| Reproduzca este error con \"echo 3 \u0026gt; /proc/sys/vm/drop_caches\". Por lo tanto, esta confirmaci\u00f3n utiliza rcu_nocb_try_flush_bypass() en lugar de rcu_nocb_flush_bypass() en lazy_rcu_shrink_scan(). Si se est\u00e1 vaciando la cola nocb_bypass, entonces rcu_nocb_try_flush_bypass regresar\u00e1 directamente."
    }
  ],
  "id": "CVE-2024-35929",
  "lastModified": "2024-12-30T19:56:30.927",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-05-19T11:15:48.993",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/4d58c9fb45c70e62c19e8be3f3605889c47601bc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/927d1f4f77e4784ab3944a9df86ab14d1cd3185a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/dda98810b552fc6bf650f4270edeebdc2f28bd3f"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/4d58c9fb45c70e62c19e8be3f3605889c47601bc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/927d1f4f77e4784ab3944a9df86ab14d1cd3185a"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/dda98810b552fc6bf650f4270edeebdc2f28bd3f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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