fkie_cve-2024-50121
Vulnerability from fkie_nvd
Published
2024-11-05 18:15
Modified
2025-01-09 16:16
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: nfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net In the normal case, when we excute `echo 0 > /proc/fs/nfsd/threads`, the function `nfs4_state_destroy_net` in `nfs4_state_shutdown_net` will release all resources related to the hashed `nfs4_client`. If the `nfsd_client_shrinker` is running concurrently, the `expire_client` function will first unhash this client and then destroy it. This can lead to the following warning. Additionally, numerous use-after-free errors may occur as well. nfsd_client_shrinker echo 0 > /proc/fs/nfsd/threads expire_client nfsd_shutdown_net unhash_client ... nfs4_state_shutdown_net /* won't wait shrinker exit */ /* cancel_work(&nn->nfsd_shrinker_work) * nfsd_file for this /* won't destroy unhashed client1 */ * client1 still alive nfs4_state_destroy_net */ nfsd_file_cache_shutdown /* trigger warning */ kmem_cache_destroy(nfsd_file_slab) kmem_cache_destroy(nfsd_file_mark_slab) /* release nfsd_file and mark */ __destroy_client ==================================================================== BUG nfsd_file (Not tainted): Objects remaining in nfsd_file on __kmem_cache_shutdown() -------------------------------------------------------------------- CPU: 4 UID: 0 PID: 764 Comm: sh Not tainted 6.12.0-rc3+ #1 dump_stack_lvl+0x53/0x70 slab_err+0xb0/0xf0 __kmem_cache_shutdown+0x15c/0x310 kmem_cache_destroy+0x66/0x160 nfsd_file_cache_shutdown+0xac/0x210 [nfsd] nfsd_destroy_serv+0x251/0x2a0 [nfsd] nfsd_svc+0x125/0x1e0 [nfsd] write_threads+0x16a/0x2a0 [nfsd] nfsctl_transaction_write+0x74/0xa0 [nfsd] vfs_write+0x1a5/0x6d0 ksys_write+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e ==================================================================== BUG nfsd_file_mark (Tainted: G B W ): Objects remaining nfsd_file_mark on __kmem_cache_shutdown() -------------------------------------------------------------------- dump_stack_lvl+0x53/0x70 slab_err+0xb0/0xf0 __kmem_cache_shutdown+0x15c/0x310 kmem_cache_destroy+0x66/0x160 nfsd_file_cache_shutdown+0xc8/0x210 [nfsd] nfsd_destroy_serv+0x251/0x2a0 [nfsd] nfsd_svc+0x125/0x1e0 [nfsd] write_threads+0x16a/0x2a0 [nfsd] nfsctl_transaction_write+0x74/0xa0 [nfsd] vfs_write+0x1a5/0x6d0 ksys_write+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e To resolve this issue, cancel `nfsd_shrinker_work` using synchronous mode in nfs4_state_shutdown_net.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36775f42e039b01d4abe8998bf66771a37d3cdcc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5ade4382de16c34d9259cb548f36ec5c4555913c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/add1df5eba163a3a6ece11cb85890e2e410baaeaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5ff2fb2e7167e9483846e34148e60c0c016a1f6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f67138dd338cb564ade7d3755c8cd4f68b46d397
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f965dc0f099a54fca100acf6909abe52d0c85328Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12
linux linux_kernel 6.12


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{
  "configurations": [
    {
      "nodes": [
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          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0A0CD37F-23BB-4BB4-89CC-E109F94FA5EB",
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net\n\nIn the normal case, when we excute `echo 0 \u003e /proc/fs/nfsd/threads`, the\nfunction `nfs4_state_destroy_net` in `nfs4_state_shutdown_net` will\nrelease all resources related to the hashed `nfs4_client`. If the\n`nfsd_client_shrinker` is running concurrently, the `expire_client`\nfunction will first unhash this client and then destroy it. This can\nlead to the following warning. Additionally, numerous use-after-free\nerrors may occur as well.\n\nnfsd_client_shrinker         echo 0 \u003e /proc/fs/nfsd/threads\n\nexpire_client                nfsd_shutdown_net\n  unhash_client                ...\n                               nfs4_state_shutdown_net\n                                 /* won\u0027t wait shrinker exit */\n  /*                             cancel_work(\u0026nn-\u003enfsd_shrinker_work)\n   * nfsd_file for this          /* won\u0027t destroy unhashed client1 */\n   * client1 still alive         nfs4_state_destroy_net\n   */\n\n                               nfsd_file_cache_shutdown\n                                 /* trigger warning */\n                                 kmem_cache_destroy(nfsd_file_slab)\n                                 kmem_cache_destroy(nfsd_file_mark_slab)\n  /* release nfsd_file and mark */\n  __destroy_client\n\n====================================================================\nBUG nfsd_file (Not tainted): Objects remaining in nfsd_file on\n__kmem_cache_shutdown()\n--------------------------------------------------------------------\nCPU: 4 UID: 0 PID: 764 Comm: sh Not tainted 6.12.0-rc3+ #1\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xac/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n====================================================================\nBUG nfsd_file_mark (Tainted: G    B   W         ): Objects remaining\nnfsd_file_mark on __kmem_cache_shutdown()\n--------------------------------------------------------------------\n\n dump_stack_lvl+0x53/0x70\n slab_err+0xb0/0xf0\n __kmem_cache_shutdown+0x15c/0x310\n kmem_cache_destroy+0x66/0x160\n nfsd_file_cache_shutdown+0xc8/0x210 [nfsd]\n nfsd_destroy_serv+0x251/0x2a0 [nfsd]\n nfsd_svc+0x125/0x1e0 [nfsd]\n write_threads+0x16a/0x2a0 [nfsd]\n nfsctl_transaction_write+0x74/0xa0 [nfsd]\n vfs_write+0x1a5/0x6d0\n ksys_write+0xc1/0x160\n do_syscall_64+0x5f/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nTo resolve this issue, cancel `nfsd_shrinker_work` using synchronous\nmode in nfs4_state_shutdown_net."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: cancelar nfsd_shrinker_work usando el modo de sincronizaci\u00f3n en nfs4_state_shutdown_net. En el caso normal, cuando ejecutamos `echo 0 \u0026gt; /proc/fs/nfsd/threads`, la funci\u00f3n `nfs4_state_destroy_net` en `nfs4_state_shutdown_net` liberar\u00e1 todos los recursos relacionados con el `nfs4_client` con hash. Si `nfsd_client_shrinker` se est\u00e1 ejecutando simult\u00e1neamente, la funci\u00f3n `expire_client` primero deshar\u00e1 el hash de este cliente y luego lo destruir\u00e1. Esto puede generar la siguiente advertencia. Adem\u00e1s, tambi\u00e9n pueden ocurrir numerosos errores de use-after-free. nfsd_client_shrinker echo 0 \u0026gt; /proc/fs/nfsd/threads expire_client nfsd_shutdown_net unhash_client ... nfs4_state_shutdown_net /* no esperar\u00e1 a que el reductor salga */ /* cancel_work(\u0026amp;nn-\u0026gt;nfsd_shrinker_work) * nfsd_file para esto /* no destruir\u00e1 el cliente1 sin hash */ * el cliente1 sigue activo nfs4_state_destroy_net */ nfsd_file_cache_shutdown /* advertencia de activaci\u00f3n */ kmem_cache_destroy(nfsd_file_slab) kmem_cache_destroy(nfsd_file_mark_slab) /* liberar nfsd_file y marcar */ __destroy_client ============================================================================ ERROR nfsd_file (no contaminado): objetos restantes en nfsd_file en __kmem_cache_shutdown() -------------------------------------------------------------------- CPU: 4 UID: 0 PID: 764 Comm: sh No contaminado 6.12.0-rc3+ #1 dump_stack_lvl+0x53/0x70 slab_err+0xb0/0xf0 __kmem_cache_shutdown+0x15c/0x310 kmem_cache_destroy+0x66/0x160 nfsd_file_cache_shutdown+0xac/0x210 [nfsd] nfsd_destroy_serv+0x251/0x2a0 [nfsd] nfsd_svc+0x125/0x1e0 [nfsd] write_threads+0x16a/0x2a0 [nfsd] nfsctl_transaction_write+0x74/0xa0 [nfsd] vfs_write+0x1a5/0x6d0 ksys_write+0xc1/0x160 do_syscall_64+0x5f/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e ========================================================================= ERROR nfsd_file_mark (Corrompido: GBW): Objetos que permanecen en nfsd_file_mark en __kmem_cache_shutdown() -------------------------------------------------------------------- dump_stack_lvl+0x53/0x70 slab_err+0xb0/0xf0 __kmem_cache_shutdown+0x15c/0x310 kmem_cache_destroy+0x66/0x160 nfsd_file_cache_shutdown+0xc8/0x210 [nfsd] Para resolver este problema, cancele `nfsd_shrinker_work` usando el modo sincr\u00f3nico en nfs4_state_shutdown_net."
    }
  ],
  "id": "CVE-2024-50121",
  "lastModified": "2025-01-09T16:16:20.687",
  "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"
      },
      {
        "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2024-11-05T18:15:15.080",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/36775f42e039b01d4abe8998bf66771a37d3cdcc"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5ade4382de16c34d9259cb548f36ec5c4555913c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/add1df5eba163a3a6ece11cb85890e2e410baaea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/d5ff2fb2e7167e9483846e34148e60c0c016a1f6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f67138dd338cb564ade7d3755c8cd4f68b46d397"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/f965dc0f099a54fca100acf6909abe52d0c85328"
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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