nvd-json-data-feeds/CVE-2022/CVE-2022-488xx/CVE-2022-48840.json

{
  "id": "CVE-2022-48840",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-07-16T13:15:11.440",
  "lastModified": "2024-07-17T20:37:49.917",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: Fix hang during reboot/shutdown\n\nRecent commit 974578017fc1 (\"iavf: Add waiting so the port is\ninitialized in remove\") adds a wait-loop at the beginning of\niavf_remove() to ensure that port initialization is finished\nprior unregistering net device. This causes a regression\nin reboot/shutdown scenario because in this case callback\niavf_shutdown() is called and this callback detaches the device,\nmakes it down if it is running and sets its state to __IAVF_REMOVE.\nLater shutdown callback of associated PF driver (e.g. ice_shutdown)\nis called. That callback calls among other things sriov_disable()\nthat calls indirectly iavf_remove() (see stack trace below).\nAs the adapter state is already __IAVF_REMOVE then the mentioned\nloop is end-less and shutdown process hangs.\n\nThe patch fixes this by checking adapter's state at the beginning\nof iavf_remove() and skips the rest of the function if the adapter\nis already in remove state (shutdown is in progress).\n\nReproducer:\n1. Create VF on PF driven by ice or i40e driver\n2. Ensure that the VF is bound to iavf driver\n3. Reboot\n\n[52625.981294] sysrq: SysRq : Show Blocked State\n[52625.988377] task:reboot          state:D stack:    0 pid:17359 ppid:     1 f2\n[52625.996732] Call Trace:\n[52625.999187]  __schedule+0x2d1/0x830\n[52626.007400]  schedule+0x35/0xa0\n[52626.010545]  schedule_hrtimeout_range_clock+0x83/0x100\n[52626.020046]  usleep_range+0x5b/0x80\n[52626.023540]  iavf_remove+0x63/0x5b0 [iavf]\n[52626.027645]  pci_device_remove+0x3b/0xc0\n[52626.031572]  device_release_driver_internal+0x103/0x1f0\n[52626.036805]  pci_stop_bus_device+0x72/0xa0\n[52626.040904]  pci_stop_and_remove_bus_device+0xe/0x20\n[52626.045870]  pci_iov_remove_virtfn+0xba/0x120\n[52626.050232]  sriov_disable+0x2f/0xe0\n[52626.053813]  ice_free_vfs+0x7c/0x340 [ice]\n[52626.057946]  ice_remove+0x220/0x240 [ice]\n[52626.061967]  ice_shutdown+0x16/0x50 [ice]\n[52626.065987]  pci_device_shutdown+0x34/0x60\n[52626.070086]  device_shutdown+0x165/0x1c5\n[52626.074011]  kernel_restart+0xe/0x30\n[52626.077593]  __do_sys_reboot+0x1d2/0x210\n[52626.093815]  do_syscall_64+0x5b/0x1a0\n[52626.097483]  entry_SYSCALL_64_after_hwframe+0x65/0xca"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: iavf: corrige el bloqueo durante el reinicio/apagado. El commit reciente 974578017fc1 (\"iavf: agrega espera para que el puerto se inicialice en eliminar\") agrega un bucle de espera al comienzo de iavf_remove() para garantizar que la inicializaci\u00f3n del puerto finalice antes de cancelar el registro del dispositivo de red. Esto provoca una regresi\u00f3n en el escenario de reinicio/apagado porque en este caso se llama a la devoluci\u00f3n de llamada iavf_shutdown() y esta devoluci\u00f3n de llamada desconecta el dispositivo, lo desactiva si se est\u00e1 ejecutando y establece su estado en __IAVF_REMOVE. Posteriormente se llama a la devoluci\u00f3n de llamada de apagado del controlador PF asociado (por ejemplo, ice_shutdown). Esa devoluci\u00f3n de llamada llama, entre otras cosas, a sriov_disable() que llama indirectamente a iavf_remove() (consulte el seguimiento de la pila a continuaci\u00f3n). Como el estado del adaptador ya es __IAVF_REMOVE, el bucle mencionado no tiene fin y el proceso de apagado se bloquea. El parche soluciona este problema verificando el estado del adaptador al comienzo de iavf_remove() y omite el resto de la funci\u00f3n si el adaptador ya est\u00e1 en estado de eliminaci\u00f3n (el apagado est\u00e1 en curso). Reproductor: 1. Cree VF en PF controlado por el controlador ice o i40e 2. Aseg\u00farese de que el VF est\u00e9 vinculado al controlador iavf 3. Reinicie [52625.981294] sysrq: SysRq: Mostrar estado bloqueado [52625.988377] tarea: estado de reinicio: pila D: 0 pid:17359 ppid: 1 f2 [52625.996732] Seguimiento de llamadas: [52625.999187] __schedule+0x2d1/0x830 [52626.007400] Schedule+0x35/0xa0 [52626.010545] Schedule_hrtimeout_range_clock+0x83/0x100 2626.020046] usleep_range+0x5b/0x80 [52626.023540] iavf_remove+ 0x63/0x5b0 [iavf] [52626.027645] pci_device_remove+0x3b/0xc0 [52626.031572] device_release_driver_internal+0x103/0x1f0 [52626.036805] pci_stop_bus_device+0x72/0xa0 [52626. 040904] pci_stop_and_remove_bus_device+0xe/0x20 [52626.045870] pci_iov_remove_virtfn+0xba/0x120 [52626.050232] sriov_disable +0x2f/0xe0 [52626.053813] ice_free_vfs+0x7c/0x340 [hielo] [52626.057946] ice_remove+0x220/0x240 [hielo] [52626.061967] ice_shutdown+0x16/0x50 [52626.06598 7] pci_device_shutdown+0x34/0x60 [52626.070086] dispositivo_shutdown+ 0x165/0x1c5 [52626.074011] kernel_restart+0xe/0x30 [52626.077593] __do_sys_reboot+0x1d2/0x210 [52626.093815] do_syscall_64+0x5b/0x1a0 [52626.097483] entrada_SYSCALL_64_after_hwframe+0x65/0xca"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4477b9a4193b35eb3a8afd2adf2d42add2f88d57",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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