nvd-json-data-feeds/CVE-2022/CVE-2022-489xx/CVE-2022-48922.json

{
  "id": "CVE-2022-48922",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-08-22T02:15:08.267",
  "lastModified": "2024-09-12T12:52:54.023",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: fix oops caused by irqsoff latency tracer\n\nThe trace_hardirqs_{on,off}() require the caller to setup frame pointer\nproperly. This because these two functions use macro 'CALLER_ADDR1' (aka.\n__builtin_return_address(1)) to acquire caller info. If the $fp is used\nfor other purpose, the code generated this macro (as below) could trigger\nmemory access fault.\n\n   0xffffffff8011510e <+80>:    ld      a1,-16(s0)\n   0xffffffff80115112 <+84>:    ld      s2,-8(a1)  # <-- paging fault here\n\nThe oops message during booting if compiled with 'irqoff' tracer enabled:\n[    0.039615][    T0] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000f8\n[    0.041925][    T0] Oops [#1]\n[    0.042063][    T0] Modules linked in:\n[    0.042864][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.17.0-rc1-00233-g9a20c48d1ed2 #29\n[    0.043568][    T0] Hardware name: riscv-virtio,qemu (DT)\n[    0.044343][    T0] epc : trace_hardirqs_on+0x56/0xe2\n[    0.044601][    T0]  ra : restore_all+0x12/0x6e\n[    0.044721][    T0] epc : ffffffff80126a5c ra : ffffffff80003b94 sp : ffffffff81403db0\n[    0.044801][    T0]  gp : ffffffff8163acd8 tp : ffffffff81414880 t0 : 0000000000000020\n[    0.044882][    T0]  t1 : 0098968000000000 t2 : 0000000000000000 s0 : ffffffff81403de0\n[    0.044967][    T0]  s1 : 0000000000000000 a0 : 0000000000000001 a1 : 0000000000000100\n[    0.045046][    T0]  a2 : 0000000000000000 a3 : 0000000000000000 a4 : 0000000000000000\n[    0.045124][    T0]  a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000054494d45\n[    0.045210][    T0]  s2 : ffffffff80003b94 s3 : ffffffff81a8f1b0 s4 : ffffffff80e27b50\n[    0.045289][    T0]  s5 : ffffffff81414880 s6 : ffffffff8160fa00 s7 : 00000000800120e8\n[    0.045389][    T0]  s8 : 0000000080013100 s9 : 000000000000007f s10: 0000000000000000\n[    0.045474][    T0]  s11: 0000000000000000 t3 : 7fffffffffffffff t4 : 0000000000000000\n[    0.045548][    T0]  t5 : 0000000000000000 t6 : ffffffff814aa368\n[    0.045620][    T0] status: 0000000200000100 badaddr: 00000000000000f8 cause: 000000000000000d\n[    0.046402][    T0] [<ffffffff80003b94>] restore_all+0x12/0x6e\n\nThis because the $fp(aka. $s0) register is not used as frame pointer in the\nassembly entry code.\n\n\tresume_kernel:\n\t\tREG_L s0, TASK_TI_PREEMPT_COUNT(tp)\n\t\tbnez s0, restore_all\n\t\tREG_L s0, TASK_TI_FLAGS(tp)\n                andi s0, s0, _TIF_NEED_RESCHED\n                beqz s0, restore_all\n                call preempt_schedule_irq\n                j restore_all\n\nTo fix above issue, here we add one extra level wrapper for function\ntrace_hardirqs_{on,off}() so they can be safely called by low level entry\ncode."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: riscv: corrige los errores causados por el rastreador de latencia irqsoff trace_hardirqs_{on,off}() requiere que la persona que llama configure el puntero del marco correctamente. Esto se debe a que estas dos funciones utilizan la macro 'CALLER_ADDR1' (tambi\u00e9n conocida como __builtin_return_address(1)) para adquirir informaci\u00f3n de la persona que llama. Si $fp se usa para otro prop\u00f3sito, el c\u00f3digo generado en esta macro (como se muestra a continuaci\u00f3n) podr\u00eda provocar una falla de acceso a la memoria. 0xffffffff8011510e &lt;+80&gt;: ld a1,-16(s0) 0xffffffff80115112 &lt;+84&gt;: ld s2,-8(a1) # &lt;-- error de paginaci\u00f3n aqu\u00ed El mensaje de ups durante el arranque si se compila con el rastreador 'irqoff' habilitado: [ 0.039615][T0] No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 00000000000000f8 [0.041925][T0] Ups [#1] [0.042063][T0] M\u00f3dulos vinculados en: [0.042864][T0] CPU: 0 PID: 0 Comm : swapper/0 No contaminado 5.17.0-rc1-00233-g9a20c48d1ed2 #29 [ 0.043568][ T0] Nombre de hardware: riscv-virtio,qemu (DT) [ 0.044343][ T0] epc : trace_hardirqs_on+0x56/0xe2 [ 0.044601] [T0] ra: restaurar_all+0x12/0x6e [0.044721][T0] epc: ffffffff80126a5c ra: ffffffff80003b94 sp: ffffffff81403db0 [0.044801][T0] gp: ffffffff8163acd8 tp: ffffffff81414880 t0: 0000000000000020 [0.044882][T0] t1: 0098968000000000 t2 : 0000000000000000 s0 : ffffffff81403de0 [ 0.044967][ T0] s1 : 0000000000000000 a0 : 0000000000000001 a1 : 0000000000000100 [ 0.045046][ T0] a2: 0000000000000000 a3: 0000000000000000 a4: 0000000000000000 [0.045124][T0] a5: 00000000000000000 a6: 0000000000000000 a7: 000000 0054494d45 [ 0.045210][ T0] s2 : ffffffff80003b94 s3 : ffffffff81a8f1b0 s4 : ffffffff80e27b50 [ 0.045289][ T0] s5 : ffffffff81414880 s6 : ffffffff8160fa00 s7 : 00800120e8 [ 0.045389][ T0] s8 : 0000000080013100 s9 : 000000000000007f s10: 00000000000000000 [ 0.045474][ T0 ] s11: 0000000000000000 t3: 7ffffffffffffff t4: 0000000000000000 [0.045548][T0] t5: 0000000000000000 t6: ffffffff814aa368 [0.045620][T0] 0000000200000100 badaddr: 00000000000000f8 causa: 000000000000000d [ 0.046402][ T0] [] restaurar_todo+ 0x12/0x6e Esto porque el $fp(aka. $s0) el registro no se utiliza como puntero de marco en el c\u00f3digo de entrada del ensamblado. resume_kernel: reg_l s0, task_ti_preempt_count (tp) bnez s0, restaure_all reg_l s0, task_ti_flags (tp) andi s0, s0, _tif_need_resched beqz s0, restaure_all call preempt_schedul S_ { on,off}() para que puedan ser llamados de forma segura mediante un c\u00f3digo de entrada de bajo nivel."
    }
  ],
  "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",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "configurations": [
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          "negate": false,
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