gsd-2021-46959
Vulnerability from gsd
Modified
2024-02-28 06:03
Details
In the Linux kernel, the following vulnerability has been resolved: spi: Fix use-after-free with devm_spi_alloc_* We can't rely on the contents of the devres list during spi_unregister_controller(), as the list is already torn down at the time we perform devres_find() for devm_spi_release_controller. This causes devices registered with devm_spi_alloc_{master,slave}() to be mistakenly identified as legacy, non-devm managed devices and have their reference counters decremented below 0. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174 [<b0396f04>] (refcount_warn_saturate) from [<b03c56a4>] (kobject_put+0x90/0x98) [<b03c5614>] (kobject_put) from [<b0447b4c>] (put_device+0x20/0x24) r4:b6700140 [<b0447b2c>] (put_device) from [<b07515e8>] (devm_spi_release_controller+0x3c/0x40) [<b07515ac>] (devm_spi_release_controller) from [<b045343c>] (release_nodes+0x84/0xc4) r5:b6700180 r4:b6700100 [<b04533b8>] (release_nodes) from [<b0454160>] (devres_release_all+0x5c/0x60) r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10 [<b0454104>] (devres_release_all) from [<b044e41c>] (__device_release_driver+0x144/0x1ec) r5:b117ad94 r4:b163dc10 [<b044e2d8>] (__device_release_driver) from [<b044f70c>] (device_driver_detach+0x84/0xa0) r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10 [<b044f688>] (device_driver_detach) from [<b044d274>] (unbind_store+0xe4/0xf8) Instead, determine the devm allocation state as a flag on the controller which is guaranteed to be stable during cleanup.
Aliases


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{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-46959"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: Fix use-after-free with devm_spi_alloc_*\n\nWe can\u0027t rely on the contents of the devres list during\nspi_unregister_controller(), as the list is already torn down at the\ntime we perform devres_find() for devm_spi_release_controller. This\ncauses devices registered with devm_spi_alloc_{master,slave}() to be\nmistakenly identified as legacy, non-devm managed devices and have their\nreference counters decremented below 0.\n\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174\n[\u003cb0396f04\u003e] (refcount_warn_saturate) from [\u003cb03c56a4\u003e] (kobject_put+0x90/0x98)\n[\u003cb03c5614\u003e] (kobject_put) from [\u003cb0447b4c\u003e] (put_device+0x20/0x24)\n r4:b6700140\n[\u003cb0447b2c\u003e] (put_device) from [\u003cb07515e8\u003e] (devm_spi_release_controller+0x3c/0x40)\n[\u003cb07515ac\u003e] (devm_spi_release_controller) from [\u003cb045343c\u003e] (release_nodes+0x84/0xc4)\n r5:b6700180 r4:b6700100\n[\u003cb04533b8\u003e] (release_nodes) from [\u003cb0454160\u003e] (devres_release_all+0x5c/0x60)\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\n[\u003cb0454104\u003e] (devres_release_all) from [\u003cb044e41c\u003e] (__device_release_driver+0x144/0x1ec)\n r5:b117ad94 r4:b163dc10\n[\u003cb044e2d8\u003e] (__device_release_driver) from [\u003cb044f70c\u003e] (device_driver_detach+0x84/0xa0)\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\n[\u003cb044f688\u003e] (device_driver_detach) from [\u003cb044d274\u003e] (unbind_store+0xe4/0xf8)\n\nInstead, determine the devm allocation state as a flag on the\ncontroller which is guaranteed to be stable during cleanup.",
      "id": "GSD-2021-46959",
      "modified": "2024-02-28T06:03:57.825134Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2021-46959",
        "STATE": "PUBLIC"
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      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
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                          "version_affected": "\u003c",
                          "version_name": "a4add022c155",
                          "version_value": "62bb2c7f2411"
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                          "version_value": "8bf96425c90f"
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                        {
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                          "version_name": "8c45a1c6c951",
                          "version_value": "8e029707f50a"
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                        {
                          "version_affected": "\u003c",
                          "version_name": "234b432c7b61",
                          "version_value": "28a5529068c5"
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                        {
                          "version_affected": "\u003c",
                          "version_name": "3e04a4976add",
                          "version_value": "001c8e83646a"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "5e844cc37a5c",
                          "version_value": "c7fabe372a90"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "status": "affected",
                                "version": "5.10"
                              },
                              {
                                "lessThan": "5.10",
                                "status": "unaffected",
                                "version": "0",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "4.4.*",
                                "status": "unaffected",
                                "version": "4.4.271",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "4.9.*",
                                "status": "unaffected",
                                "version": "4.9.271",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "4.14.*",
                                "status": "unaffected",
                                "version": "4.14.233",
                                "versionType": "custom"
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                              {
                                "lessThanOrEqual": "4.19.*",
                                "status": "unaffected",
                                "version": "4.19.191",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.4.*",
                                "status": "unaffected",
                                "version": "5.4.119",
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                                "status": "unaffected",
                                "version": "5.10.37",
                                "versionType": "custom"
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                              {
                                "lessThanOrEqual": "5.11.*",
                                "status": "unaffected",
                                "version": "5.11.21",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.12.*",
                                "status": "unaffected",
                                "version": "5.12.4",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "*",
                                "status": "unaffected",
                                "version": "5.13",
                                "versionType": "original_commit_for_fix"
                              }
                            ]
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                      ]
                    }
                  }
                ]
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              "vendor_name": "Linux"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: Fix use-after-free with devm_spi_alloc_*\n\nWe can\u0027t rely on the contents of the devres list during\nspi_unregister_controller(), as the list is already torn down at the\ntime we perform devres_find() for devm_spi_release_controller. This\ncauses devices registered with devm_spi_alloc_{master,slave}() to be\nmistakenly identified as legacy, non-devm managed devices and have their\nreference counters decremented below 0.\n\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174\n[\u003cb0396f04\u003e] (refcount_warn_saturate) from [\u003cb03c56a4\u003e] (kobject_put+0x90/0x98)\n[\u003cb03c5614\u003e] (kobject_put) from [\u003cb0447b4c\u003e] (put_device+0x20/0x24)\n r4:b6700140\n[\u003cb0447b2c\u003e] (put_device) from [\u003cb07515e8\u003e] (devm_spi_release_controller+0x3c/0x40)\n[\u003cb07515ac\u003e] (devm_spi_release_controller) from [\u003cb045343c\u003e] (release_nodes+0x84/0xc4)\n r5:b6700180 r4:b6700100\n[\u003cb04533b8\u003e] (release_nodes) from [\u003cb0454160\u003e] (devres_release_all+0x5c/0x60)\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\n[\u003cb0454104\u003e] (devres_release_all) from [\u003cb044e41c\u003e] (__device_release_driver+0x144/0x1ec)\n r5:b117ad94 r4:b163dc10\n[\u003cb044e2d8\u003e] (__device_release_driver) from [\u003cb044f70c\u003e] (device_driver_detach+0x84/0xa0)\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\n[\u003cb044f688\u003e] (device_driver_detach) from [\u003cb044d274\u003e] (unbind_store+0xe4/0xf8)\n\nInstead, determine the devm allocation state as a flag on the\ncontroller which is guaranteed to be stable during cleanup."
          }
        ]
      },
      "generator": {
        "engine": "bippy-5f0117140d9a"
      },
      "problemtype": {
        "problemtype_data": [
          {
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              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
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      "references": {
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          {
            "name": "https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815"
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          {
            "name": "https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e"
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          {
            "name": "https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c"
          },
          {
            "name": "https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4"
          },
          {
            "name": "https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74"
          },
          {
            "name": "https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1"
          },
          {
            "name": "https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7"
          },
          {
            "name": "https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6"
          },
          {
            "name": "https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: Fix use-after-free with devm_spi_alloc_*\n\nWe can\u0027t rely on the contents of the devres list during\nspi_unregister_controller(), as the list is already torn down at the\ntime we perform devres_find() for devm_spi_release_controller. This\ncauses devices registered with devm_spi_alloc_{master,slave}() to be\nmistakenly identified as legacy, non-devm managed devices and have their\nreference counters decremented below 0.\n\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174\n[\u003cb0396f04\u003e] (refcount_warn_saturate) from [\u003cb03c56a4\u003e] (kobject_put+0x90/0x98)\n[\u003cb03c5614\u003e] (kobject_put) from [\u003cb0447b4c\u003e] (put_device+0x20/0x24)\n r4:b6700140\n[\u003cb0447b2c\u003e] (put_device) from [\u003cb07515e8\u003e] (devm_spi_release_controller+0x3c/0x40)\n[\u003cb07515ac\u003e] (devm_spi_release_controller) from [\u003cb045343c\u003e] (release_nodes+0x84/0xc4)\n r5:b6700180 r4:b6700100\n[\u003cb04533b8\u003e] (release_nodes) from [\u003cb0454160\u003e] (devres_release_all+0x5c/0x60)\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\n[\u003cb0454104\u003e] (devres_release_all) from [\u003cb044e41c\u003e] (__device_release_driver+0x144/0x1ec)\n r5:b117ad94 r4:b163dc10\n[\u003cb044e2d8\u003e] (__device_release_driver) from [\u003cb044f70c\u003e] (device_driver_detach+0x84/0xa0)\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\n[\u003cb044f688\u003e] (device_driver_detach) from [\u003cb044d274\u003e] (unbind_store+0xe4/0xf8)\n\nInstead, determine the devm allocation state as a flag on the\ncontroller which is guaranteed to be stable during cleanup."
          },
          {
            "lang": "es",
            "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: spi: corrige el Use-After-Free con devm_spi_alloc_* No podemos confiar en el contenido de la lista devres durante spi_unregister_controller(), ya que la lista ya est\u00e1 eliminada en ese momento. Realizamos devres_find() para devm_spi_release_controller. Esto hace que los dispositivos registrados con devm_spi_alloc_{master,slave}() se identifiquen err\u00f3neamente como dispositivos heredados, no administrados por devm y sus contadores de referencia disminuyan por debajo de 0. ------------[ cortar aqu\u00ed ] ------------ ADVERTENCIA: CPU: 1 PID: 660 en lib/refcount.c:28 refcount_warn_saturate+0x108/0x174 [] (refcount_warn_saturate) de [] (kobject_put+ 0x90/0x98) [] (kobject_put) de [] (put_device+0x20/0x24) r4:b6700140 [] (put_device) de [] (devm_spi_release_controller+0x3c/0x40 ) [ ] (devm_spi_release_controller) de [] (release_nodes+0x84/0xc4) r5:b6700180 r4:b6700100 [] (release_nodes) de [] (devres_release_all+0x5c/0x6 0) r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10 [] (devres_release_all) de [] (__device_release_driver+0x144/0x1ec) r5:b117ad94 r4:b163dc10 [] (__device_release_driver) de [\u0026lt; b044f70c\u0026gt;] (device_driver_detach+0x84/0xa0) r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10 [] (device_driver_detach) de [ ] (unbind_store+0xe4/0xf8) en su lugar , determine el estado de asignaci\u00f3n devm como un indicador en el controlador que se garantiza que ser\u00e1 estable durante la limpieza."
          }
        ],
        "id": "CVE-2021-46959",
        "lastModified": "2024-03-01T14:04:26.010",
        "metrics": {},
        "published": "2024-02-29T23:15:07.230",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}


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