GSD-2021-46956

Vulnerability from gsd - Updated: 2024-02-28 06:03
Details
In the Linux kernel, the following vulnerability has been resolved: virtiofs: fix memory leak in virtio_fs_probe() When accidentally passing twice the same tag to qemu, kmemleak ended up reporting a memory leak in virtiofs. Also, looking at the log I saw the following error (that's when I realised the duplicated tag): virtiofs: probe of virtio5 failed with error -17 Here's the kmemleak log for reference: unreferenced object 0xffff888103d47800 (size 1024): comm "systemd-udevd", pid 118, jiffies 4294893780 (age 18.340s) hex dump (first 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................ backtrace: [<000000000ebb87c1>] virtio_fs_probe+0x171/0x7ae [virtiofs] [<00000000f8aca419>] virtio_dev_probe+0x15f/0x210 [<000000004d6baf3c>] really_probe+0xea/0x430 [<00000000a6ceeac8>] device_driver_attach+0xa8/0xb0 [<00000000196f47a7>] __driver_attach+0x98/0x140 [<000000000b20601d>] bus_for_each_dev+0x7b/0xc0 [<00000000399c7b7f>] bus_add_driver+0x11b/0x1f0 [<0000000032b09ba7>] driver_register+0x8f/0xe0 [<00000000cdd55998>] 0xffffffffa002c013 [<000000000ea196a2>] do_one_initcall+0x64/0x2e0 [<0000000008f727ce>] do_init_module+0x5c/0x260 [<000000003cdedab6>] __do_sys_finit_module+0xb5/0x120 [<00000000ad2f48c6>] do_syscall_64+0x33/0x40 [<00000000809526b5>] entry_SYSCALL_64_after_hwframe+0x44/0xae
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{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-46956"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtiofs: fix memory leak in virtio_fs_probe()\n\nWhen accidentally passing twice the same tag to qemu, kmemleak ended up\nreporting a memory leak in virtiofs.  Also, looking at the log I saw the\nfollowing error (that\u0027s when I realised the duplicated tag):\n\n  virtiofs: probe of virtio5 failed with error -17\n\nHere\u0027s the kmemleak log for reference:\n\nunreferenced object 0xffff888103d47800 (size 1024):\n  comm \"systemd-udevd\", pid 118, jiffies 4294893780 (age 18.340s)\n  hex dump (first 32 bytes):\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n    ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff  ................\n  backtrace:\n    [\u003c000000000ebb87c1\u003e] virtio_fs_probe+0x171/0x7ae [virtiofs]\n    [\u003c00000000f8aca419\u003e] virtio_dev_probe+0x15f/0x210\n    [\u003c000000004d6baf3c\u003e] really_probe+0xea/0x430\n    [\u003c00000000a6ceeac8\u003e] device_driver_attach+0xa8/0xb0\n    [\u003c00000000196f47a7\u003e] __driver_attach+0x98/0x140\n    [\u003c000000000b20601d\u003e] bus_for_each_dev+0x7b/0xc0\n    [\u003c00000000399c7b7f\u003e] bus_add_driver+0x11b/0x1f0\n    [\u003c0000000032b09ba7\u003e] driver_register+0x8f/0xe0\n    [\u003c00000000cdd55998\u003e] 0xffffffffa002c013\n    [\u003c000000000ea196a2\u003e] do_one_initcall+0x64/0x2e0\n    [\u003c0000000008f727ce\u003e] do_init_module+0x5c/0x260\n    [\u003c000000003cdedab6\u003e] __do_sys_finit_module+0xb5/0x120\n    [\u003c00000000ad2f48c6\u003e] do_syscall_64+0x33/0x40\n    [\u003c00000000809526b5\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae",
      "id": "GSD-2021-46956",
      "modified": "2024-02-28T06:03:57.231732Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2021-46956",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "a62a8ef9d97d",
                          "version_value": "310efc95c72c"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "status": "affected",
                                "version": "5.4"
                              },
                              {
                                "lessThan": "5.4",
                                "status": "unaffected",
                                "version": "0",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.4.*",
                                "status": "unaffected",
                                "version": "5.4.118",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.10.*",
                                "status": "unaffected",
                                "version": "5.10.36",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.11.*",
                                "status": "unaffected",
                                "version": "5.11.20",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.12.*",
                                "status": "unaffected",
                                "version": "5.12.3",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "*",
                                "status": "unaffected",
                                "version": "5.13",
                                "versionType": "original_commit_for_fix"
                              }
                            ]
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "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\nvirtiofs: fix memory leak in virtio_fs_probe()\n\nWhen accidentally passing twice the same tag to qemu, kmemleak ended up\nreporting a memory leak in virtiofs.  Also, looking at the log I saw the\nfollowing error (that\u0027s when I realised the duplicated tag):\n\n  virtiofs: probe of virtio5 failed with error -17\n\nHere\u0027s the kmemleak log for reference:\n\nunreferenced object 0xffff888103d47800 (size 1024):\n  comm \"systemd-udevd\", pid 118, jiffies 4294893780 (age 18.340s)\n  hex dump (first 32 bytes):\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n    ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff  ................\n  backtrace:\n    [\u003c000000000ebb87c1\u003e] virtio_fs_probe+0x171/0x7ae [virtiofs]\n    [\u003c00000000f8aca419\u003e] virtio_dev_probe+0x15f/0x210\n    [\u003c000000004d6baf3c\u003e] really_probe+0xea/0x430\n    [\u003c00000000a6ceeac8\u003e] device_driver_attach+0xa8/0xb0\n    [\u003c00000000196f47a7\u003e] __driver_attach+0x98/0x140\n    [\u003c000000000b20601d\u003e] bus_for_each_dev+0x7b/0xc0\n    [\u003c00000000399c7b7f\u003e] bus_add_driver+0x11b/0x1f0\n    [\u003c0000000032b09ba7\u003e] driver_register+0x8f/0xe0\n    [\u003c00000000cdd55998\u003e] 0xffffffffa002c013\n    [\u003c000000000ea196a2\u003e] do_one_initcall+0x64/0x2e0\n    [\u003c0000000008f727ce\u003e] do_init_module+0x5c/0x260\n    [\u003c000000003cdedab6\u003e] __do_sys_finit_module+0xb5/0x120\n    [\u003c00000000ad2f48c6\u003e] do_syscall_64+0x33/0x40\n    [\u003c00000000809526b5\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae"
          }
        ]
      },
      "generator": {
        "engine": "bippy-b01c2a820106"
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8"
          },
          {
            "name": "https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15"
          },
          {
            "name": "https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae"
          },
          {
            "name": "https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6"
          },
          {
            "name": "https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtiofs: fix memory leak in virtio_fs_probe()\n\nWhen accidentally passing twice the same tag to qemu, kmemleak ended up\nreporting a memory leak in virtiofs.  Also, looking at the log I saw the\nfollowing error (that\u0027s when I realised the duplicated tag):\n\n  virtiofs: probe of virtio5 failed with error -17\n\nHere\u0027s the kmemleak log for reference:\n\nunreferenced object 0xffff888103d47800 (size 1024):\n  comm \"systemd-udevd\", pid 118, jiffies 4294893780 (age 18.340s)\n  hex dump (first 32 bytes):\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n    ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff  ................\n  backtrace:\n    [\u003c000000000ebb87c1\u003e] virtio_fs_probe+0x171/0x7ae [virtiofs]\n    [\u003c00000000f8aca419\u003e] virtio_dev_probe+0x15f/0x210\n    [\u003c000000004d6baf3c\u003e] really_probe+0xea/0x430\n    [\u003c00000000a6ceeac8\u003e] device_driver_attach+0xa8/0xb0\n    [\u003c00000000196f47a7\u003e] __driver_attach+0x98/0x140\n    [\u003c000000000b20601d\u003e] bus_for_each_dev+0x7b/0xc0\n    [\u003c00000000399c7b7f\u003e] bus_add_driver+0x11b/0x1f0\n    [\u003c0000000032b09ba7\u003e] driver_register+0x8f/0xe0\n    [\u003c00000000cdd55998\u003e] 0xffffffffa002c013\n    [\u003c000000000ea196a2\u003e] do_one_initcall+0x64/0x2e0\n    [\u003c0000000008f727ce\u003e] do_init_module+0x5c/0x260\n    [\u003c000000003cdedab6\u003e] __do_sys_finit_module+0xb5/0x120\n    [\u003c00000000ad2f48c6\u003e] do_syscall_64+0x33/0x40\n    [\u003c00000000809526b5\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: virtiofs: corrige p\u00e9rdida de memoria en virtio_fs_probe() Al pasar accidentalmente dos veces la misma etiqueta a qemu, kmemleak termin\u00f3 reportando una p\u00e9rdida de memoria en virtiofs. Adem\u00e1s, mirando el registro vi el siguiente error (fue entonces cuando me di cuenta de la etiqueta duplicada): virtiofs: la sonda de virtio5 fall\u00f3 con el error -17 Aqu\u00ed est\u00e1 el registro kmemleak como referencia: objeto sin referencia 0xffff888103d47800 (tama\u00f1o 1024): comm \"systemd- udevd\", pid 118, jiffies 4294893780 (edad 18.340 s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 ......N....... ... ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................ rastreo: [\u0026lt;000000000ebb87c1\u0026gt;] virtio_fs_probe+0x171/0x7ae [virtiofs] [\u0026lt;00000000f8aca419\u0026gt;] virtio_dev_probe+0x15f/0x210 [\u0026lt;000000004d6baf3c\u0026gt;] very_probe+0xea/0x430 [\u0026lt;00000000a6ceeac8\u0026gt;] device_driver_attach+0xa8/0xb0 [\u0026lt;00000000196f47a7 \u0026gt;] __driver_attach+0x98/0x140 [\u0026lt;000000000b20601d\u0026gt;] bus_for_each_dev+0x7b/0xc0 [\u0026lt;00000000399c7b7f\u0026gt;] bus_add_driver+0x11b/0x1f0 [\u0026lt;0000000032b09ba7\u0026gt;] driver_register+0x8f/0xe0 [\u0026lt;00000000cdd55998\u0026gt;] 0xffffffffa002c013 [\u0026lt;000000000ea196a2\u0026gt; ] do_one_initcall+0x64/0x2e0 [\u0026lt;0000000008f727ce\u0026gt;] do_init_module+0x5c/0x260 [\u0026lt;000000003cdedab6\u0026gt; ] __do_sys_finit_module+0xb5/0x120 [\u0026lt;00000000ad2f48c6\u0026gt;] do_syscall_64+0x33/0x40 [\u0026lt;00000000809526b5\u0026gt;] Entry_SYSCALL_64_after_hwframe+0x44/0xae "
          }
        ],
        "id": "CVE-2021-46956",
        "lastModified": "2024-02-28T14:06:45.783",
        "metrics": {},
        "published": "2024-02-27T19:04:06.717",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}



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