mtd: core: fix possible resource leak in init_mtd()

{
  "id": "f63e5be16e4c177ce80ac9c1c946b275874041b4b60fbab0624ae1c65fa94494",
  "url": "https://osv.dev/vulnerability/CVE-2022-50304",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mtd: core: fix possible resource leak in init_mtd()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mtd: core: fix possible resource leak in init_mtd() I got the error report while inject fault in init_mtd(): sysfs: cannot create duplicate filename '/devices/virtual/bdi/mtd-0' Call Trace: dump_stack_lvl+0x67/0x83 sysfs_warn_dup+0x60/0x70 sysfs_create_dir_ns+0x109/0x120 kobject_add_internal+0xce/0x2f0 kobject_add+0x98/0x110 device_add+0x179/0xc00 device_create_groups_vargs+0xf4/0x100 device_create+0x7b/0xb0 bdi_register_va.part.13+0x58/0x2d0 bdi_register+0x9b/0xb0 init_mtd+0x62/0x171 [mtd] do_one_initcall+0x6c/0x3c0 do_init_module+0x58/0x222 load_module+0x268e/0x27d0 __do_sys_finit_module+0xd5/0x140 do_syscall_64+0x37/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd kobject_add_internal failed for mtd-0 with -EEXIST, don't try to register things with the same name in the same directory. Error registering mtd class or bdi: -17 If init_mtdchar() fails in init_mtd(), mtd_bdi will not be unregistered, as a result, we can't load the mtd module again, to fix this by calling bdi_unregister(mtd_bdi) after out_procfs label.",
    "evidence": "osv:CVE-2022-50304",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.0.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50304",
      "aliases": [
        "CVE-2022-50304"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "445caaa20c4d6da74f426464f90513b81157ad77"
                },
                {
                  "fixed": "78816504100cbd8e6836df9f58cc4fbb8b262f1c"
                },
                {
                  "fixed": "26c304a3f136009c5a2a04e2bf3ac6aa25aabcb4"
                },
                {
                  "fixed": "1aadf01e5076b9ab6bf294b9622335c651314895"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50304.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.10.0"
                },
                {
                  "fixed": "6.0.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50304.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.127917827Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1aadf01e5076b9ab6bf294b9622335c651314895",
        "https://git.kernel.org/stable/c/26c304a3f136009c5a2a04e2bf3ac6aa25aabcb4",
        "https://git.kernel.org/stable/c/78816504100cbd8e6836df9f58cc4fbb8b262f1c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50304.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50304",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50304.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50304",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518181,
  "published_at": "2025-09-15T14:45:59.614+00:00"
}