configfs: fix possible memory leak in configfs_create_dir()

{
  "id": "c8f8e609befca4608bec2dd4fe5c14379f470714c81feef1187d4d3a01cfba62",
  "url": "https://osv.dev/vulnerability/CVE-2022-50751",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "configfs: fix possible memory leak in configfs_create_dir()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: configfs: fix possible memory leak in configfs_create_dir() kmemleak reported memory leaks in configfs_create_dir(): unreferenced object 0xffff888009f6af00 (size 192): comm \"modprobe\", pid 3777, jiffies 4295537735 (age 233.784s) backtrace: kmem_cache_alloc (mm/slub.c:3250 mm/slub.c:3256 mm/slub.c:3263 mm/slub.c:3273) new_fragment (./include/linux/slab.h:600 fs/configfs/dir.c:163) configfs_register_subsystem (fs/configfs/dir.c:1857) basic_write (drivers/hwtracing/stm/p_basic.c:14) stm_p_basic do_one_initcall (init/main.c:1296) do_init_module (kernel/module/main.c:2455) ... unreferenced object 0xffff888003ba7180 (size 96): comm \"modprobe\", pid 3777, jiffies 4295537735 (age 233.784s) backtrace: kmem_cache_alloc (mm/slub.c:3250 mm/slub.c:3256 mm/slub.c:3263 mm/slub.c:3273) configfs_new_dirent (./include/linux/slab.h:723 fs/configfs/dir.c:194) configfs_make_dirent (fs/configfs/dir.c:248) configfs_create_dir (fs/configfs/dir.c:296) configfs_attach_group.isra.28 (fs/configfs/dir.c:816 fs/configfs/dir.c:852) configfs_register_subsystem (fs/configfs/dir.c:1881) basic_write (drivers/hwtracing/stm/p_basic.c:14) stm_p_basic do_one_initcall (init/main.c:1296) do_init_module (kernel/module/main.c:2455) ... This is because the refcount is not correct in configfs_make_dirent(). For normal stage, the refcount is changing as: configfs_register_subsystem() configfs_create_dir() configfs_make_dirent() configfs_new_dirent() # set",
    "evidence": "osv:CVE-2022-50751",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.229",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.163",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.86",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50751",
      "aliases": [
        "CVE-2022-50751"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7063fbf2261194f72ee75afca67b3b38b554b5fa"
                },
                {
                  "fixed": "90c38f57a821499391526b15cc944c265bd24e48"
                },
                {
                  "fixed": "74ac7c9ee2d486c501e7864c903f5098fc477acd"
                },
                {
                  "fixed": "07f82dca112262b169bec0001378126439cab776"
                },
                {
                  "fixed": "8bc77754224a2c8581727ffe2e958119b4e27c8f"
                },
                {
                  "fixed": "c72eb6e6e49a71f7598740786568fafdd013a227"
                },
                {
                  "fixed": "c65234b283a65cfbfc94619655e820a5e55199eb"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50751.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.16"
                },
                {
                  "fixed": "5.4.229"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.163"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.86"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "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-2022-50751.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.588379996Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07f82dca112262b169bec0001378126439cab776",
        "https://git.kernel.org/stable/c/74ac7c9ee2d486c501e7864c903f5098fc477acd",
        "https://git.kernel.org/stable/c/8bc77754224a2c8581727ffe2e958119b4e27c8f",
        "https://git.kernel.org/stable/c/90c38f57a821499391526b15cc944c265bd24e48",
        "https://git.kernel.org/stable/c/c65234b283a65cfbfc94619655e820a5e55199eb",
        "https://git.kernel.org/stable/c/c72eb6e6e49a71f7598740786568fafdd013a227",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50751.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50751",
        "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-2022-50751.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50751",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 497739,
  "published_at": "2025-12-24T13:05:46.159+00:00"
}