cifs: Fix memory leak on the deferred close

{
  "id": "4adc335b52a9482839b1b7e646f52972971bb130440193c7df0e18ab954067fc",
  "url": "https://osv.dev/vulnerability/CVE-2022-50076",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cifs: Fix memory leak on the deferred close",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory leak on the deferred close xfstests on smb21 report kmemleak as below: unreferenced object 0xffff8881767d6200 (size 64): comm \"xfs_io\", pid 1284, jiffies 4294777434 (age 20.789s) hex dump (first 32 bytes): 80 5a d0 11 81 88 ff ff 78 8a aa 63 81 88 ff ff .Z......x..c.... 00 71 99 76 81 88 ff ff 00 00 00 00 00 00 00 00 .q.v............ backtrace: [<00000000ad04e6ea>] cifs_close+0x92/0x2c0 [<0000000028b93c82>] __fput+0xff/0x3f0 [<00000000d8116851>] task_work_run+0x85/0xc0 [<0000000027e14f9e>] do_exit+0x5e5/0x1240 [<00000000fb492b95>] do_group_exit+0x58/0xe0 [<00000000129a32d9>] __x64_sys_exit_group+0x28/0x30 [<00000000e3f7d8e9>] do_syscall_64+0x35/0x80 [<00000000102e8a0b>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 When cancel the deferred close work, we should also cleanup the struct cifs_deferred_close.",
    "evidence": "osv:CVE-2022-50076",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.63",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.19.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50076",
      "aliases": [
        "CVE-2022-50076"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9e992755be8f2d458a0bcbefd19e493483c1dba2"
                },
                {
                  "fixed": "860efae127888ae535bc4eda1b7f27642727c69e"
                },
                {
                  "fixed": "60b6d38add7b9c17d6e5d49ee8e930ea1a5650c5"
                },
                {
                  "fixed": "ca08d0eac020d48a3141dbec0a3cf64fbdb17cde"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5.13.12"
                },
                {
                  "fixed": "5.14"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0ca6ac8a2691762307beaa4841255d1cfe6b2684"
                }
              ]
            }
          ],
          "versions": [
            "v5.13.19",
            "v5.13.18",
            "v5.13.17",
            "v5.13.16",
            "v5.13.15",
            "v5.13.14",
            "v5.13.13",
            "v5.13.12"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50076.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.14.0"
                },
                {
                  "fixed": "5.15.63"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.19.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50076.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.284691234Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/60b6d38add7b9c17d6e5d49ee8e930ea1a5650c5",
        "https://git.kernel.org/stable/c/860efae127888ae535bc4eda1b7f27642727c69e",
        "https://git.kernel.org/stable/c/ca08d0eac020d48a3141dbec0a3cf64fbdb17cde",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50076.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50076",
        "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-2022-50076.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50076",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 500297,
  "published_at": "2025-06-18T11:02:19.514+00:00"
}