isofs: avoid memory leak in iocharset

{
  "id": "0bf0ddfcd5160a7e8564ab2fc7a4e1456a82a0b009c70134a3b4440993b9b144",
  "url": "https://osv.dev/vulnerability/CVE-2024-56534",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "isofs: avoid memory leak in iocharset",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: isofs: avoid memory leak in iocharset A memleak was found as below: unreferenced object 0xffff0000d10164d8 (size 8): comm \"pool-udisksd\", pid 108217, jiffies 4295408555 hex dump (first 8 bytes): 75 74 66 38 00 cc cc cc utf8.... backtrace (crc de430d31): [] kmemleak_alloc+0xb8/0xc8 [] __kmalloc_node_track_caller_noprof+0x380/0x474 [] kstrdup+0x70/0xfc [] isofs_parse_param+0x228/0x2c0 [isofs] [] vfs_parse_fs_param+0xf4/0x164 [] vfs_parse_fs_string+0x8c/0xd4 [] vfs_parse_monolithic_sep+0xb0/0xfc [] generic_parse_monolithic+0x30/0x3c [] parse_monolithic_mount_data+0x40/0x4c [] path_mount+0x6c4/0x9ec [] do_mount+0xac/0xc4 [] __arm64_sys_mount+0x16c/0x2b0 [] invoke_syscall+0x7c/0x104 [] el0_svc_common.constprop.1+0xe0/0x104 [] do_el0_svc+0x2c/0x38 [] el0_svc+0x3c/0x1b8 The opt->iocharset is freed inside the isofs_fill_super function, But there may be situations where it's not possible to enter this function. For example, in the get_tree_bdev_flags function,when encountering the situation where \"Can't mount, would change RO state,\" In such a case, isofs_fill_super will not have the opportunity to be called,which means that opt->iocharset will not have the chance to be freed,ultimately leading to a memory leak. Let's move the memory freeing of opt->iocharset into isofs_free_fc function.",
    "evidence": "osv:CVE-2024-56534",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.11.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-56534",
      "aliases": [
        "CVE-2024-56534"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1b17a46c9243e9421ee1ac6d628604bbc4ae2201"
                },
                {
                  "fixed": "34f090ddb3630a26e5a6b220bf3bfaf5c7b70393"
                },
                {
                  "fixed": "0fbab266ca8000333c966f5b58cb9b9cac658573"
                },
                {
                  "fixed": "0b5bbeee4de616a268db77e2f40f19ab010a367b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56534.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.10.0"
                },
                {
                  "fixed": "6.11.11"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.12.0"
                },
                {
                  "fixed": "6.12.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56534.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.324901405Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0b5bbeee4de616a268db77e2f40f19ab010a367b",
        "https://git.kernel.org/stable/c/0fbab266ca8000333c966f5b58cb9b9cac658573",
        "https://git.kernel.org/stable/c/34f090ddb3630a26e5a6b220bf3bfaf5c7b70393",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56534.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-56534",
        "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/2024/56xxx/CVE-2024-56534.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-56534",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517255,
  "published_at": "2024-12-27T14:11:17.091+00:00"
}