net: dsa: seville: register the mdiobus under devres

{
  "id": "66ba15643b1840ada78b5aa9c410c2e75d438f16b72eab6429c4403e71abe1b4",
  "url": "https://osv.dev/vulnerability/CVE-2022-48814",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: dsa: seville: register the mdiobus under devres",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: dsa: seville: register the mdiobus under devres As explained in commits: 74b6d7d13307 (\"net: dsa: realtek: register the MDIO bus under devres\") 5135e96a3dd2 (\"net: dsa: don't allocate the slave_mii_bus using devres\") mdiobus_free() will panic when called from devm_mdiobus_free() <- devres_release_all() <- __device_release_driver(), and that mdiobus was not previously unregistered. The Seville VSC9959 switch is a platform device, so the initial set of constraints that I thought would cause this (I2C or SPI buses which call ->remove on ->shutdown) do not apply. But there is one more which applies here. If the DSA master itself is on a bus that calls ->remove from ->shutdown (like dpaa2-eth, which is on the fsl-mc bus), there is a device link between the switch and the DSA master, and device_links_unbind_consumers() will unbind the seville switch driver on shutdown. So the same treatment must be applied to all DSA switch drivers, which is: either use devres for both the mdiobus allocation and registration, or don't use devres at all. The seville driver has a code structure that could accommodate both the mdiobus_unregister and mdiobus_free calls, but it has an external dependency upon mscc_miim_setup() from mdio-mscc-miim.c, which calls devm_mdiobus_alloc_size() on its behalf. So rather than restructuring that, and exporting yet one more symbol mscc_miim_teardown(), let's work with devres and replace of_mdi",
    "evidence": "osv:CVE-2022-48814",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.27",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.16.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-48814",
      "aliases": [
        "CVE-2022-48814"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ac3a68d56651c3dad2c12c7afce065fe15267f44"
                },
                {
                  "fixed": "1d13e7221035947c62800c9d3d99b4ed570e27e7"
                },
                {
                  "fixed": "0e816362d823cd46c666e64d8bffe329ee22f4cc"
                },
                {
                  "fixed": "bd488afc3b39e045ba71aab472233f2a78726e7b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48814.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.9.0"
                },
                {
                  "fixed": "5.15.27"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.16.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48814.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.711787907Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0e816362d823cd46c666e64d8bffe329ee22f4cc",
        "https://git.kernel.org/stable/c/1d13e7221035947c62800c9d3d99b4ed570e27e7",
        "https://git.kernel.org/stable/c/bd488afc3b39e045ba71aab472233f2a78726e7b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48814.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-48814",
        "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/2022/48xxx/CVE-2022-48814.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-48814",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509271,
  "published_at": "2024-07-16T11:44:03.261+00:00"
}