net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex

{
  "id": "3e4c06047096bca2b4a44844fc4c0ae7b364b098559509567a932be4c944dacf",
  "url": "https://osv.dev/vulnerability/CVE-2024-43862",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex The carrier_lock spinlock protects the carrier detection. While it is held, framer_get_status() is called which in turn takes a mutex. This is not correct and can lead to a deadlock. A run with PROVE_LOCKING enabled detected the issue: [ BUG: Invalid wait context ] ... c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78 other info that might help us debug this: context-{4:4} 2 locks held by ifconfig/146: #0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664 #1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98 Avoid the spinlock usage and convert carrier_lock to a mutex.",
    "evidence": "osv:CVE-2024-43862",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.10.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-43862",
      "aliases": [
        "CVE-2024-43862"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "54762918ca856028d33d1d56d017a4d7706c6196"
                },
                {
                  "fixed": "f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9"
                },
                {
                  "fixed": "c4d6a347ba7babdf9d90a0eb24048c266cae0532"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43862.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.9.0"
                },
                {
                  "fixed": "6.10.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43862.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.638946977Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532",
        "https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43862.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-43862",
        "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/2024/43xxx/CVE-2024-43862.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-43862",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490804,
  "published_at": "2024-08-20T23:45:26.643+00:00"
}