scsi: ufs: core: Cancel RTC work during ufshcd_remove()

{
  "id": "cf5bca9b6df998b7adc3f0562926848b5cb9549bb170193afae2cfc729ab093c",
  "url": "https://osv.dev/vulnerability/CVE-2024-56621",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: ufs: core: Cancel RTC work during ufshcd_remove()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Cancel RTC work during ufshcd_remove() Currently, RTC work is only cancelled during __ufshcd_wl_suspend(). When ufshcd is removed in ufshcd_remove(), RTC work is not cancelled. Due to this, any further trigger of the RTC work after ufshcd_remove() would result in a NULL pointer dereference as below: Unable to handle kernel NULL pointer dereference at virtual address 00000000000002a4 Workqueue: events ufshcd_rtc_work Call trace: _raw_spin_lock_irqsave+0x34/0x8c pm_runtime_get_if_active+0x24/0xb4 ufshcd_rtc_work+0x124/0x19c process_scheduled_works+0x18c/0x2d8 worker_thread+0x144/0x280 kthread+0x11c/0x128 ret_from_fork+0x10/0x20 Since RTC work accesses the ufshcd internal structures, it should be cancelled when ufshcd is removed. So do that in ufshcd_remove(), as per the order in ufshcd_init().",
    "evidence": "osv:CVE-2024-56621",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-56621",
      "aliases": [
        "CVE-2024-56621"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "06701a545e9a3c4e007cff6872a074bf97c40619"
                },
                {
                  "fixed": "57479e37d3f69efee2f0678568274db773284bc8"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6bf999e0eb41850d5c857102535d5c53b2ede224"
                },
                {
                  "fixed": "2e7a3bb0331efb292e0fb022c36bc592137f0520"
                },
                {
                  "fixed": "1695c4361d35b7bdadd7b34f99c9c07741e181e5"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56621.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.8.0"
                },
                {
                  "fixed": "6.12.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56621.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.795249669Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1695c4361d35b7bdadd7b34f99c9c07741e181e5",
        "https://git.kernel.org/stable/c/2e7a3bb0331efb292e0fb022c36bc592137f0520",
        "https://git.kernel.org/stable/c/57479e37d3f69efee2f0678568274db773284bc8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56621.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-56621",
        "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-2024-56621.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-56621",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 513507,
  "published_at": "2024-12-27T14:51:24.948+00:00"
}