can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe

{
  "id": "b6af13bfd40145f08eaa4b9b7dba0a6e54e64f2abfb8d0bac914f72b6af67afc",
  "url": "https://osv.dev/vulnerability/CVE-2025-37993",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe The spin lock tx_handling_spinlock in struct m_can_classdev is not being initialized. This leads the following spinlock bad magic complaint from the kernel, eg. when trying to send CAN frames with cansend from can-utils: | BUG: spinlock bad magic on CPU#0, cansend/95 | lock: 0xff60000002ec1010, .magic: 00000000, .owner: /-1, .owner_cpu: 0 | CPU: 0 UID: 0 PID: 95 Comm: cansend Not tainted 6.15.0-rc3-00032-ga79be02bba5c #5 NONE | Hardware name: MachineWare SIM-V (DT) | Call Trace: | [] dump_backtrace+0x1c/0x24 | [] show_stack+0x28/0x34 | [] dump_stack_lvl+0x4a/0x68 | [] dump_stack+0x14/0x1c | [] spin_dump+0x62/0x6e | [] do_raw_spin_lock+0xd0/0x142 | [] _raw_spin_lock_irqsave+0x20/0x2c | [] m_can_start_xmit+0x90/0x34a | [] dev_hard_start_xmit+0xa6/0xee | [] sch_direct_xmit+0x114/0x292 | [] __dev_queue_xmit+0x3b0/0xaa8 | [] can_send+0xc6/0x242 | [] raw_sendmsg+0x1a8/0x36c | [] sock_write_iter+0x9a/0xee | [] vfs_write+0x184/0x3a6 | [] ksys_write+0xa0/0xc0 | [] __riscv_sys_write+0x14/0x1c | [] do_trap_ecall_u+0x168/0x212 | [] handle_exception+0x146/0x152 Initializing the spin lock in m_can_class_allocate_dev solves that problem.",
    "evidence": "osv:CVE-2025-37993",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.29",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-37993",
      "aliases": [
        "CVE-2025-37993"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1fa80e23c15051edc1c594270517de3517ded798"
                },
                {
                  "fixed": "2ecce25ea296f328d79070ee36229a15aeeb7aca"
                },
                {
                  "fixed": "7d5379cfecfdd665e4206bc4f19824656388779f"
                },
                {
                  "fixed": "dcaeeb8ae84c5506ebc574732838264f3887738c"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37993.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.9.0"
                },
                {
                  "fixed": "6.12.29"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.14.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37993.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.967201934Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2ecce25ea296f328d79070ee36229a15aeeb7aca",
        "https://git.kernel.org/stable/c/7d5379cfecfdd665e4206bc4f19824656388779f",
        "https://git.kernel.org/stable/c/dcaeeb8ae84c5506ebc574732838264f3887738c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37993.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37993",
        "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/2025/37xxx/CVE-2025-37993.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37993",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 503160,
  "published_at": "2025-05-29T13:15:52.811+00:00"
}