gpio: rcar: Use raw_spinlock to protect register access

{
  "id": "a1990ad505fafe7fcc0e05b7221e7b3063b6490a5c54a5fb7cca74d1809858ee",
  "url": "https://osv.dev/vulnerability/CVE-2025-21912",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "gpio: rcar: Use raw_spinlock to protect register access",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: gpio: rcar: Use raw_spinlock to protect register access Use raw_spinlock in order to fix spurious messages about invalid context when spinlock debugging is enabled. The lock is only used to serialize register access. [ 4.239592] ============================= [ 4.239595] [ BUG: Invalid wait context ] [ 4.239599] 6.13.0-rc7-arm64-renesas-05496-gd088502a519f #35 Not tainted [ 4.239603] ----------------------------- [ 4.239606] kworker/u8:5/76 is trying to lock: [ 4.239609] ffff0000091898a0 (&p->lock){....}-{3:3}, at: gpio_rcar_config_interrupt_input_mode+0x34/0x164 [ 4.239641] other info that might help us debug this: [ 4.239643] context-{5:5} [ 4.239646] 5 locks held by kworker/u8:5/76: [ 4.239651] #0: ffff0000080fb148 ((wq_completion)async){+.+.}-{0:0}, at: process_one_work+0x190/0x62c [ 4.250180] OF: /soc/sound@ec500000/ports/port@0/endpoint: Read of boolean property 'frame-master' with a value. [ 4.254094] #1: ffff80008299bd80 ((work_completion)(&entry->work)){+.+.}-{0:0}, at: process_one_work+0x1b8/0x62c [ 4.254109] #2: ffff00000920c8f8 [ 4.258345] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boolean property 'bitclock-master' with a value. [ 4.264803] (&dev->mutex){....}-{4:4}, at: __device_attach_async_helper+0x3c/0xdc [ 4.264820] #3: ffff00000a50ca40 (request_class#2){+.+.}-{4:4}, at: __setup_irq+0xa0/0x690 [ 4.264840] #4: [ 4.268872] OF: /soc/sound@ec500000/ports/port@1/endpoint: Read of boole",
    "evidence": "osv:CVE-2025-21912",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.241",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.179",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.131",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.83",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-21912",
      "aliases": [
        "CVE-2025-21912"
      ],
      "affected": [
        {
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "fixed": "3e300913c42041e81c5b17a970c4e078086ff2d1"
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                  "fixed": "51ef3073493e2a25dced05fdd59dfb059e7e284d"
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                  "fixed": "f02c41f87cfe61440c18bf77d1ef0a884b9ee2b5"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21912.json"
          }
        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "3.10.0"
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                  "introduced": "6.7.0"
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                {
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            {
              "type": "ECOSYSTEM",
              "events": [
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21912.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.535875Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/389891ac9f678baf68e13623ef1308493af4b074",
        "https://git.kernel.org/stable/c/3e300913c42041e81c5b17a970c4e078086ff2d1",
        "https://git.kernel.org/stable/c/51ef3073493e2a25dced05fdd59dfb059e7e284d",
        "https://git.kernel.org/stable/c/7c1f36f9c9aca507d317479a3d3388150ae40a87",
        "https://git.kernel.org/stable/c/b42c84f9e4ec5bc2885e7fd80c79ec0352f5d2af",
        "https://git.kernel.org/stable/c/c10365031f16514a29c812cd909085a6e4ea4b61",
        "https://git.kernel.org/stable/c/f02c41f87cfe61440c18bf77d1ef0a884b9ee2b5",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21912.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21912",
        "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/2025/21xxx/CVE-2025-21912.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21912",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 507861,
  "published_at": "2025-04-01T15:40:50.299+00:00"
}