sound/virtio: Fix cancel_sync warnings on uninitialized work_structs

{
  "id": "184f5ae062d41db974aa07fdddf5afadc843c0fef1840a656112b3b3d6f9330a",
  "url": "https://osv.dev/vulnerability/CVE-2025-37805",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "sound/virtio: Fix cancel_sync warnings on uninitialized work_structs",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: sound/virtio: Fix cancel_sync warnings on uninitialized work_structs Betty reported hitting the following warning: [ 8.709131][ T221] WARNING: CPU: 2 PID: 221 at kernel/workqueue.c:4182 ... [ 8.713282][ T221] Call trace: [ 8.713365][ T221] __flush_work+0x8d0/0x914 [ 8.713468][ T221] __cancel_work_sync+0xac/0xfc [ 8.713570][ T221] cancel_work_sync+0x24/0x34 [ 8.713667][ T221] virtsnd_remove+0xa8/0xf8 [virtio_snd ab15f34d0dd772f6d11327e08a81d46dc9c36276] [ 8.713868][ T221] virtsnd_probe+0x48c/0x664 [virtio_snd ab15f34d0dd772f6d11327e08a81d46dc9c36276] [ 8.714035][ T221] virtio_dev_probe+0x28c/0x390 [ 8.714139][ T221] really_probe+0x1bc/0x4c8 ... It seems we're hitting the error path in virtsnd_probe(), which triggers a virtsnd_remove() which iterates over the substreams calling cancel_work_sync() on the elapsed_period work_struct. Looking at the code, from earlier in: virtsnd_probe()->virtsnd_build_devs()->virtsnd_pcm_parse_cfg() We set snd->nsubstreams, allocate the snd->substreams, and if we then hit an error on the info allocation or something in virtsnd_ctl_query_info() fails, we will exit without having initialized the elapsed_period work_struct. When that error path unwinds we then call virtsnd_remove() which as long as the substreams array is allocated, will iterate through calling cancel_work_sync() on the uninitialized work struct hitting this warning. Takashi Iwai suggested this fix, which initializes",
    "evidence": "osv:CVE-2025-37805",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.181",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.1.136",
            "evidence": "/affected/1/ranges"
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            "value": "6.6.89",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.12.26",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.14.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-37805",
      "aliases": [
        "CVE-2025-37805"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
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            "ecosystem": "Linux"
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      "modified": "2026-10-28T02:30:42.460437028Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3c7df2e27346eb40a0e86230db1ccab195c97cfe",
        "https://git.kernel.org/stable/c/54c7b864fbe4423a07b443a4ada0106052942116",
        "https://git.kernel.org/stable/c/5be9407b41eae20eef9140f5cfbfcbc3d01aaf45",
        "https://git.kernel.org/stable/c/66046b586c0aaa9332483bcdbd76e3305d6138e9",
        "https://git.kernel.org/stable/c/9908498ce929a5a052b79bb7942f9ea317312ce4",
        "https://git.kernel.org/stable/c/e03b10c45c7675b6098190c6e7de1b656d8bcdbe",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37805.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37805",
        "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-2025-37805.json"
      }
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    "related_cves": [
      {
        "value": "CVE-2025-37805",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510252,
  "published_at": "2025-05-08T06:26:05.084+00:00"
}