scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race

{
  "id": "e9a2659bef90fbd663c31ab95b75cf3053e65f8cef2054717d6d4c4d1ecc9294",
  "url": "https://osv.dev/vulnerability/CVE-2026-74555",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race Commit fbefe22811c3 (\"scsi: libsas: Don't always drain event workqueue for HA resume\") introduced sas_resume_ha_no_sync() to avoid a deadlock: the PHYE_RESUME_TIMEOUT handler, running on the HA event workqueue, calls sas_deform_port() -> sas_destruct_devices(), which removes SCSI devices and waits for the host to become runtime-active. But the host cannot resume until sas_resume_ha() -> sas_drain_work() returns, and the drain is blocked on that very handler. However skipping the drain reintroduces a race: hisi_sas returns from resume before all PHY UP work and libsas discovery work finish. The controller may then autosuspend while disks are still waking up. The disks issue IO to a suspended controller, the IO fails, and the disks get disabled. Fix the deadlock at its source by moving the PHYE_RESUME_TIMEOUT notification to after sas_drain_work(). By then the host resume is about to complete, so device removal through device_link no longer blocks on the resume and the cycle is broken. With the deadlock gone, restore sas_resume_ha() (the draining variant) in hisi_sas and remove sas_resume_ha_no_sync(). The reorder is safe for the other libsas consumers (isci, pm8001, aic94xx, mvsas). During suspend, sas_suspend_devices() calls sas_notify_lldd_dev_gone() for each device, which sets dev->lldd_dev to NULL. When scsi_unblock_requests re-enables I/O in",
    "evidence": "osv:CVE-2026-74555",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.1.183",
            "evidence": "/affected/1/ranges"
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            "value": "6.6.151",
            "evidence": "/affected/1/ranges"
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            "value": "6.12.103",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.18.44",
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            "value": "7.1.8",
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    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-74555",
      "aliases": [
        "CVE-2026-74555"
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      "affected": [
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:31.981560260Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/09357f067122e2e28ec52e27013a1660a1571618",
        "https://git.kernel.org/stable/c/3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845",
        "https://git.kernel.org/stable/c/9e24b47ef81d43b3fb1b14294f09991640c79fcc",
        "https://git.kernel.org/stable/c/b9c44a14062093e9fc2d6bddc696cfceadb482d7",
        "https://git.kernel.org/stable/c/c391b5899dd46485a5893696c12ae3e95a3a7325",
        "https://git.kernel.org/stable/c/e50a6523a603594a6d92cdecfe11997d639410a3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74555.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74555",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
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    "related_cves": [
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        "value": "CVE-2026-74555",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 498903,
  "published_at": "2026-08-15T12:28:00.729+00:00"
}