nvme-multipath: fix suspicious RCU usage warning

{
  "id": "a584290f1451decb51438e80d2db909a8936a0e89cafb733a4ce58296b3a4ec9",
  "url": "https://osv.dev/vulnerability/CVE-2025-38397",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nvme-multipath: fix suspicious RCU usage warning",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: fix suspicious RCU usage warning When I run the NVME over TCP test in virtme-ng, I get the following \"suspicious RCU usage\" warning in nvme_mpath_add_sysfs_link(): ''' [ 5.024557][ T44] nvmet: Created nvm controller 1 for subsystem nqn.2025-06.org.nvmexpress.mptcp for NQN nqn.2014-08.org.nvmexpress:uuid:f7f6b5e0-ff97-4894-98ac-c85309e0bc77. [ 5.027401][ T183] nvme nvme0: creating 2 I/O queues. [ 5.029017][ T183] nvme nvme0: mapped 2/0/0 default/read/poll queues. [ 5.032587][ T183] nvme nvme0: new ctrl: NQN \"nqn.2025-06.org.nvmexpress.mptcp\", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:f7f6b5e0-ff97-4894-98ac-c85309e0bc77 [ 5.042214][ T25] [ 5.042440][ T25] ============================= [ 5.042579][ T25] WARNING: suspicious RCU usage [ 5.042705][ T25] 6.16.0-rc3+ #23 Not tainted [ 5.042812][ T25] ----------------------------- [ 5.042934][ T25] drivers/nvme/host/multipath.c:1203 RCU-list traversed in non-reader section!! [ 5.043111][ T25] [ 5.043111][ T25] other info that might help us debug this: [ 5.043111][ T25] [ 5.043341][ T25] [ 5.043341][ T25] rcu_scheduler_active = 2, debug_locks = 1 [ 5.043502][ T25] 3 locks held by kworker/u9:0/25: [ 5.043615][ T25] #0: ffff888008730948 ((wq_completion)async){+.+.}-{0:0}, at: process_one_work+0x7ed/0x1350 [ 5.043830][ T25] #1: ffffc900001afd40 ((work_completion)(&entry->work)){+.+.}-{0:0}, at: process_one_work+0xcf3/0x1350 [ 5.044084]",
    "evidence": "osv:CVE-2025-38397",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.15.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-38397",
      "aliases": [
        "CVE-2025-38397"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4dbd2b2ebe4cc5f101881e2c091a70ccd38db7ee"
                },
                {
                  "fixed": "a432383e6cd86d9fda00a6073ed35c1067a836d6"
                },
                {
                  "fixed": "d6811074203b13f715ce2480ac64c5b1c773f2a5"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38397.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.15.0"
                },
                {
                  "fixed": "6.15.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38397.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.788764068Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/a432383e6cd86d9fda00a6073ed35c1067a836d6",
        "https://git.kernel.org/stable/c/d6811074203b13f715ce2480ac64c5b1c773f2a5",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38397.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38397",
        "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/2025/38xxx/CVE-2025-38397.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38397",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 493153,
  "published_at": "2025-07-25T12:53:41.566+00:00"
}