ghsa-56c5-8gc7-wj67
Vulnerability from github
Published
2025-05-08 09:30
Modified
2025-06-05 15:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix WARNING "do not call blocking ops when !TASK_RUNNING"

wait_event_timeout() will set the state of the current task to TASK_UNINTERRUPTIBLE, before doing the condition check. This means that ksmbd_durable_scavenger_alive() will try to acquire the mutex while already in a sleeping state. The scheduler warns us by giving the following warning:

do not call blocking ops when !TASK_RUNNING; state=2 set at [<0000000061515a6f>] prepare_to_wait_event+0x9f/0x6c0 WARNING: CPU: 2 PID: 4147 at kernel/sched/core.c:10099 __might_sleep+0x12f/0x160

mutex lock is not needed in ksmbd_durable_scavenger_alive().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-37802"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-08T07:15:51Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix WARNING \"do not call blocking ops when !TASK_RUNNING\"\n\nwait_event_timeout() will set the state of the current\ntask to TASK_UNINTERRUPTIBLE, before doing the condition check. This\nmeans that ksmbd_durable_scavenger_alive() will try to acquire the mutex\nwhile already in a sleeping state. The scheduler warns us by giving\nthe following warning:\n\ndo not call blocking ops when !TASK_RUNNING; state=2 set at\n [\u003c0000000061515a6f\u003e] prepare_to_wait_event+0x9f/0x6c0\nWARNING: CPU: 2 PID: 4147 at kernel/sched/core.c:10099 __might_sleep+0x12f/0x160\n\nmutex lock is not needed in ksmbd_durable_scavenger_alive().",
  "id": "GHSA-56c5-8gc7-wj67",
  "modified": "2025-06-05T15:31:23Z",
  "published": "2025-05-08T09:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37802"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1df0d4c616138784e033ad337961b6e1a6bcd999"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f805b3746d2f41702c77cba22f94f8415fadd1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd161198e091e8a62b9bd631be970ea9a87d2d6a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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