rcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle()

{
  "id": "52a37c6f2657e36514cc6f92df55f95e88c8c4b91d09a7905aff16081c0e4f24",
  "url": "https://osv.dev/vulnerability/CVE-2023-54246",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "rcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: rcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle() The rcuscale.holdoff module parameter can be used to delay the start of rcu_scale_writer() kthread. However, the hung-task timeout will trigger when the timeout specified by rcuscale.holdoff is greater than hung_task_timeout_secs: runqemu kvm nographic slirp qemuparams=\"-smp 4 -m 2048M\" bootparams=\"rcuscale.shutdown=0 rcuscale.holdoff=300\" [ 247.071753] INFO: task rcu_scale_write:59 blocked for more than 122 seconds. [ 247.072529] Not tainted 6.4.0-rc1-00134-gb9ed6de8d4ff #7 [ 247.073400] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message. [ 247.074331] task:rcu_scale_write state:D stack:30144 pid:59 ppid:2 flags:0x00004000 [ 247.075346] Call Trace: [ 247.075660] [ 247.075965] __schedule+0x635/0x1280 [ 247.076448] ? __pfx___schedule+0x10/0x10 [ 247.076967] ? schedule_timeout+0x2dc/0x4d0 [ 247.077471] ? __pfx_lock_release+0x10/0x10 [ 247.078018] ? enqueue_timer+0xe2/0x220 [ 247.078522] schedule+0x84/0x120 [ 247.078957] schedule_timeout+0x2e1/0x4d0 [ 247.079447] ? __pfx_schedule_timeout+0x10/0x10 [ 247.080032] ? __pfx_rcu_scale_writer+0x10/0x10 [ 247.080591] ? __pfx_process_timeout+0x10/0x10 [ 247.081163] ? __pfx_sched_set_fifo_low+0x10/0x10 [ 247.081760] ? __pfx_rcu_scale_writer+0x10/0x10 [ 247.082287] rcu_scale_writer+0x6b1/0x7f0 [ 247.082773] ? mark_held_locks+0x29/0xa0 [ 247.083252] ? __pfx_rcu_scale_writer",
    "evidence": "osv:CVE-2023-54246",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.197",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.133",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.5.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-54246",
      "aliases": [
        "CVE-2023-54246"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "df37e66bfdbb57e8cae7dbf39a0c66b1b8701338"
                },
                {
                  "fixed": "55887adc76e19aec9763186e2c1d0a3481d20e96"
                },
                {
                  "fixed": "4f03fba096bfded90e0d71eba8839a46922164d1"
                },
                {
                  "fixed": "83ed0cdb6ae0383dd14b02375c353773836884ed"
                },
                {
                  "fixed": "9416dccb31fdb190d25d57e97674f232651f6560"
                },
                {
                  "fixed": "e60c122a1614b4f65b29a7bef9d83b9fd30e937a"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54246.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.7.0"
                },
                {
                  "fixed": "5.10.197"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.133"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.55"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.5.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54246.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.072572622Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/4f03fba096bfded90e0d71eba8839a46922164d1",
        "https://git.kernel.org/stable/c/55887adc76e19aec9763186e2c1d0a3481d20e96",
        "https://git.kernel.org/stable/c/83ed0cdb6ae0383dd14b02375c353773836884ed",
        "https://git.kernel.org/stable/c/9416dccb31fdb190d25d57e97674f232651f6560",
        "https://git.kernel.org/stable/c/e60c122a1614b4f65b29a7bef9d83b9fd30e937a",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54246.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-54246",
        "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/2023/54xxx/CVE-2023-54246.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-54246",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 503498,
  "published_at": "2025-12-30T12:15:44.729+00:00"
}