dm: remove fake timeout to avoid leak request

{
  "id": "5872880b6e777b74b0cf82c973513ff2704f607af31c4098a688d59b38ed1410",
  "url": "https://osv.dev/vulnerability/CVE-2026-43314",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dm: remove fake timeout to avoid leak request",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: dm: remove fake timeout to avoid leak request Since commit 15f73f5b3e59 (\"blk-mq: move failure injection out of blk_mq_complete_request\"), drivers are responsible for calling blk_should_fake_timeout() at appropriate code paths and opportunities. However, the dm driver does not implement its own timeout handler and relies on the timeout handling of its slave devices. If an io-timeout-fail error is injected to a dm device, the request will be leaked and never completed, causing tasks to hang indefinitely. Reproduce: 1. prepare dm which has iscsi slave device 2. inject io-timeout-fail to dm echo 1 >/sys/class/block/dm-0/io-timeout-fail echo 100 >/sys/kernel/debug/fail_io_timeout/probability echo 10 >/sys/kernel/debug/fail_io_timeout/times 3. read/write dm 4. iscsiadm -m node -u Result: hang task like below [ 862.243768] INFO: task kworker/u514:2:151 blocked for more than 122 seconds. [ 862.244133] Tainted: G E 6.19.0-rc1+ #51 [ 862.244337] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message. [ 862.244718] task:kworker/u514:2 state:D stack:0 pid:151 tgid:151 ppid:2 task_flags:0x4288060 flags:0x00080000 [ 862.245024] Workqueue: iscsi_ctrl_3:1 __iscsi_unbind_session [scsi_transport_iscsi] [ 862.245264] Call Trace: [ 862.245587] [ 862.245814] __schedule+0x810/0x15c0 [ 862.246557] schedule+0x69/0x180 [ 862.246760] blk_mq_freeze_queue_wait+0xde/0x120 [ 862.247688] elevator_change+0x16d/0x460 [ 862",
    "evidence": "osv:CVE-2026-43314",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.252",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.202",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.165",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.128",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.75",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-43314",
      "aliases": [
        "CVE-2026-43314"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "e6ee8c0b767540f59e20da3ced282601db8aa502"
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                {
                  "fixed": "ece6720de9403260088209b0b92d45e0b49ff856"
                },
                {
                  "fixed": "8200fca818c1e2f65bc6cb16d934ff6049302197"
                },
                {
                  "fixed": "b307b6307f6459841312432bd4bc9519cbac97f5"
                },
                {
                  "fixed": "4f9e7ca933a9fbf9912a384b061a00c77332cbf0"
                },
                {
                  "fixed": "cf2d06c9fd4b6521ea5b7f73c99c64c2c6f5e224"
                },
                {
                  "fixed": "6cdb21e0c9fdee484feba14fc9e72e9d07daf9f3"
                },
                {
                  "fixed": "c8a23d4c995ef4227bd4de64cd3910637ee6162e"
                },
                {
                  "fixed": "f3a9c95a15d2f4466acad5c68faeff79ca5e9f47"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43314.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.31"
                },
                {
                  "fixed": "5.10.252"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
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                {
                  "fixed": "5.15.202"
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            {
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                  "introduced": "6.2.0"
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            {
              "type": "ECOSYSTEM",
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                {
                  "introduced": "6.7.0"
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                {
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.16"
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            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
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                {
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              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43314.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.081855755Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/4f9e7ca933a9fbf9912a384b061a00c77332cbf0",
        "https://git.kernel.org/stable/c/6cdb21e0c9fdee484feba14fc9e72e9d07daf9f3",
        "https://git.kernel.org/stable/c/8200fca818c1e2f65bc6cb16d934ff6049302197",
        "https://git.kernel.org/stable/c/b307b6307f6459841312432bd4bc9519cbac97f5",
        "https://git.kernel.org/stable/c/c8a23d4c995ef4227bd4de64cd3910637ee6162e",
        "https://git.kernel.org/stable/c/cf2d06c9fd4b6521ea5b7f73c99c64c2c6f5e224",
        "https://git.kernel.org/stable/c/ece6720de9403260088209b0b92d45e0b49ff856",
        "https://git.kernel.org/stable/c/f3a9c95a15d2f4466acad5c68faeff79ca5e9f47",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43314.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43314",
        "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/2026/43xxx/CVE-2026-43314.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43314",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 504062,
  "published_at": "2026-05-08T13:11:31.068+00:00"
}