{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-26671",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-26671"
  ],
  "published": "2024-04-02T06:49:49Z",
  "summary": "blk-mq: fix IO hang from sbitmap wakeup race",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix IO hang from sbitmap wakeup race\n\nIn blk_mq_mark_tag_wait(), __add_wait_queue() may be re-ordered\nwith the following blk_mq_get_driver_tag() in case of getting driver\ntag failure.\n\nThen in __sbitmap_queue_wake_up(), waitqueue_active() may not observe\nthe added waiter in blk_mq_mark_tag_wait() and wake up nothing, meantime\nblk_mq_mark_tag_wait() can't get driver tag successfully.\n\nThis issue can be reproduced by running the following test in loop, and\nfio hang can be observed in < 30min when running it on my test VM\nin laptop.\n\n\tmodprobe -r scsi_debug\n\tmodprobe scsi_debug delay=0 dev_size_mb=4096 max_queue=1 host_max_queue=1 submit_queues=4\n\tdev=`ls -d /sys/bus/pseudo/drivers/scsi_debug/adapter*/host*/target*/*/block/* | head -1 | xargs basename`\n\tfio --filename=/dev/\"$dev\" --direct=1 --rw=randrw --bs=4k --iodepth=1 \\\n       \t\t--runtime=100 --numjobs=40 --time_based --name=test \\\n        \t--ioengine=libaio\n\nFix the issue by adding one explicit barrier in blk_mq_mark_tag_wait(), which\nis just fine in case of running out of tag.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.1.58-1+rpt2",
        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1"
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      "ecosystem_specific": {
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-26671"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9525b38180e2753f0daa1a522b7767a2aa969676"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7610ba1319253225a9ba8a9d28d472fc883b4e2f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/89e0e66682e1538aeeaa3109503473663cd24c8b"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d9c777d3e70bdc57dddf7a14a80059d65919e56"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6d8b01624a2540336a32be91f25187a433af53a0"
    },
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      "url": "https://git.kernel.org/stable/c/f1bc0d8163f8ee84a8d5affdf624cfad657df1d2"
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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}