CVE-2024-26671 (GCVE-0-2024-26671)

Vulnerability from cvelistv5 – Published: 2024-04-02 06:49 – Updated: 2026-05-11 20:01
VLAI?
Title
blk-mq: fix IO hang from sbitmap wakeup race
Summary
In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix IO hang from sbitmap wakeup race In blk_mq_mark_tag_wait(), __add_wait_queue() may be re-ordered with the following blk_mq_get_driver_tag() in case of getting driver tag failure. Then in __sbitmap_queue_wake_up(), waitqueue_active() may not observe the added waiter in blk_mq_mark_tag_wait() and wake up nothing, meantime blk_mq_mark_tag_wait() can't get driver tag successfully. This issue can be reproduced by running the following test in loop, and fio hang can be observed in < 30min when running it on my test VM in laptop. modprobe -r scsi_debug modprobe scsi_debug delay=0 dev_size_mb=4096 max_queue=1 host_max_queue=1 submit_queues=4 dev=`ls -d /sys/bus/pseudo/drivers/scsi_debug/adapter*/host*/target*/*/block/* | head -1 | xargs basename` fio --filename=/dev/"$dev" --direct=1 --rw=randrw --bs=4k --iodepth=1 \ --runtime=100 --numjobs=40 --time_based --name=test \ --ioengine=libaio Fix the issue by adding one explicit barrier in blk_mq_mark_tag_wait(), which is just fine in case of running out of tag.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < 9525b38180e2753f0daa1a522b7767a2aa969676 (git)
Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10 (git)
Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < 7610ba1319253225a9ba8a9d28d472fc883b4e2f (git)
Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < 89e0e66682e1538aeeaa3109503473663cd24c8b (git)
Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < 1d9c777d3e70bdc57dddf7a14a80059d65919e56 (git)
Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < 6d8b01624a2540336a32be91f25187a433af53a0 (git)
Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < f1bc0d8163f8ee84a8d5affdf624cfad657df1d2 (git)
Affected: da55f2cc78418dee88400aafbbaed19d7ac8188e , < 5266caaf5660529e3da53004b8b7174cab6374ed (git)
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Linux Linux Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 4.19.307 , ≤ 4.19.* (semver)
Unaffected: 5.4.269 , ≤ 5.4.* (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.77 , ≤ 6.1.* (semver)
Unaffected: 6.6.16 , ≤ 6.6.* (semver)
Unaffected: 6.7.4 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"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\u0027t get driver tag successfully.\\n\\nThis issue can be reproduced by running the following test in loop, and\\nfio hang can be observed in \u003c 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.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: blk-mq: corrige el bloqueo de IO de la carrera de activaci\\u00f3n del mapa de bits En blk_mq_mark_tag_wait(), __add_wait_queue() se puede reordenar con el siguiente blk_mq_get_driver_tag() en caso de que se produzca un error en la etiqueta del controlador. Luego, en __sbitmap_queue_wake_up(), waitqueue_active() puede no observar al camarero agregado en blk_mq_mark_tag_wait() y no despertar nada, mientras tanto, blk_mq_mark_tag_wait() no puede obtener la etiqueta del controlador correctamente. Este problema se puede reproducir ejecutando la siguiente prueba en bucle, y se puede observar un bloqueo de fio en \u0026lt; 30 minutos cuando lo ejecuto en mi m\\u00e1quina virtual de prueba en una computadora port\\u00e1til. modprobe -r scsi_debug modprobe scsi_debug delay=0 dev_size_mb=4096 max_queue=1 host_max_queue=1 submit_queues=4 dev=`ls -d /sys/bus/pseudo/drivers/scsi_debug/adapter*/host*/target*/*/block /* | cabeza -1 | xargs basename` fio --filename=/dev/\\\"$dev\\\" --direct=1 --rw=randrw --bs=4k --io Depth=1 \\\\ --runtime=100 --numjobs=40 --time_based - -name=test \\\\ --ioengine=libaio Solucione el problema agregando una barrera expl\\u00edcita en blk_mq_mark_tag_wait(), lo cual est\\u00e1 bien en caso de quedarse sin etiqueta.\"}]",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26671\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-02T07:15:43.830\",\"lastModified\":\"2025-03-17T15:03:48.280\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblk-mq: fix IO hang from sbitmap wakeup race\\n\\nIn blk_mq_mark_tag_wait(), __add_wait_queue() may be re-ordered\\nwith the following blk_mq_get_driver_tag() in case of getting driver\\ntag failure.\\n\\nThen in __sbitmap_queue_wake_up(), waitqueue_active() may not observe\\nthe added waiter in blk_mq_mark_tag_wait() and wake up nothing, meantime\\nblk_mq_mark_tag_wait() can\u0027t get driver tag successfully.\\n\\nThis issue can be reproduced by running the following test in loop, and\\nfio hang can be observed in \u003c 30min when running it on my test VM\\nin laptop.\\n\\n\\tmodprobe -r scsi_debug\\n\\tmodprobe scsi_debug delay=0 dev_size_mb=4096 max_queue=1 host_max_queue=1 submit_queues=4\\n\\tdev=`ls -d /sys/bus/pseudo/drivers/scsi_debug/adapter*/host*/target*/*/block/* | head -1 | xargs basename`\\n\\tfio --filename=/dev/\\\"$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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: blk-mq: corrige el bloqueo de IO de la carrera de activaci\u00f3n del mapa de bits En blk_mq_mark_tag_wait(), __add_wait_queue() se puede reordenar con el siguiente blk_mq_get_driver_tag() en caso de que se produzca un error en la etiqueta del controlador. Luego, en __sbitmap_queue_wake_up(), waitqueue_active() puede no observar al camarero agregado en blk_mq_mark_tag_wait() y no despertar nada, mientras tanto, blk_mq_mark_tag_wait() no puede obtener la etiqueta del controlador correctamente. Este problema se puede reproducir ejecutando la siguiente prueba en bucle, y se puede observar un bloqueo de fio en \u0026lt; 30 minutos cuando lo ejecuto en mi m\u00e1quina virtual de prueba en una computadora port\u00e1til. modprobe -r scsi_debug modprobe scsi_debug delay=0 dev_size_mb=4096 max_queue=1 host_max_queue=1 submit_queues=4 dev=`ls -d /sys/bus/pseudo/drivers/scsi_debug/adapter*/host*/target*/*/block /* | cabeza -1 | xargs basename` fio --filename=/dev/\\\"$dev\\\" --direct=1 --rw=randrw --bs=4k --io Depth=1 \\\\ --runtime=100 --numjobs=40 --time_based - -name=test \\\\ --ioengine=libaio Solucione el problema agregando una barrera expl\u00edcita en blk_mq_mark_tag_wait(), lo cual est\u00e1 bien en caso de quedarse sin 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    "vulnrichment": {
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      "cveMetadata": "{\"cveId\": \"CVE-2024-26671\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:01:56.325Z\", \"dateReserved\": \"2024-02-19T14:20:24.150Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-02T06:49:13.834Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.