CVE-2024-26671 (GCVE-0-2024-26671)
Vulnerability from cvelistv5
Published
2024-04-02 06:49
Modified
2026-01-05 10:34
Severity ?
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/"$dev" --direct=1 --rw=randrw --bs=4k --iodepth=1 \ --runtime=100 --numjobs=40 --time_based --name=test \ --ioengine=libaio Fix the issue by adding one explicit barrier in blk_mq_mark_tag_wait(), which is just fine in case of running out of tag.
References
Impacted products
Vendor Product Version
Linux Linux Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
Version: da55f2cc78418dee88400aafbbaed19d7ac8188e
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__add_wait_queue() may be re-ordered\\nwith the following blk_mq_get_driver_tag() in case of getting driver\\ntag failure.\\n\\nThen in __sbitmap_queue_wake_up(), waitqueue_active() may not observe\\nthe added waiter in blk_mq_mark_tag_wait() and wake up nothing, meantime\\nblk_mq_mark_tag_wait() can\u0027t get driver tag successfully.\\n\\nThis issue can be reproduced by running the following test in loop, and\\nfio hang can be observed in \u003c 30min when running it on my test VM\\nin laptop.\\n\\n\\tmodprobe -r scsi_debug\\n\\tmodprobe scsi_debug delay=0 dev_size_mb=4096 max_queue=1 host_max_queue=1 submit_queues=4\\n\\tdev=`ls -d /sys/bus/pseudo/drivers/scsi_debug/adapter*/host*/target*/*/block/* | head -1 | xargs basename`\\n\\tfio --filename=/dev/\\\"$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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.307\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.269\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.77\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.16\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.4\", \"versionStartIncluding\": \"4.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"4.11\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:34:13.085Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26671\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:34:13.085Z\", \"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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