cve-2024-26671
Vulnerability from cvelistv5
Published
2024-04-02 06:49
Modified
2024-12-19 08:44
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d9c777d3e70bdc57dddf7a14a80059d65919e56
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5266caaf5660529e3da53004b8b7174cab6374ed
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d8b01624a2540336a32be91f25187a433af53a0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7610ba1319253225a9ba8a9d28d472fc883b4e2f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89e0e66682e1538aeeaa3109503473663cd24c8b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9525b38180e2753f0daa1a522b7767a2aa969676
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1bc0d8163f8ee84a8d5affdf624cfad657df1d2
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1d9c777d3e70bdc57dddf7a14a80059d65919e56
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5266caaf5660529e3da53004b8b7174cab6374ed
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6d8b01624a2540336a32be91f25187a433af53a0
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7610ba1319253225a9ba8a9d28d472fc883b4e2f
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/89e0e66682e1538aeeaa3109503473663cd24c8b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9525b38180e2753f0daa1a522b7767a2aa969676
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f1bc0d8163f8ee84a8d5affdf624cfad657df1d2
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Impacted products
Vendor Product Version
Linux Linux
Show details on NVD website

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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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1d9c777d3e70bdc57dddf7a14a80059d65919e56\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5266caaf5660529e3da53004b8b7174cab6374ed\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6d8b01624a2540336a32be91f25187a433af53a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7610ba1319253225a9ba8a9d28d472fc883b4e2f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89e0e66682e1538aeeaa3109503473663cd24c8b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9525b38180e2753f0daa1a522b7767a2aa969676\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1bc0d8163f8ee84a8d5affdf624cfad657df1d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1d9c777d3e70bdc57dddf7a14a80059d65919e56\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/5266caaf5660529e3da53004b8b7174cab6374ed\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/6d8b01624a2540336a32be91f25187a433af53a0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/7610ba1319253225a9ba8a9d28d472fc883b4e2f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/89e0e66682e1538aeeaa3109503473663cd24c8b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/9525b38180e2753f0daa1a522b7767a2aa969676\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/f1bc0d8163f8ee84a8d5affdf624cfad657df1d2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
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