cbcvebase.
CVE-2024-26671
published 2024-04-02

CVE-2024-26671: 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()…

PriorityP416medium4.7CVSS 3.1
AVLACHPRLUINSUCNINAH
EPSS
0.19%
8.4th percentile
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.

Affected

25 ranges
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.82-1 (bookworm)linux 6.1.82-1 (bookworm)
linuxlinux
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < 9525b38180e2753f0daa1a522b7767a2aa9696769525b38180e2753f0daa1a522b7767a2aa969676
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < 7610ba1319253225a9ba8a9d28d472fc883b4e2f7610ba1319253225a9ba8a9d28d472fc883b4e2f
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < 89e0e66682e1538aeeaa3109503473663cd24c8b89e0e66682e1538aeeaa3109503473663cd24c8b
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < 1d9c777d3e70bdc57dddf7a14a80059d65919e561d9c777d3e70bdc57dddf7a14a80059d65919e56
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < 6d8b01624a2540336a32be91f25187a433af53a06d8b01624a2540336a32be91f25187a433af53a0
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < f1bc0d8163f8ee84a8d5affdf624cfad657df1d2f1bc0d8163f8ee84a8d5affdf624cfad657df1d2
linuxlinux>= da55f2cc78418dee88400aafbbaed19d7ac8188e < 5266caaf5660529e3da53004b8b7174cab6374ed5266caaf5660529e3da53004b8b7174cab6374ed
linuxlinux_kernel< 4.19.3074.19.307
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.82-16.1.82-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 5.4.0-181.2015.4.0-181.201
linuxlinux_kernel>= 0 < 5.15.0-106.1165.15.0-106.116
linuxlinux_kernel>= 4.20 < 5.4.2695.4.269
linuxlinux_kernel>= 5.11 < 5.15.1495.15.149
linuxlinux_kernel>= 5.16 < 6.1.776.1.77
linuxlinux_kernel>= 5.5 < 5.10.2105.10.210
linuxlinux_kernel>= 6.2 < 6.7.46.7.4
msrcazl3_kernel_6.6.82.1-1_on_azure_linux_3.0
msrcazl3_kernel_6.6.92.2-1_on_azure_linux_3.0

CVSS provenance

nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_ubuntu6.5MEDIUM
vendor_debian4.7MEDIUM
vendor_msrc4.7MEDIUM
vendor_redhat4.7MEDIUM
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