blk-mq: fix IO hang from sbitmap wakeup race
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.
CVE-2024-26671
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-26671
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "9525b38180e2753f0daa1a522b7767a2aa969676",
"versionType": "git"
},
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "ecd7744a1446eb02ccc63e493e2eb6ede4ef1e10",
"versionType": "git"
},
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "7610ba1319253225a9ba8a9d28d472fc883b4e2f",
"versionType": "git"
},
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "89e0e66682e1538aeeaa3109503473663cd24c8b",
"versionType": "git"
},
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "1d9c777d3e70bdc57dddf7a14a80059d65919e56",
"versionType": "git"
},
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "6d8b01624a2540336a32be91f25187a433af53a0",
"versionType": "git"
},
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "f1bc0d8163f8ee84a8d5affdf624cfad657df1d2",
"versionType": "git"
},
{
"status": "affected",
"version": "da55f2cc78418dee88400aafbbaed19d7ac8188e",
"lessThan": "5266caaf5660529e3da53004b8b7174cab6374ed",
"versionType": "git"
}
],
"programFiles": [
"block/blk-mq.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.307",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.269",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.210",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.149",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.77",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.16",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.4",
"versionType": "semver",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"block/blk-mq.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-26671
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26419 · Revision 1
- Added to Heist Feed
- Publisher date