CVE-2021-47412
- Source
- https://cve.org/CVERecord?id=CVE-2021-47412
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47412.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47412
- Downstream
- Related
- Published
- 2024-05-21T15:15:26.700Z
- Modified
- 2026-03-14T14:51:53.312548Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
block: don't call rqqosops->done_bio if the bio isn't tracked
rq_qos framework is only applied on request based driver, so:
1) rqqosdone_bio() needn't to be called for bio based driver
2) rqqosdone_bio() needn't to be called for bio which isn't tracked, such as bios ended from error handling code.
Especially in bio_endio():
1) request queue is referred via bio->bibdev->bddisk->queue, which may be gone since request queue refcount may not be held in above two cases
2) q->rqqos may be freed in blkcleanup_queue() when calling into _rqqosdonebio()
Fix the potential kernel panic by not calling rqqosops->donebio if the bio isn't tracked. This way is safe because both iocrqosdonebio() and blkcgiolatencydone_bio() are nop if the bio isn't tracked.
- References
Affected packages
Git /
Database specific
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.10.241"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.14.11"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc2"
}
]
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47412.json"