CVE-2022-49406
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49406
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49406.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49406
- Related
- Published
- 2025-02-26T07:01:17Z
- Modified
- 2025-04-17T20:29:18Z
- Downstream
- 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: Fix potential deadlock in blkiarangesysfsshow()
When being read, a sysfs attribute is already protected against removal with the kobject node active reference counter. As a result, in blkiarangesysfsshow(), there is no need to take the queue sysfs lock when reading the value of a range attribute. Using the queue sysfs lock in this function creates a potential deadlock situation with the disk removal, something that a lockdep signals with a splat when the device is removed:
[ 760.703551] Possible unsafe locking scenario: [ 760.703551] [ 760.703554] CPU0 CPU1 [ 760.703556] ---- ---- [ 760.703558] lock(&q->sysfslock); [ 760.703565] lock(kn->active#385); [ 760.703573] lock(&q->sysfslock); [ 760.703579] lock(kn->active#385); [ 760.703587] [ 760.703587] * DEADLOCK *
Solve this by removing the mutexlock()/mutexunlock() calls from blkiarangesysfsshow().
- References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source