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
- Downstream
- Related
- Published
- 2025-02-26T02:12:31Z
- Modified
- 2025-10-21T10:04:59.579619Z
- 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
- block: Fix potential deadlock in blk_ia_range_sysfs_show()
- 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
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda2247f19ee1c5ad75ef095cdfb909a3244b88aa8Fixeddc107c805cde709866b59867ef72b9390199205e
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda2247f19ee1c5ad75ef095cdfb909a3244b88aa8Fixed717b078bc745ba9a262abebed9806a17e8bbb77b
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda2247f19ee1c5ad75ef095cdfb909a3244b88aa8Fixed41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532
Affected versions
v5.*
v5.15
v5.15-rc7
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.17.1
v5.17.10
v5.17.11
v5.17.12
v5.17.13
v5.17.2
v5.17.3
v5.17.4
v5.17.5
v5.17.6
v5.17.7
v5.17.8
v5.17.9
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.18.1
v5.18.2
Database specific
vanir_signatures
[
{
"signature_type": "Function",
"digest": {
"function_hash": "77965036592204736118523167143917196838",
"length": 450.0
},
"target": {
"file": "block/blk-ia-ranges.c",
"function": "blk_ia_range_sysfs_show"
},
"signature_version": "v1",
"id": "CVE-2022-49406-48f0ec23",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@dc107c805cde709866b59867ef72b9390199205e"
},
{
"signature_type": "Function",
"digest": {
"function_hash": "77965036592204736118523167143917196838",
"length": 450.0
},
"target": {
"file": "block/blk-ia-ranges.c",
"function": "blk_ia_range_sysfs_show"
},
"signature_version": "v1",
"id": "CVE-2022-49406-661ec1a4",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@717b078bc745ba9a262abebed9806a17e8bbb77b"
},
{
"signature_type": "Line",
"digest": {
"threshold": 0.9,
"line_hashes": [
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]
},
"target": {
"file": "block/blk-ia-ranges.c"
},
"signature_version": "v1",
"id": "CVE-2022-49406-a765b773",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@717b078bc745ba9a262abebed9806a17e8bbb77b"
},
{
"signature_type": "Line",
"digest": {
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},
"target": {
"file": "block/blk-ia-ranges.c"
},
"signature_version": "v1",
"id": "CVE-2022-49406-cd9e328c",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532"
},
{
"signature_type": "Function",
"digest": {
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"length": 450.0
},
"target": {
"file": "block/blk-ia-ranges.c",
"function": "blk_ia_range_sysfs_show"
},
"signature_version": "v1",
"id": "CVE-2022-49406-f1629476",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@41e46b3c2aa24f755b2ae9ec4ce931ba5f0d8532"
},
{
"signature_type": "Line",
"digest": {
"threshold": 0.9,
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},
"target": {
"file": "block/blk-ia-ranges.c"
},
"signature_version": "v1",
"id": "CVE-2022-49406-fbe8fc90",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@dc107c805cde709866b59867ef72b9390199205e"
}
]