CVE-2022-48817

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48817
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48817.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48817
Related
Published
2024-07-16T12:15:05Z
Modified
2024-09-18T03:22:37.307197Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

net: dsa: ar9331: register the mdiobus under devres

As explained in commits: 74b6d7d13307 ("net: dsa: realtek: register the MDIO bus under devres") 5135e96a3dd2 ("net: dsa: don't allocate the slavemiibus using devres")

mdiobusfree() will panic when called from devmmdiobusfree() <- devresreleaseall() <- _devicereleasedriver(), and that mdiobus was not previously unregistered.

The ar9331 is an MDIO device, so the initial set of constraints that I thought would cause this (I2C or SPI buses which call ->remove on ->shutdown) do not apply. But there is one more which applies here.

If the DSA master itself is on a bus that calls ->remove from ->shutdown (like dpaa2-eth, which is on the fsl-mc bus), there is a device link between the switch and the DSA master, and devicelinksunbind_consumers() will unbind the ar9331 switch driver on shutdown.

So the same treatment must be applied to all DSA switch drivers, which is: either use devres for both the mdiobus allocation and registration, or don't use devres at all.

The ar9331 driver doesn't have a complex code structure for mdiobus removal, so just replace ofmdiobusregister with the devres variant in order to be all-devres and ensure that we don't free a still-registered bus.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.103-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.10-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.16.10-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}