In the Linux kernel, the following vulnerability has been resolved:
net: dsa: lantiq_gswip: don't use devres for mdiobus
As explained in commits:
74b6d7d13307 ("net: dsa: realtek: register the MDIO bus under devres")
5135e96a3dd2 ("net: dsa: don't allocate the slave_mii_bus using devres")
mdiobus_free() will panic when called from devm_mdiobus_free() <-
devres_release_all() <- __device_release_driver(), and that mdiobus was
not previously unregistered.
The GSWIP switch is a platform 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 device_links_unbind_consumers()
will unbind the GSWIP 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 gswip driver has the code structure in place for orderly mdiobus
removal, so just replace devm_mdiobus_alloc() with the non-devres
variant, and add manual free where necessary, to ensure that we don't
let devres free a still-registered bus.
References
Configurations
Configuration 1 (hide)
|
History
03 Oct 2025, 14:19
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0d120dfb5d67edc5bcd1804e167dba2b30809afd - Patch | |
| References | () https://git.kernel.org/stable/c/2443ba2fe396bdde187a2fdfa6a57375643ae93c - Patch | |
| References | () https://git.kernel.org/stable/c/b5652bc50dde7b84e93dfb25479b64b817e377c1 - Patch | |
| References | () https://git.kernel.org/stable/c/e177d2e85ebcd3008c4b2abc293f4118e04eedef - Patch | |
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CWE | NVD-CWE-noinfo |
Information
Published : 2024-07-16 12:15
Updated : 2025-10-03 14:19
NVD link : CVE-2022-48812
Mitre link : CVE-2022-48812
CVE.ORG link : CVE-2022-48812
JSON object : View
Products Affected
linux
- linux_kernel
CWE