Bug 2360243 (CVE-2025-22116)

Summary:	CVE-2025-22116 kernel: idpf: check error for register_netdev() on init
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-04-16 15:04:18 UTC

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

idpf: check error for register_netdev() on init

Current init logic ignores the error code from register_netdev(),
which will cause WARN_ON() on attempt to unregister it, if there was one,
and there is no info for the user that the creation of the netdev failed.

WARNING: CPU: 89 PID: 6902 at net/core/dev.c:11512 unregister_netdevice_many_notify+0x211/0x1a10
...
[ 3707.563641]  unregister_netdev+0x1c/0x30
[ 3707.563656]  idpf_vport_dealloc+0x5cf/0xce0 [idpf]
[ 3707.563684]  idpf_deinit_task+0xef/0x160 [idpf]
[ 3707.563712]  idpf_vc_core_deinit+0x84/0x320 [idpf]
[ 3707.563739]  idpf_remove+0xbf/0x780 [idpf]
[ 3707.563769]  pci_device_remove+0xab/0x1e0
[ 3707.563786]  device_release_driver_internal+0x371/0x530
[ 3707.563803]  driver_detach+0xbf/0x180
[ 3707.563816]  bus_remove_driver+0x11b/0x2a0
[ 3707.563829]  pci_unregister_driver+0x2a/0x250

Introduce an error check and log the vport number and error code.
On removal make sure to check VPORT_REG_NETDEV flag prior to calling
unregister and free on the netdev.

Add local variables for idx, vport_config and netdev for readability.

Comment 1 Avinash Hanwate 2025-04-17 11:03:50 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025041626-CVE-2025-22116-a2f7@gregkh/T