CVE-2022-49227

/// Technical description

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

igc: avoid kernel warning when changing RX ring parameters

Calling ethtool changing the RX ring parameters like this:

$ ethtool -G eth0 rx 1024

on igc triggers kernel warnings like this:

[ 225.198467] ------------[ cut here ]------------

[ 225.198473] Missing unregister, handled but fix driver

[ 225.198485] WARNING: CPU: 7 PID: 959 at net/core/xdp.c:168

xdp_rxq_info_reg+0x79/0xd0

[...]

[ 225.198601] Call Trace:

[ 225.198604] <TASK>

[ 225.198609] igc_setup_rx_resources+0x3f/0xe0 [igc]

[ 225.198617] igc_ethtool_set_ringparam+0x30e/0x450 [igc]

[ 225.198626] ethnl_set_rings+0x18a/0x250

[ 225.198631] genl_family_rcv_msg_doit+0xca/0x110

[ 225.198637] genl_rcv_msg+0xce/0x1c0

[ 225.198640] ? rings_prepare_data+0x60/0x60

[ 225.198644] ? genl_get_cmd+0xd0/0xd0

[ 225.198647] netlink_rcv_skb+0x4e/0xf0

[ 225.198652] genl_rcv+0x24/0x40

[ 225.198655] netlink_unicast+0x20e/0x330

[ 225.198659] netlink

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References