CVE-2026-98304: net: bcmgenet: restore the hardware filters on open

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

net: bcmgenet: restore the hardware filters on open

bcmgenethfbinit() runs INITLISTHEAD() on priv->rxnfclist, which drops every rule off the list, and bcmgenetopen() calls it on each ifup. Every rule the user configured is silently lost:

# ethtool -N eth0 flow-type ether dst $MAC action 0 Added rule with ID 0 # ethtool -n eth0 | grep -c Filter: 1 # ip link set eth0 down && ip link set eth0 up # ethtool -n eth0 | grep -c Filter: 0

Initialise the lists once at probe and restore the rules on open, as bcmgenetresume() already does.