CVE-2023-53855 net: dsa: ocelot: call dsa_tag_8021q_unregister() under rtnl_lock() on driver remove

In the Linux kernel, the following vulnerability has been resolved: net: dsa: ocelot: call dsatag8021qunregister under rtnllock on driver remove When the tagging protocol in current use is "ocelot-8021q" and we unbind the driver, we see this splat: $ echo '0000:00:00.2'...

CVE-2023-53855

CVE-2023-53855 is a Linux kernel vulnerability in the DSA/Ocelot tagging path. When the tagging protocol in use is ocelot-8021q and a driver is unbound, the removal path can trigger an assertion failure in RTNL (RTNL: assertion failed at net/dsa/tag_8021q.c:409) and in vlan_vid_del, due to callin...