CVE-2025-22103 net: fix NULL pointer dereference in l3mdev_l3_rcv

In the Linux kernel, the following vulnerability has been resolved: net: fix NULL pointer dereference in l3mdevl3rcv When delete l3s ipvlan: ip link del link eth0 ipvlan1 type ipvlan mode l3s This may cause a null pointer dereference: Call trace: iprcvfinish+0x48/0xd0 iprcv+0x5c/0x100...