------------[ cut here ]------------ WARNING: net/core/rtnetlink.c:4599 at rtmsg_ifinfo_build_skb+0x21c/0x25c net/core/rtnetlink.c:4599, CPU#1: syz.1.329/6540 Modules linked in: CPU: 1 UID: 0 PID: 6540 Comm: syz.1.329 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : rtmsg_ifinfo_build_skb+0x21c/0x25c net/core/rtnetlink.c:4599 lr : rtmsg_ifinfo_build_skb+0x21c/0x25c net/core/rtnetlink.c:4599 sp : ffff8000953c65f0 x29: ffff8000953c6630 x28: 1fffe0001aaa4c21 x27: 0000000000000000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000002 x23: 0000000000000000 x22: ffff0000d5526000 x21: 0000000000000010 x20: 00000000ffffffa6 x19: ffff0000c80a08c0 x18: 00000000ffffffff x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000080000 x9 : 0000000000019484 x8 : ffff80009bf69000 x7 : 0000000000000000 x6 : 000000007363616d x5 : ffff0000d7703274 x4 : 0000000000000008 x3 : ffff800084d4886c x2 : 00000000ffffffa6 x1 : ffff0000ce715880 x0 : 0000000000000001 Call trace: rtmsg_ifinfo_build_skb+0x21c/0x25c net/core/rtnetlink.c:4599 (P) rtmsg_ifinfo_event+0xb0/0x114 net/core/rtnetlink.c:4627 rtnetlink_event+0xb0/0xf0 net/core/rtnetlink.c:7197 notifier_call_chain+0x1a4/0x624 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info+0xb8/0x120 net/core/dev.c:2275 call_netdevice_notifiers_extack net/core/dev.c:2313 [inline] call_netdevice_notifiers net/core/dev.c:2327 [inline] netdev_features_change net/core/dev.c:1612 [inline] netdev_update_features+0xa4/0xf4 net/core/dev.c:11165 netif_disable_lro+0x5c/0x378 net/core/dev.c:1854 ipv6_add_dev+0x3d8/0x100c net/ipv6/addrconf.c:409 addrconf_notify+0x400/0xbbc net/ipv6/addrconf.c:3686 notifier_call_chain+0x1a4/0x624 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info+0xb8/0x120 net/core/dev.c:2275 call_netdevice_notifiers_extack net/core/dev.c:2313 [inline] call_netdevice_notifiers net/core/dev.c:2327 [inline] register_netdevice+0x1018/0x14c0 net/core/dev.c:11541 macsec_newlink+0x4b0/0xdcc drivers/net/macsec.c:4223 rtnl_newlink_create+0x294/0x6b8 net/core/rtnetlink.c:3974 __rtnl_newlink net/core/rtnetlink.c:4103 [inline] rtnl_newlink+0xfe4/0x138c net/core/rtnetlink.c:4220 rtnetlink_rcv_msg+0x66c/0x9bc net/core/rtnetlink.c:7137 netlink_rcv_skb+0x238/0x414 net/netlink/af_netlink.c:2575 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7164 netlink_unicast_kernel net/netlink/af_netlink.c:1338 [inline] netlink_unicast+0x600/0x7f8 net/netlink/af_netlink.c:1364 netlink_sendmsg+0x648/0x948 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg+0xc8/0x17c net/socket.c:815 ____sys_sendmsg+0x3d0/0x6c8 net/socket.c:2713 ___sys_sendmsg+0x198/0x224 net/socket.c:2767 __sys_sendmsg+0x158/0x204 net/socket.c:2799 __do_sys_sendmsg net/socket.c:2804 [inline] __se_sys_sendmsg net/socket.c:2802 [inline] __arm64_sys_sendmsg+0x88/0x9c net/socket.c:2802 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 irq event stamp: 424 hardirqs last enabled at (423): [] seqcount_lockdep_reader_access include/linux/seqlock.h:75 [inline] hardirqs last enabled at (423): [] read_seqbegin include/linux/seqlock.h:838 [inline] hardirqs last enabled at (423): [] netdev_copy_name+0x9c/0x1e0 net/core/dev.c:1205 hardirqs last disabled at (424): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (414): [] __alloc_skb+0x1c0/0x610 net/core/skbuff.c:698 softirqs last disabled at (410): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (410): [] __alloc_skb+0x1a8/0x610 net/core/skbuff.c:697 ---[ end trace 0000000000000000 ]---