------------[ cut here ]------------
err == -EMSGSIZE
WARNING: net/core/rtnetlink.c:4599 at rtmsg_ifinfo_build_skb+0x1c1/0x260 net/core/rtnetlink.c:4599, CPU#0: syz.2.3151/13046
Modules linked in:
CPU: 0 UID: 0 PID: 13046 Comm: syz.2.3151 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026
RIP: 0010:rtmsg_ifinfo_build_skb+0x1c1/0x260 net/core/rtnetlink.c:4599
Code: ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 80 00 00 00 45 8b 76 08 e9 3c ff ff ff e8 90 96 64 f8 90 <0f> 0b 90 ba 02 00 00 00 48 89 ee 31 ff bb a6 ff ff ff e8 58 7a f0
RSP: 0018:ffffc90002566de0 EFLAGS: 00010287
RAX: 000000000000aa6c RBX: 00000000ffffffa6 RCX: ffffc90005991000
RDX: 0000000000080000 RSI: ffffffff89a78920 RDI: ffff88802e860000
RBP: ffff888073e24b40 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffa6 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880341a6108
FS:  00007f1c97eb56c0(0000) GS:ffff888123b59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f400fbaedc0 CR3: 000000007b5b5000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 rtmsg_ifinfo_event net/core/rtnetlink.c:4627 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4617 [inline]
 rtnetlink_event+0x137/0x1f0 net/core/rtnetlink.c:7197
 notifier_call_chain+0x99/0x3f0 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x110 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 net/core/dev.c:11165 [inline]
 netdev_update_features net/core/dev.c:11162 [inline]
 netif_disable_lro+0x3e9/0x660 net/core/dev.c:1854
 inetdev_init+0x371/0x570 net/ipv4/devinet.c:284
 inetdev_event+0x827/0x17f0 net/ipv4/devinet.c:1590
 notifier_call_chain+0x99/0x3f0 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x110 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+0x1998/0x25a0 net/core/dev.c:11541
 macsec_newlink+0x4fb/0x1c50 drivers/net/macsec.c:4223
 rtnl_newlink_create net/core/rtnetlink.c:3974 [inline]
 __rtnl_newlink net/core/rtnetlink.c:4103 [inline]
 rtnl_newlink+0x1697/0x2620 net/core/rtnetlink.c:4220
 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:7137
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec net/socket.c:800 [inline]
 __sock_sendmsg net/socket.c:815 [inline]
 ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2713
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2767
 __sys_sendmsg+0x160/0x210 net/socket.c:2799
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c96f9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1c97eb5028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1c97225fa0 RCX: 00007f1c96f9e159
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000004
RBP: 00007f1c9703506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c97226038 R14: 00007f1c97225fa0 R15: 00007ffddf06c3e8
 </TASK>