------------[ cut here ]------------
err == -EMSGSIZE
WARNING: net/core/rtnetlink.c:4594 at rtmsg_ifinfo_build_skb+0x21c/0x260, CPU#0: syz.9.7122/23139
Modules linked in:
CPU: 0 UID: 0 PID: 23139 Comm: syz.9.7122 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:rtmsg_ifinfo_build_skb+0x21c/0x260
Code: f6 ba 01 00 00 00 89 e9 e8 01 ee 3a 00 4c 89 f0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 a5 b7 11 f8 90 <0f> 0b 90 eb 8f 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 8b fe ff ff 4c
RSP: 0018:ffffc90006fc67c8 EFLAGS: 00010283
RAX: ffffffff89b5f6ab RBX: 1ffff11023864021 RCX: 0000000000080000
RDX: ffffc90028223000 RSI: 0000000000005f2e RDI: 0000000000005f2f
RBP: 00000000ffffffa6 R08: ffff88802b9f8000 R09: 0000000000000000
R10: fffff52000df8ca0 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888119090a80 R15: ffff88811c320000
FS:  00007f1c089e96c0(0000) GS:ffff88818d6e6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34e22ff8 CR3: 000000016f0be000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 rtnetlink_event+0x1b7/0x270
 notifier_call_chain+0x1a5/0x3d0
 netif_disable_lro+0xdd/0x4b0
 inetdev_init+0x180/0x4d0
 inetdev_event+0x307/0x15e0
 notifier_call_chain+0x1a5/0x3d0
 register_netdevice+0x18a4/0x1eb0
 macsec_newlink+0x706/0x1200
 rtnl_newlink_create+0x305/0x7b0
 rtnl_newlink+0x166d/0x1c30
 rtnetlink_rcv_msg+0x802/0xc00
 netlink_rcv_skb+0x226/0x4a0
 netlink_unicast+0x7bd/0x940
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x13a/0x180
 ____sys_sendmsg+0x54e/0x850
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c07b9e159
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:00007f1c089e9028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1c07e25fa0 RCX: 00007f1c07b9e159
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000004
RBP: 00007f1c07c3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1c07e26038 R14: 00007f1c07e25fa0 R15: 00007ffe9b7da778
 </TASK>
