hsr_slave_1: Device is already in use.
device hsr_slave_1 left promiscuous mode
syz-executor.0 (8583) used greatest stack depth: 24376 bytes left
veth1_vlan: Device is already in use.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8600 at drivers/net/ipvlan/ipvlan_main.c:63 ipvlan_unregister_nf_hook+0x230/0x260 drivers/net/ipvlan/ipvlan_main.c:63
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8600 Comm: syz-executor.0 Not tainted 4.14.236-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:ipvlan_unregister_nf_hook+0x230/0x260 drivers/net/ipvlan/ipvlan_main.c:63
RSP: 0018:ffff88809e5cf3e8 EFLAGS: 00010297
RAX: ffff88809ea6a5c0 RBX: 0000000000000000 RCX: 1ffff11013d4d5ce
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000282
RBP: ffff888097e98040 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88809ea6a5c0 R12: ffff8880af33b700
R13: ffff8880b2e20480 R14: 0000000000000000 R15: ffff888095b7c6c0
 ipvlan_set_port_mode+0x491/0x5a0 drivers/net/ipvlan/ipvlan_main.c:104
 ipvlan_link_new+0xba2/0xfa0 drivers/net/ipvlan/ipvlan_main.c:634
 rtnl_newlink+0xfab/0x1860 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4316
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4665d9
RSP: 002b:00007fff1fc9df48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff1fc9e0e0 R14: 000000000056bf80 R15: 0000000000009780
Kernel Offset: disabled
Rebooting in 86400 seconds..